WO2015118779A1 - Desiccant air-conditioning system and method for controlling desiccant air-conditioning system - Google Patents

Desiccant air-conditioning system and method for controlling desiccant air-conditioning system Download PDF

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Publication number
WO2015118779A1
WO2015118779A1 PCT/JP2014/083252 JP2014083252W WO2015118779A1 WO 2015118779 A1 WO2015118779 A1 WO 2015118779A1 JP 2014083252 W JP2014083252 W JP 2014083252W WO 2015118779 A1 WO2015118779 A1 WO 2015118779A1
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Prior art keywords
air
desiccant
absolute humidity
conditioning system
switch
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PCT/JP2014/083252
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French (fr)
Japanese (ja)
Inventor
彰悟 吉良
山下　孝
松雄 神谷
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株式会社日立製作所
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Publication of WO2015118779A1 publication Critical patent/WO2015118779A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/147—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with both heat and humidity transfer between supplied and exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1032—Desiccant wheel

Definitions

  • the present invention relates to a desiccant air conditioning system that performs dehumidification by a desiccant rotor and a technique of a control method for the desiccant air conditioning system.
  • Patent Documents 1 and 2 describe a low-temperature regeneration desiccant air conditioner that switches a supply air path according to the humidity and temperature of the outside air.
  • Patent Documents 1 and 2 switch the control mode (cooling mode or heating mode) only by enthalpy. For this reason, since the techniques described in Patent Documents 1 and 2 perform dehumidification even when the humidity of the outside air is sufficiently low, there is a problem that efficient dehumidification is not performed.
  • the present invention has been made in view of such a background, and an object of the present invention is to perform efficient dehumidification.
  • the present invention is characterized in that the bypass of the total heat exchanger of the air and the bypass of the desiccant rotor are controlled by the enthalpy and humidity of the outside air.
  • FIG. 1 It is a figure showing an example of composition of a desiccant air-conditioning system concerning a 1st embodiment. It is a figure which shows the structural example of the control apparatus of the desiccant air conditioning system which concerns on 1st Embodiment. It is a flowchart which shows the process sequence of the path
  • FIG. 3 which shows the path
  • FIG. (The 4) which shows the path
  • FIG. 2 which shows the state transition of the air which concerns on 1st Embodiment.
  • the 3) which shows the state transition of the air which concerns on 1st Embodiment.
  • FIG. (The 4) which shows the state transition of the air which concerns on 1st Embodiment.
  • It is a flowchart which shows the process sequence of the air volume control in the control apparatus of the desiccant air-conditioning system which concerns on 2nd Embodiment.
  • FIG. 1 is a diagram illustrating a configuration example of a desiccant air conditioning system according to the first embodiment.
  • the desiccant air conditioning system 1 includes a desiccant external air conditioner 10, an internal air conditioner 20, a control device (control means) 30, and a refrigerator 40.
  • the right side of the page is the indoor side
  • the left side of the page is the outdoor side.
  • the desiccant air conditioner 10 is mainly for dehumidifying the outside air, and includes a first air supply fan 14, a total heat exchanger 11, a first cooling coil (cooler) 12, a desiccant rotor 13, and the like. Yes.
  • outdoor air is referred to as “outside air”
  • air passing through the desiccant air conditioning system 1 is referred to as “air”.
  • a first air supply fan 14, a total heat exchanger 11, a first cooling coil 12, and a desiccant rotor 13 are installed in this order from the outdoor side.
  • the desiccant air conditioner 10 also has a main air path 17 a that passes through the first air supply fan 14, the total heat exchanger 11, the first cooling coil 12, and the desiccant rotor 13.
  • the desiccant air conditioner 10 has a first bypass path 17b that is connected to the main path 17a at the rear stage of the first air supply fan 14 and the rear stage of the total heat exchanger 11, and bypasses the total heat exchanger 11. is doing.
  • the desiccant air conditioner 10 includes a second bypass path 17 c that is connected to the main path 17 a at the rear stage of the first cooling coil 12 and the rear stage of the desiccant rotor 13 and bypasses the desiccant rotor 13.
  • the desiccant air conditioner 10 has an exhaust fan 15 for exhausting indoor air. After the indoor air passes through the exhaust fan 15, it is exhausted to the outdoors via the desiccant rotor 13 and the total heat exchanger 11.
  • the total heat exchanger 11 is made of paper or the like, and exchanges heat and moisture between air passing through itself and exhaust.
  • a refrigerator 40 is connected to the first cooling coil 12.
  • the first cooling coil 12 performs sensible heat treatment by lowering the temperature of the passing air, but mainly performs latent heat treatment, that is, moisture removal.
  • the 1st cooling coil 12 performs heat exchange with distribution
  • the desiccant rotor 13 has a disk shape and has a dehumidifying agent or desiccant such as lithium chloride, silica gel, or zeolite.
  • the desiccant rotor 13 can be rotated around a central axis by a rotation motor (not shown). By this rotation, the desiccant rotor 13 circulates and passes through the dehumidification area and the regeneration area.
  • a relatively high humidity air is supplied from the first cooling coil 12 to the dehumidifying area.
  • relatively dry (low humidity) air is supplied from the room to the regeneration area via the exhaust fan 15.
  • the desiccant rotor 13 absorbs the humidity of the outside air that could not be dehumidified by the total heat exchanger 11 and the first cooling coil 12 in the dehumidifying area. Further, the desiccant rotor 13 is dehumidified by releasing moisture from the dehumidifier or the desiccant by the relatively dry (low humidity) air supplied from the room via the exhaust fan 15 in the regeneration area. The agent or desiccant can absorb moisture again.
  • the main path 17 a is provided with a first damper 16 a (first switch) that switches between blocking and passing air to the total heat exchanger 11 at a stage preceding the total heat exchanger 11.
  • the main path 17 a is provided with a third damper 16 c (second switch) for adjusting the flow rate of air to the desiccant rotor 13 in front of the desiccant rotor 13.
  • the first bypass path 17b is provided with a second damper 16b (first switch) that switches between blocking and passing air in the first bypass path 17b.
  • the second bypass path 17c is provided with a fourth damper 16d (second switch) for adjusting the air flow rate in the second bypass path 17c.
  • the first damper 16a and the second damper 16b are, in principle, only “fully open” or “fully closed”, but the opening degree of the third damper 16c and the fourth damper 16d can be adjusted.
  • the internal air conditioner 20 is mainly for cooling the air dehumidified by the desiccant external air conditioner 10 and supplying it to the room, and has a second cooling coil 21 and a second air supply fan 22. . Although it is preferable to arrange the second cooling coil 21 and the second air supply fan 22 in the order from the desiccant air conditioner 10 in order of proximity, they may not be arranged in this order.
  • a refrigerator 40 is connected to the second cooling coil 21.
  • the second cooling coil 21 mainly performs sensible heat treatment of the passing air.
  • the air supplied to the second cooling coil 21 is a mixture of part of the indoor air (return air) and low-humidity air supplied from the desiccant external air conditioner 10.
  • the second air supply fan 22 supplies the air cooled by the second cooling coil 21 into the room.
  • thermometer 51 A thermometer 51, a first hygrometer 52, and the like are installed outdoors, and a second hygrometer 53 for calculating absolute humidity and a thermometer (or a dew point meter) not shown are installed at the outlet of the first cooling coil 12. Has been.
  • the control device 30 Based on information obtained from the thermometer 51, the first hygrometer 52, the second hygrometer 53, a thermometer (not shown), a hygrometer, and the like installed in the room, the control device 30 performs the first dampers 16a to 16a. It controls the opening / closing and opening of the fourth damper 16d, and is a PLC (Programmable Logic Controller) or the like. The input / output information of the control device 30 is indicated by fine broken line arrows.
  • FIG. 2 is a diagram illustrating a configuration example of a control device of the desiccant air conditioning system according to the first embodiment.
  • the control device 30 includes a memory 310, a CPU (Central Processing Unit) 320, and a storage device 330.
  • the program stored in the storage device 330 is expanded and executed by the CPU 320, whereby the processing unit 311, the acquisition unit 312, the calculation unit 313, the determination unit 314, and the damper control that configure the processing unit 311 are controlled.
  • Part 315 is embodied.
  • the acquisition unit 312 acquires information from the thermometer 51, the first hygrometer 52, the second hygrometer 53, and the like.
  • the calculation unit 313 calculates various values necessary for controlling the desiccant air conditioning system 1.
  • the determination unit 314 performs various determinations in the control of the desiccant air conditioning system 1.
  • the damper control unit 315 controls the opening / closing and opening of the first damper 16a to the fourth damper 16d according to the result of the determination unit 314.
  • FIG. 3 is a flowchart illustrating a route control processing procedure in the control device of the desiccant air conditioning system according to the first embodiment.
  • 4 to 7 are diagrams showing air paths in the desiccant air conditioning system according to the first embodiment. 4 to 7 are the same as those in FIG. 1, description of each element is omitted.
  • the enthalpy of outside air is referred to as outside air enthalpy
  • the calculation unit 313 of the control device 30 calculates the absolute humidity of the outside air (outside air absolute humidity) from the humidity information and temperature information obtained by the acquisition unit 312 from the thermometer 51 and the first hygrometer 52. (S102).
  • the absolute humidity of the outside air is referred to as the outside air absolute humidity.
  • the determination unit 314 of the control device 30 determines whether or not the outdoor air absolute humidity is higher than the absolute humidity required at the outlet of the desiccant external air conditioner 10 (hereinafter, referred to as required absolute humidity) (S111).
  • the required absolute humidity is a value that is manually input to the control device 30 in advance.
  • the damper control unit 315 of the control device 30 closes the first damper 16a and the third damper 16c, and the second damper 16b and the fourth damper. 16d is opened (S112), and the processing unit 311 ends the process.
  • the damper control unit 315 fully closes the third damper 16c and fully opens the fourth damper 16d.
  • the air is sent in the order of the first bypass path 17b ⁇ the first cooling coil 12 ⁇ the second bypass path 17c, as indicated by the thick arrow in FIG. That is, when the outside air absolute humidity is equal to or lower than the required absolute humidity, it is not necessary to dehumidify the outside air, so that air does not pass through the total heat exchanger 11 and the desiccant rotor 13.
  • the first cooling coil 12 mainly has a role of lowering the temperature of the air.
  • step S111 When the outside absolute humidity is higher than the required absolute humidity in step S111 (S111 ⁇ Yes), the determination unit 314 of the control device 30 determines whether the outside air enthalpy is lower than the return air enthalpy (S121).
  • step S121 when the outside air enthalpy is equal to or greater than the return air enthalpy (S121 ⁇ No), the damper control unit 315 of the control device 30 opens the first damper 16a and the third damper 16c, and the second damper 16b and the fourth damper 16d. Is closed (S122), and the processing unit 311 ends the processing. At this time, the damper control unit 315 fully opens the third damper 16c and fully closes the fourth damper 16d.
  • the air is sent in the order of the total heat exchanger 11 ⁇ the first cooling coil 12 ⁇ the desiccant rotor 13 as indicated by the thick arrows in FIG. That is, in the case of “No” in step S121, since the absolute humidity and enthalpy of the outside air are high, the control device 30 is sufficient using the total heat exchanger 11, the first cooling coil 12, and the desiccant rotor 13. Dehumidify.
  • step S121 when the outside air enthalpy is lower than the return air enthalpy (S121 ⁇ Yes), the determination unit 314 of the control device 30 determines the absolute humidity at the outlet of the first cooling coil 12 during the rated operation (cooling coil outlet). It is determined whether it is lower than (absolute humidity) (S131).
  • the cooling coil outlet absolute humidity may be a value acquired from the second hygrometer 53 when the first cooling coil 12 is performing a rated operation, or may be a value input and set in the control device 30 by manual input in advance. Good.
  • the absolute humidity at the outlet of the first cooling coil 12 is a boundary condition because the dehumidifying ability of the desiccant rotor 13 is the boundary condition. In other words, in order to use the dehumidifying capacity of the desiccant rotor 13 as a boundary condition, the absolute humidity at the outlet of the first cooling coil 12 is used as the boundary condition.
  • step S131 when the outside air absolute humidity is equal to or higher than the cooling coil outlet absolute humidity (S131 ⁇ No), the damper control unit 315 of the control device 30 closes the first damper 16a and the fourth damper 16d, and the second damper 16b and the third damper 16b.
  • the damper 16c is opened (S132).
  • the processing unit 311 ends the processing.
  • the damper control unit 315 fully opens the third damper 16c and fully closes the fourth damper 16d.
  • the air is sent in the order of the first bypass path 17b ⁇ the first cooling coil 12 ⁇ the desiccant rotor 13 as indicated by the thick arrows in FIG. That is, in the case of “No” in step S ⁇ b> 131, the control device 30 performs dehumidification using the first cooling coil 12 and the desiccant rotor 13 without using the total heat exchanger 11.
  • step S131 when the outside air absolute humidity is lower than the cooling coil outlet absolute humidity (S131 ⁇ Yes), the damper control unit 315 of the control device 30 closes the first damper 16a, opens the second damper 16b, opens the third damper 16c, and The fourth damper 16d is opened at a predetermined opening (S141). Thereafter, the processing unit 311 ends the processing. As a result, the air is sent in the order of the first bypass path 17b ⁇ the first cooling coil 12 ⁇ the desiccant rotor 13 and the second bypass path 17c as shown by the thick arrows in FIG.
  • the amount of air passing through the desiccant rotor 13 and the second bypass path 17c becomes a predetermined flow rate according to the opening degree of the third damper 16c and the fourth damper 16d.
  • the damper control unit 315 decreases the opening of the third damper 16c and increases the opening of the fourth damper 16d.
  • the damper control unit 315 increases the opening of the third damper 16c and decreases the opening of the fourth damper 16d.
  • the air is mixed with the return air from the room at the outlet of the desiccant air conditioner 10, and then the temperature is lowered by sensible heat treatment in the second cooling coil 21. Supplied indoors.
  • FIG. 8 is a diagram showing division of regions according to the state of the outside air in the desiccant air conditioning system of the present embodiment in the air diagram. Since each axis and each line in FIG. 8 conforms to a general air diagram, description thereof is omitted.
  • the “dry bulb temperature” on the horizontal axis in the air diagrams of FIGS. 8 to 12 is the “temperature” in the present embodiment.
  • the air state is divided into regions 801 to 804 by lines L1 to L3.
  • the line L1 is a line indicating the absolute humidity (required absolute humidity) preset by the administrator.
  • a point 811 is a point indicating the state of return air
  • a line L2 including the point 811 is a line indicating an isoenthalpy (return air enthalpy) with the return air
  • a line L3 is a line indicating the absolute humidity at the outlet of the first cooling coil 12 during the rated operation (cooling coil outlet absolute humidity).
  • a region where the absolute humidity is equal to or lower than the absolute humidity indicated by the line L1 is referred to as a region 801.
  • a region where the absolute humidity is higher than the absolute humidity indicated by the line L1 and the enthalpy is equal to or higher than the enthalpy indicated by the line L2 is referred to as a region 802.
  • a region where the enthalpy is lower than the enthalpy indicated by the line L2 and the absolute humidity is equal to or higher than the absolute humidity indicated by the line L3 is referred to as a region 803.
  • a region where the enthalpy is lower than the enthalpy indicated by the line L2, the absolute humidity is lower than the absolute humidity indicated by L3, and is higher than the absolute humidity indicated by the line L1, is referred to as a region 804.
  • FIG. 9 is a state transition diagram illustrating a case where the state of the outside air is in the region indicated by region 801, and corresponds to the case where “No” is determined in step S111 of FIG. That is, if the outside air is in the state indicated by the point 901, the air is sent in the order of the first bypass path 17b ⁇ the first cooling coil 12 ⁇ the second bypass path 17c, as indicated by the thick arrow in FIG. . First, in the first cooling coil 12, the air transitions from a point 901 to a point 902 because the temperature can be lowered. In this case, only the sensible heat treatment is performed in the first cooling coil 12.
  • the air is mixed with the return air in the state of the point 903 (the same state as the point 811 in FIG. 8) to be in the state of the point 904. Further, the temperature of the air is lowered by the second cooling coil 21 in the internal air conditioner 20 to a state of a point 905, and the air is supplied into the room. That is, only the sensible heat treatment is performed in the second cooling coil 21.
  • the desiccant air-conditioning system 1 does not use the total heat exchanger 11 and the desiccant rotor 13, thereby reducing pressure loss and eliminating wasteful energy loss.
  • FIG. 10 is a state transition diagram showing a case where the state of the outside air is in the region indicated by region 802, which corresponds to the case where “No” is determined in step S121 of FIG.
  • the air is sent in the order of the total heat exchanger 11 ⁇ the first cooling coil 12 ⁇ the desiccant rotor 13 as indicated by the thick arrow in FIG.
  • the temperature of the air is lowered by the total heat exchanger 11, and the air transitions to the state of the point 1002. Further, the air is further lowered in temperature and absolute humidity by the first cooling coil 12, and transitions to the state of the point 1003.
  • the absolute humidity is further lowered, and the state transitions to the state of the point 1004.
  • the temperature of the point 1004 after passing through the desiccant rotor 13 is higher than the temperature of the point 1003.
  • the air is mixed with the return air in the state of the point 1005 (the same state as the point 811 in FIG. 8) to be in the state of the point 1006. Further, the temperature of the air is lowered by the second cooling coil 21 in the internal air conditioner 20 to a state of a point 1007, and the air is supplied into the room. That is, only the sensible heat treatment is performed in the second cooling coil 21.
  • the desiccant air conditioning system 1 performs dehumidification by the total heat exchanger 11, the cooling coil 12, and the desiccant rotor 13 when the enthalpy and absolute humidity of the outside air are sufficiently high.
  • the chiller 40 can be set at a higher chilled water temperature than in the case of only ordinary cooling and dehumidification.
  • COP Coefficient Of Performance
  • FIG. 11 is a state transition diagram illustrating a case where the state of the outside air is in the region indicated by region 803, which corresponds to the case where “No” is determined in step S131 of FIG.
  • the air is sent in the order of the first bypass path 17b ⁇ the first cooling coil 12 ⁇ the desiccant rotor 13 as indicated by the thick arrow in FIG.
  • the air is lowered in temperature and absolute humidity by the first cooling coil 12, and transitions to the state of the point 1102.
  • the absolute humidity is further lowered, and the state transitions to the state of the point 1103.
  • the temperature of the point 1103 after passing through the desiccant rotor 13 is higher than the temperature of the point 1102.
  • the air is mixed with the return air in the state of the point 1104 (the same state as the point 811 in FIG. 8) and becomes the state of the point 1105. Further, the temperature of the air is lowered by the second cooling coil 21 in the internal air conditioner 20 to a state of a point 1106, and the air is supplied into the room. That is, only the sensible heat treatment is performed in the second cooling coil 21.
  • the indoor enthalpy is higher than the enthalpy of the outside air. Therefore, if the enthalpy is replaced by the total heat exchanger 11, the enthalpy of the air rises, and the enthalpy lowering process that is not necessary originally becomes necessary. As shown in FIG. 6, since air does not pass through the total heat exchanger 11, unnecessary enthalpy lowering processing can be avoided, and the efficiency of the desiccant air conditioning system 1 can be improved.
  • FIG. 12 is a state transition diagram illustrating a case where the state of the outside air is in the region indicated by region 804, and corresponds to the case where “Yes” is determined in step S131 of FIG.
  • the air flows from the first bypass path 17b ⁇ the first cooling coil 12 ⁇ the desiccant rotor 13 and the second bypass path 17c as shown by the thick arrows in FIG. Sent in the order.
  • a part of the air passes through the desiccant rotor 13 and the rest passes through the second bypass path 17c.
  • the temperature of the air is lowered by the first cooling coil 12, and the air transitions to the state of the point 1202. Note that only the sensible heat treatment is performed in the first cooling coil 12.
  • the air is mixed with the return air in the state of the point 1205 (the same state as the point 811 in FIG. 8) and becomes the state of the point 1206. Further, the temperature of the air is lowered by the second cooling coil 21 in the internal air conditioner 20 to a state of a point 1207, and the air is supplied into the room. That is, only the sensible heat treatment is performed in the second cooling coil 21.
  • the absolute humidity of the outside air is relatively low.
  • the air is allowed to pass through the desiccant rotor 13
  • by not allowing all the air to pass through the desiccant rotor 13 it is possible to avoid excessive dehumidification, reduce the pressure loss, and enable an energy efficient operation.
  • the control device 30 in the desiccant air conditioning system 1 according to the first embodiment controls the air passing through the main path 17a, the first bypass path 17b, and the second bypass path 17c in accordance with the enthalpy and absolute humidity state of the outside air. Do. By doing in this way, control of the desiccant air conditioning system 1 according to the enthalpy and humidity of external air becomes possible efficiently.
  • control device 30 of the desiccant air conditioning system 1 allows the air to flow when the absolute humidity of the outside air is lower than the absolute humidity required for the outlet of the desiccant external air conditioner 10 (that is, the outlet of the desiccant rotor 13).
  • the first switch (first damper 16a and second damper 16b) and the second switch (third damper 16c and fourth damper 16d) are controlled to bypass the total heat exchanger 11 and the desiccant rotor 13.
  • the control device 30 performs control so that the total heat exchanger 11 and the desiccant rotor 13 are not used, so that useless energy loss can be eliminated.
  • control device 30 of the desiccant air-conditioning system 1 has a higher absolute humidity than the absolute humidity required for the outlet of the desiccant external air conditioner 10 (that is, the outlet of the desiccant rotor 13). Is higher than the return enthalpy, the first switch (first damper 16a, second damper 16b) and the second switch (third damper) so that the air passes through the total heat exchanger 11 and the desiccant rotor 13. 16c, the fourth damper 16d) is controlled.
  • the enthalpy and the absolute humidity are in a high state. Therefore, it is necessary to perform sufficient dehumidification.
  • the controller 30 performs dehumidification by the total heat exchanger 11 and the desiccant rotor 13, so that the temperature of the first cooling coil 12 is not lowered more than necessary. Accordingly, the COP of the refrigerator 40 that is cooling the first cooling coil 12 can be improved.
  • control device 30 of the desiccant air conditioning system 1 has a higher absolute humidity of the outside air than the absolute humidity required at the outlet of the desiccant air conditioner 10 (that is, the outlet of the desiccant rotor 13). Is lower than the return air enthalpy and the absolute humidity of the outside air is higher than the absolute humidity at the outlet of the first cooling coil 12 during rated operation, the air bypasses the total heat exchanger 11 and passes through the desiccant rotor 13. 1 switch (the 1st damper 16a, the 2nd damper 16b) and the 2nd switch (the 3rd damper 16c, the 4th damper 16d) are controlled.
  • control apparatus 30 of the desiccant air conditioning system 1 which concerns on this embodiment has the absolute humidity of external air higher than the absolute humidity requested
  • the first switch (the first damper 16a and the second damper 16b) and the second switch (the third damper 16c and the fourth damper 16d) are controlled to pass through.
  • the absolute humidity of the outside air is relatively low. In such a case, if all the air is allowed to pass through the desiccant rotor 13, there is a possibility that the air has a lower humidity than necessary. In the present embodiment, when the outside air is in such a state, it is possible to avoid excessive dehumidification by not allowing all the air to pass through the desiccant rotor 13.
  • control device 30 of the desiccant air-conditioning system 1 has a higher absolute humidity than the absolute humidity required for the outlet of the desiccant external air conditioner 10 (that is, the outlet of the desiccant rotor 13). Is lower than the return air enthalpy and the absolute humidity of the outside air is lower than the absolute humidity at the outlet of the first cooling coil 12 during rated operation, the higher the absolute humidity of the outside air, the more the amount of air passing through the desiccant rotor 13 Thus, the first switch (first damper 16a, second damper 16b) and the second switch (third damper 16c, fourth damper 16d) are controlled.
  • the controller 30 controls the first switch (the first damper 16a and the second damper 16b) and the second switch so that the amount of air passing through the second bypass path 17c increases as the absolute humidity of the outside air decreases.
  • Switch third damper 16c, fourth damper 16d.
  • the enthalpy and absolute humidity control the outside air state separately in the regions 801 to 804, but these regions are further divided by temperature (dry bulb temperature) and relative humidity. May be. By doing in this way, it can respond to a finer weather condition.
  • FIG. 13 is a diagram illustrating a configuration example of a desiccant air conditioning system according to the second embodiment.
  • the same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.
  • the right side of the page is the indoor side
  • the left side of the page is the outdoor side.
  • the desiccant air conditioning system 1a according to the second embodiment differs from the desiccant air conditioning system 1 according to the first embodiment as follows.
  • control device 30a controls the inverters 61 to 63 in the first air supply fan 14, the second air supply fan 22, and the exhaust fan 15 based on the indoor state value 71, whereby the first air supply fan 14, This is to control the rotation speed of the second air supply fan 22 and the exhaust fan 15.
  • the indoor state value 71 will be described later.
  • FIG. 14 is a diagram illustrating a configuration example of a control device of the desiccant air conditioning system according to the second embodiment. Reference is made to FIG. 13 as appropriate.
  • the control device 30a shown in FIG. 14 is different from the control device 30 shown in FIG. 2 in that the processing unit 311a is based on the indoor state value 71 in the first supply fan 14, the second supply fan 22, and the exhaust fan 15.
  • the inverter control unit 316 that controls the inverters 61 to 63 is provided.
  • the inverter control unit 316 is realized by a program stored in the storage device 330 being expanded in the memory 310 and executed by the CPU 320.
  • FIG. 15 is a flowchart showing a processing procedure of air volume control in the control device of the desiccant air conditioning system according to the second embodiment. Reference is made to FIGS. 13 and 14 as appropriate.
  • the acquisition unit 312 of the control device 30a acquires the indoor state value 71 (S201), and calculates the indoor condition value based on the indoor state value 71 acquired by the calculation unit 313 as necessary (S202).
  • the indoor state value 71 is the number of computers operating indoors
  • the indoor condition value is the number of indoors calculated based on the number of computers operating.
  • the calculation unit 313 of the control device 30a multiplies the number of people in the room condition value by a preset constant value “required outside air intake amount per person (m 3 / (h ⁇ person)”. Thus, the outside air intake amount is calculated (S203).
  • the calculation unit 313 of the control device 30a calculates the sensible heat load per person (W / person) generated by a person in the room and the person-generated sensible heat load (W) that is the product of the number of persons in the room. calculate. Furthermore, the calculation unit 313 calculates a device-generated sensible heat load (W) that is a product of the sensible heat load (W / m 2 ) per unit floor area due to lighting, an outlet, and the like, and the floor area.
  • the sensible heat load per person and the sensible heat load per unit floor area are preset constant values.
  • the calculation part 313 of the control apparatus 30a calculates the sensible heat load amount (W) which the desiccant air conditioning system 1a should process by adding a human generation
  • the sensible heat load to be processed is the amount of heat generated in the room to be subjected to the sensible heat treatment in order to keep the room temperature at the set temperature.
  • the calculation unit 313 of the control device 30a calculates the supply air volume by the following equation (1) (S205).
  • “3600” is unit conversion from second to time (s / h).
  • “Cp” is a constant pressure specific heat ( ⁇ 1006 J / (kg ⁇ K))
  • ⁇ is an air density ( ⁇ 1.2 kg / m 3 )
  • “ ⁇ t” is a supply air blowing temperature and an indoor temperature. (° C).
  • the inverter control unit 316 of the control device 30a controls the inverters 61 to 63 in the first supply fan 14, the second supply fan 22, and the exhaust fan 15 based on the calculated supply air volume (S206).
  • the inverter control unit 316 controls the inverter 61 that drives the first air supply fan 14 based on the outside air intake amount calculated in step S203.
  • the inverter control unit 316 controls the inverter 63 that drives the second air supply fan 22 based on the air supply air amount calculated in step S205.
  • the inverter control unit 316 controls the inverter 62 that drives the exhaust fan 15 based on the outside air intake amount calculated in step S203.
  • FIG. 16 shows an example of the relationship between the number of people in the room and the outside air volume, the supply air volume, and the return air volume when the latent heat load in the room is large.
  • the horizontal axis indicates the number of people in the room, and the vertical axis indicates the air volume.
  • Reference numeral 1602 denotes a line indicating the supply air volume, which is the air volume of the second supply fan 22.
  • Reference numeral 1603 is a line indicating the return air volume.
  • Each plot is a calculated value by simulation.
  • the unit of the outside air volume is converted to “m 3 / h”.
  • the influence of heat generated by a device such as an indoor computer is not considered.
  • a line 1611 is the number of persons set at the time of designing the desiccant air conditioning system 1a.
  • the increase amount of the supply air volume accompanying the increase in the number of persons becomes more gradual than the increase amount of the outside air volume. Therefore, the return air volume (line 1603), which is the difference between the supply air volume (line 1602) and the outside air volume (line 1601), decreases as the number of people in the room increases.
  • the desiccant air conditioning system 1a of the second embodiment can operate the second air supply fan 22 in accordance with the indoor state. By doing in this way, also in desiccant air-conditioning system 1a, it becomes possible to operate efficiently according to the state of a room. Furthermore, by determining the supply air volume using the equation (1), it is possible to determine the appropriate supply air volume more accurately. Then, by using the indoor sensible heat and latent heat load, for example, the number of people in the room as the indoor conditions, it is possible to operate the appropriate desiccant air conditioning system 1a according to the number of people in the room.
  • the air supply air volume of the second air supply fan 22 is calculated based on the number of people in the room and the amount of heat generated by the device.
  • the present invention is not limited to this and is calculated in consideration of humidity and the like. May be.
  • the calculation of the number of people in the room may be performed by a scale or the like installed on the floor.
  • the control device 30a may hold data in which a computer used by an individual is associated with the weight of the individual.
  • the calculation unit 313 of the control device 30a calculates the heat generation amount of the person from the computer that is turned on and the weight of the person using the computer, and the desiccant air conditioning system based on the heat generation amount.
  • the sensible heat load to be processed by 1a may be calculated.
  • the present invention is not limited to the above-described embodiment, and includes various modifications.
  • the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to having all the configurations described.
  • a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment.
  • each of the above-described configurations, functions, units 311 to 316, storage device 330, and the like may be realized by hardware by designing a part or all of them, for example, with an integrated circuit.
  • the above-described configurations, functions, and the like may be realized by software by a processor such as the CPU 320 interpreting and executing a program that realizes each function.
  • control lines and information lines are those that are considered necessary for explanation, and not all control lines and information lines are necessarily shown on the product. In practice, it can be considered that almost all configurations are connected to each other.

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  • Chemical & Material Sciences (AREA)
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Abstract

In order to perform efficient dehumidification, this system is characterized by comprising: a total heat exchanger; a desiccant rotor; a main path through which air passes via the total heat exchanger, a cooling coil, and the desiccant rotor; a first bypass path that is connected to the main path in the front and rear of the total heat exchanger, and by which air bypasses the total heat exchanger; a second bypass path that is connected to the main path in the front and rear of the desiccant rotor, and by which air bypasses the desiccant rotor; and a control device that controls the air passing through the main path, the first bypass path, and the second bypass path on the basis of the enthalpy and humidity of outside air.

Description

デシカント空調システム及びデシカント空調システムの制御方法Desiccant air conditioning system and control method of desiccant air conditioning system
　本発明は、デシカントロータによる除湿を行うデシカント空調システム及びデシカント空調システムの制御方法の技術に関する。 The present invention relates to a desiccant air conditioning system that performs dehumidification by a desiccant rotor and a technique of a control method for the desiccant air conditioning system.
　乾燥剤や、除湿剤を用いることで、冷媒を用いることなく除湿や、減湿を行うデシカントロータを備えたデシカント空調機がある。
　このようなデシカント空調機について、特許文献１，２に記載の技術が開示されている。特許文献１，２には、外気の湿度や、温度の状態に応じて、給気の経路を切り換える低温再生デシカント空調機が記載されている。 There is a desiccant air conditioner equipped with a desiccant rotor that performs dehumidification and dehumidification without using a refrigerant by using a desiccant or a dehumidifying agent.
With respect to such a desiccant air conditioner, techniques described in Patent Documents 1 and 2 are disclosed. Patent Documents 1 and 2 describe a low-temperature regeneration desiccant air conditioner that switches a supply air path according to the humidity and temperature of the outside air.
特開２０１２－１４５２４７号公報JP 2012-145247 A 特開２０１１－２４２１１７号公報JP 2011-242117 A
　特許文献１，２に記載の技術は、エンタルピのみで制御モード（冷房モード、暖房モード）を切り換えている。このため、特許文献１，２に記載の技術は、外気の湿度が十分に低い場合でも除湿を行ってしまうため、効率的な除湿を行っていないという課題がある。 The techniques described in Patent Documents 1 and 2 switch the control mode (cooling mode or heating mode) only by enthalpy. For this reason, since the techniques described in Patent Documents 1 and 2 perform dehumidification even when the humidity of the outside air is sufficiently low, there is a problem that efficient dehumidification is not performed.
　このような背景に鑑みて本発明がなされたのであり、本発明は、効率的な除湿を行うことを課題とする。 The present invention has been made in view of such a background, and an object of the present invention is to perform efficient dehumidification.
　前記した課題を解決するため、本発明は、外気のエンタルピ及び湿度によって、エアの全熱交換器の迂回や、デシカントロータの迂回を制御することを特徴とする。 In order to solve the above-mentioned problems, the present invention is characterized in that the bypass of the total heat exchanger of the air and the bypass of the desiccant rotor are controlled by the enthalpy and humidity of the outside air.
　本発明によれば、効率的な除湿を行うことができる。 According to the present invention, efficient dehumidification can be performed.
第１実施形態に係るデシカント空調システムの構成例を示す図である。It is a figure showing an example of composition of a desiccant air-conditioning system concerning a 1st embodiment. 第１実施形態に係るデシカント空調システムの制御装置の構成例を示す図である。It is a figure which shows the structural example of the control apparatus of the desiccant air conditioning system which concerns on 1st Embodiment. 第１実施形態に係るデシカント空調システムの制御装置における経路制御の処理手順を示すフローチャートである。It is a flowchart which shows the process sequence of the path | route control in the control apparatus of the desiccant air conditioning system which concerns on 1st Embodiment. 第１実施形態に係るデシカント空調システムにおけるエアの経路を示す図（その１）である。It is a figure (the 1) which shows the path | route of the air in the desiccant air-conditioning system which concerns on 1st Embodiment. 第１実施形態に係るデシカント空調システムにおけるエアの経路を示す図（その２）である。It is FIG. (2) which shows the path | route of the air in the desiccant air conditioning system which concerns on 1st Embodiment. 第１実施形態に係るデシカント空調システムにおけるエアの経路を示す図（その３）である。It is FIG. (The 3) which shows the path | route of the air in the desiccant air conditioning system which concerns on 1st Embodiment. 第１実施形態に係るデシカント空調システムにおけるエアの経路を示す図（その４）である。It is FIG. (The 4) which shows the path | route of the air in the desiccant air-conditioning system which concerns on 1st Embodiment. 第１実施形態に係るデシカント空調システムにおける外気の状態による領域の分割を示す図である。It is a figure which shows the division | segmentation of the area | region by the state of the external air in the desiccant air conditioning system which concerns on 1st Embodiment. 第１実施形態に係るエアの状態遷移を示す図（その１）である。It is a figure (the 1) which shows the state transition of the air which concerns on 1st Embodiment. 第１実施形態に係るエアの状態遷移を示す図（その２）である。It is FIG. (2) which shows the state transition of the air which concerns on 1st Embodiment. 第１実施形態に係るエアの状態遷移を示す図（その３）である。It is FIG. (The 3) which shows the state transition of the air which concerns on 1st Embodiment. 第１実施形態に係るエアの状態遷移を示す図（その４）である。It is FIG. (The 4) which shows the state transition of the air which concerns on 1st Embodiment. 第２実施形態に係るデシカント空調システムの構成例を示す図である。It is a figure which shows the structural example of the desiccant air conditioning system which concerns on 2nd Embodiment. 第２実施形態に係るデシカント空調システムの制御装置の構成例を示す図である。It is a figure which shows the structural example of the control apparatus of the desiccant air conditioning system which concerns on 2nd Embodiment. 第２実施形態に係るデシカント空調システムの制御装置における風量制御の処理手順を示すフローチャートである。It is a flowchart which shows the process sequence of the air volume control in the control apparatus of the desiccant air-conditioning system which concerns on 2nd Embodiment. 第２実施形態に係る室内の人数と、外気風量、給気風量、還気風量の関係を示す図である。It is a figure which shows the relationship between the number of persons in the room which concerns on 2nd Embodiment, and external air volume, supply air volume, and return air volume.
　次に、本発明を実施するための形態（「実施形態」という）について、適宜図面を参照しながら詳細に説明する。 Next, modes for carrying out the present invention (referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate.
《第１実施形態》
［デシカント空調システム］
　図１は、第１実施形態に係るデシカント空調システムの構成例を示す図である。
　デシカント空調システム１は、デシカント外調機１０と、内調機２０と、制御装置（制御手段）３０と、冷凍機４０とを有している。なお、図１において、紙面右側が室内側であり、紙面左側が屋外側である。 << First Embodiment >>
[Desicant air conditioning system]
FIG. 1 is a diagram illustrating a configuration example of a desiccant air conditioning system according to the first embodiment.
The desiccant air conditioning system 1 includes a desiccant external air conditioner 10, an internal air conditioner 20, a control device (control means) 30, and a refrigerator 40. In FIG. 1, the right side of the page is the indoor side, and the left side of the page is the outdoor side.
［デシカント外調機］
　デシカント外調機１０は、主に外気を除湿するためのものであり、第１給気ファン１４、全熱交換器１１、第１冷却コイル（冷却器）１２、デシカントロータ１３等を有している。なお、本実施形態では、屋外の空気を「外気」と称し、デシカント空調システム１内を通過する空気を「エア」と称することとする。デシカント外調機１０では、屋外側から順に、第１給気ファン１４、全熱交換器１１、第１冷却コイル１２、デシカントロータ１３が設置される。 [Desicant air conditioner]
The desiccant air conditioner 10 is mainly for dehumidifying the outside air, and includes a first air supply fan 14, a total heat exchanger 11, a first cooling coil (cooler) 12, a desiccant rotor 13, and the like. Yes. In the present embodiment, outdoor air is referred to as “outside air”, and air passing through the desiccant air conditioning system 1 is referred to as “air”. In the desiccant air conditioner 10, a first air supply fan 14, a total heat exchanger 11, a first cooling coil 12, and a desiccant rotor 13 are installed in this order from the outdoor side.
　また、デシカント外調機１０は、第１給気ファン１４、全熱交換器１１、第１冷却コイル１２、デシカントロータ１３を経由するエアのメイン経路１７ａを有している。そして、デシカント外調機１０は、第１給気ファン１４の後段と、全熱交換器１１の後段とでメイン経路１７ａに接続し、全熱交換器１１を迂回する第１バイパス経路１７ｂを有している。さらに、デシカント外調機１０は、第１冷却コイル１２の後段と、デシカントロータ１３の後段とでメイン経路１７ａに接続し、デシカントロータ１３を迂回する第２バイパス経路１７ｃを有する。 The desiccant air conditioner 10 also has a main air path 17 a that passes through the first air supply fan 14, the total heat exchanger 11, the first cooling coil 12, and the desiccant rotor 13. The desiccant air conditioner 10 has a first bypass path 17b that is connected to the main path 17a at the rear stage of the first air supply fan 14 and the rear stage of the total heat exchanger 11, and bypasses the total heat exchanger 11. is doing. Further, the desiccant air conditioner 10 includes a second bypass path 17 c that is connected to the main path 17 a at the rear stage of the first cooling coil 12 and the rear stage of the desiccant rotor 13 and bypasses the desiccant rotor 13.
　また、デシカント外調機１０は、室内の空気を排気するための排気ファン１５を有している。室内の空気は、排気ファン１５を介した後、デシカントロータ１３、全熱交換器１１を経由して屋外へ排気される。 The desiccant air conditioner 10 has an exhaust fan 15 for exhausting indoor air. After the indoor air passes through the exhaust fan 15, it is exhausted to the outdoors via the desiccant rotor 13 and the total heat exchanger 11.
　全熱交換器１１は、紙等からなり、自身を通過するエアと排気との間で熱及び湿気を交換する。
　第１冷却コイル１２には、冷凍機４０が接続されている。第１冷却コイル１２は、通過するエアの温度を下げることで顕熱処理も行うが、潜熱処理、すなわち、湿気の除去を主に行うものである。具体的には、第１冷却コイル１２は、冷凍機４０で冷却された冷却水とエアとの間で熱交換をした熱媒（流体）を循環させることによって流通エアとの熱交換を行う。 The total heat exchanger 11 is made of paper or the like, and exchanges heat and moisture between air passing through itself and exhaust.
A refrigerator 40 is connected to the first cooling coil 12. The first cooling coil 12 performs sensible heat treatment by lowering the temperature of the passing air, but mainly performs latent heat treatment, that is, moisture removal. Specifically, the 1st cooling coil 12 performs heat exchange with distribution | circulation air by circulating the heat medium (fluid) which heat-exchanged between the cooling water cooled with the refrigerator 40, and air.
　デシカントロータ１３は、円盤状のものであり、塩化リチウムや、シリカゲルや、ゼオライトといった除湿剤又は乾燥剤を有している。デシカントロータ１３は、図示しない回転モータによって中心軸を回転軸とする回転が可能である。この回転により、デシカントロータ１３は、除湿エリア、再生エリアを循環して通過する。除湿エリアには、比較的高湿度のエアが第１冷却コイル１２から供給されている。また、再生エリアには、比較的乾燥している（低湿度）エアが排気ファン１５を介して室内から供給されている。 The desiccant rotor 13 has a disk shape and has a dehumidifying agent or desiccant such as lithium chloride, silica gel, or zeolite. The desiccant rotor 13 can be rotated around a central axis by a rotation motor (not shown). By this rotation, the desiccant rotor 13 circulates and passes through the dehumidification area and the regeneration area. A relatively high humidity air is supplied from the first cooling coil 12 to the dehumidifying area. In addition, relatively dry (low humidity) air is supplied from the room to the regeneration area via the exhaust fan 15.
　デシカントロータ１３は、除湿エリアにおいて、全熱交換器１１と、第１冷却コイル１２で除湿しきれなかった外気の湿度を吸湿する。また、デシカントロータ１３は、再生エリアにおいて、排気ファン１５を介して室内から供給される、比較的乾燥している（低湿度）エアによって除湿剤又は乾燥剤から水分が放出されることで、除湿剤又は乾燥剤が再び吸湿可能となる。 The desiccant rotor 13 absorbs the humidity of the outside air that could not be dehumidified by the total heat exchanger 11 and the first cooling coil 12 in the dehumidifying area. Further, the desiccant rotor 13 is dehumidified by releasing moisture from the dehumidifier or the desiccant by the relatively dry (low humidity) air supplied from the room via the exhaust fan 15 in the regeneration area. The agent or desiccant can absorb moisture again.
　メイン経路１７ａには、全熱交換器１１へのエアの遮断・通過を切り換える第１ダンパ１６ａ（第１の切替器）が全熱交換器１１の前段に設けられている。また、メイン経路１７ａには、デシカントロータ１３へのエアの流量を調節する第３ダンパ１６ｃ（第２の切替器）がデシカントロータ１３の前段に設けられている。
　さらに、第１バイパス経路１７ｂには、第１バイパス経路１７ｂにおけるエアの遮断・通過を切り換える第２ダンパ１６ｂ（第１の切替器）が設けられている。そして、第２バイパス経路１７ｃには、第２バイパス経路１７ｃにおけるエアの流量を調節する第４ダンパ１６ｄ（第２の切替器）が設けられている。なお、第１ダンパ１６ａ及び第２ダンパ１６ｂは原則として「全開」もしくは「全閉」のみであるが、第３ダンパ１６ｃ及び第４ダンパ１６ｄは開度の調節が可能である。 The main path 17 a is provided with a first damper 16 a (first switch) that switches between blocking and passing air to the total heat exchanger 11 at a stage preceding the total heat exchanger 11. The main path 17 a is provided with a third damper 16 c (second switch) for adjusting the flow rate of air to the desiccant rotor 13 in front of the desiccant rotor 13.
Further, the first bypass path 17b is provided with a second damper 16b (first switch) that switches between blocking and passing air in the first bypass path 17b. The second bypass path 17c is provided with a fourth damper 16d (second switch) for adjusting the air flow rate in the second bypass path 17c. Note that the first damper 16a and the second damper 16b are, in principle, only “fully open” or “fully closed”, but the opening degree of the third damper 16c and the fourth damper 16d can be adjusted.
［内調機］
　内調機２０は、主にデシカント外調機１０で除湿されたエアを冷却して、室内に供給するためのものであり、第２冷却コイル２１及び第２給気ファン２２を有している。
　デシカント外調機１０から近い順に第２冷却コイル２１、第２給気ファン２２の順に配置されるのが好ましいが、この順に配置されなくてもよい。
　第２冷却コイル２１には、冷凍機４０が接続されている。第２冷却コイル２１は通過するエアの顕熱処理を主に行うものである。なお、第２冷却コイル２１に供給されるエアは、室内のエアの一部（還気）と、デシカント外調機１０から供給される低湿度のエアとが混合したものである。
　第２給気ファン２２は、第２冷却コイル２１で冷却されたエアを室内に供給する。 [Internal machine]
The internal air conditioner 20 is mainly for cooling the air dehumidified by the desiccant external air conditioner 10 and supplying it to the room, and has a second cooling coil 21 and a second air supply fan 22. .
Although it is preferable to arrange the second cooling coil 21 and the second air supply fan 22 in the order from the desiccant air conditioner 10 in order of proximity, they may not be arranged in this order.
A refrigerator 40 is connected to the second cooling coil 21. The second cooling coil 21 mainly performs sensible heat treatment of the passing air. The air supplied to the second cooling coil 21 is a mixture of part of the indoor air (return air) and low-humidity air supplied from the desiccant external air conditioner 10.
The second air supply fan 22 supplies the air cooled by the second cooling coil 21 into the room.
［各計測器］
　屋外には、温度計５１、第１湿度計５２等が設置され、第１冷却コイル１２の出口に絶対湿度を算出するための第２湿度計５３と図示しない温度計（又は露点計）が設置されている。 [Each measuring instrument]
A thermometer 51, a first hygrometer 52, and the like are installed outdoors, and a second hygrometer 53 for calculating absolute humidity and a thermometer (or a dew point meter) not shown are installed at the outlet of the first cooling coil 12. Has been.
［制御装置］
　制御装置３０は、温度計５１や、第１湿度計５２や、第２湿度計５３や、室内に設置された図示しない温度計、湿度計等から得られる情報を基に、第１ダンパ１６ａ～第４ダンパ１６ｄの開閉及び開度を制御するものでありＰＬＣ(Programmable logic controller：プログラマブルロジックコントローラ)等である。制御装置３０の入出力情報を、細かい破線矢印で示す。 [Control device]
Based on information obtained from the thermometer 51, the first hygrometer 52, the second hygrometer 53, a thermometer (not shown), a hygrometer, and the like installed in the room, the control device 30 performs the first dampers 16a to 16a. It controls the opening / closing and opening of the fourth damper 16d, and is a PLC (Programmable Logic Controller) or the like. The input / output information of the control device 30 is indicated by fine broken line arrows.
　図２は、第１実施形態に係るデシカント空調システムの制御装置の構成例を示す図である。適宜、図１を参照する。
　制御装置３０は、メモリ３１０、ＣＰＵ（Central Processing Unit）３２０及び記憶装置３３０を有している。
　メモリ３１０には、記憶装置３３０に格納されているプログラムが展開され、ＣＰＵ３２０によって実行されることで、処理部３１１、処理部３１１を構成する取得部３１２、算出部３１３、判定部３１４及びダンパ制御部３１５が具現化している。
　取得部３１２は、温度計５１、第１湿度計５２、第２湿度計５３等から情報を取得する。
　算出部３１３は、デシカント空調システム１の制御を行うために必要な各種値を算出する。
　判定部３１４は、デシカント空調システム１の制御における各種判定を行う。
　ダンパ制御部３１５は、判定部３１４の結果に応じて、第１ダンパ１６ａ～第４ダンパ１６ｄの開閉及び開度を制御する。 FIG. 2 is a diagram illustrating a configuration example of a control device of the desiccant air conditioning system according to the first embodiment. Reference is made to FIG. 1 as appropriate.
The control device 30 includes a memory 310, a CPU (Central Processing Unit) 320, and a storage device 330.
In the memory 310, the program stored in the storage device 330 is expanded and executed by the CPU 320, whereby the processing unit 311, the acquisition unit 312, the calculation unit 313, the determination unit 314, and the damper control that configure the processing unit 311 are controlled. Part 315 is embodied.
The acquisition unit 312 acquires information from the thermometer 51, the first hygrometer 52, the second hygrometer 53, and the like.
The calculation unit 313 calculates various values necessary for controlling the desiccant air conditioning system 1.
The determination unit 314 performs various determinations in the control of the desiccant air conditioning system 1.
The damper control unit 315 controls the opening / closing and opening of the first damper 16a to the fourth damper 16d according to the result of the determination unit 314.
［フローチャート］
　図３は、第１実施形態に係るデシカント空調システムの制御装置における経路制御の処理手順を示すフローチャートである。適宜、図１、図２を参照する。また、図４～図７は第１実施形態に係るデシカント空調システムにおけるエアの経路を示す図である。なお、図４～図７における各符号は図１と同様であるので、各要素の説明を省略する。
　まず、制御装置３０の算出部３１３は、取得部３１２が温度計５１や、第１湿度計５２や、図示しない室内の温度計、湿度計から取得した情報を基に、外気のエンタルピ及び室内のエンタルピ（＝還気のエンタルピ）といった各種エンタルピを算出する（Ｓ１０１）。以下、外気のエンタルピを外気エンタルピと称し、室内のエンタルピ（＝還気のエンタルピ）を還気エンタルピと称する。 [flowchart]
FIG. 3 is a flowchart illustrating a route control processing procedure in the control device of the desiccant air conditioning system according to the first embodiment. Reference is made to FIGS. 1 and 2 as appropriate. 4 to 7 are diagrams showing air paths in the desiccant air conditioning system according to the first embodiment. 4 to 7 are the same as those in FIG. 1, description of each element is omitted.
First, the calculation unit 313 of the control device 30 uses the information acquired by the acquisition unit 312 from the thermometer 51, the first hygrometer 52, an indoor thermometer and a hygrometer (not shown), Various enthalpies such as enthalpy (= return enthalpy) are calculated (S101). Hereinafter, the enthalpy of outside air is referred to as outside air enthalpy, and the indoor enthalpy (= enthalpy of return air) is referred to as return air enthalpy.
　次に、制御装置３０の算出部３１３は、取得部３１２が温度計５１や、第１湿度計５２から得た湿度の情報と温度情報等から、外気の絶対湿度（外気絶対湿度）を算出する（Ｓ１０２）。以下、外気の絶対湿度を外気絶対湿度と称する。 Next, the calculation unit 313 of the control device 30 calculates the absolute humidity of the outside air (outside air absolute humidity) from the humidity information and temperature information obtained by the acquisition unit 312 from the thermometer 51 and the first hygrometer 52. (S102). Hereinafter, the absolute humidity of the outside air is referred to as the outside air absolute humidity.
　続いて、制御装置３０の判定部３１４は、外気絶対湿度がデシカント外調機１０の出口に要求される絶対湿度（以下、要求絶対湿度と称する）より高いか否かを判定する（Ｓ１１１）。要求絶対湿度は予め手入力で制御装置３０に入力設定されている値である。
　ステップＳ１１１で、外気絶対湿度が要求絶対湿度以下の場合（Ｓ１１１→Ｎｏ）、制御装置３０のダンパ制御部３１５は第１ダンパ１６ａ及び第３ダンパ１６ｃを閉じるとともに、第２ダンパ１６ｂ及び第４ダンパ１６ｄを開き（Ｓ１１２）、処理部３１１は処理を終了する。このとき、ダンパ制御部３１５は第３ダンパ１６ｃを全閉とし、第４ダンパ１６ｄを全開とする。これにより、エアは、図４における太線の矢印に示すように、第１バイパス経路１７ｂ→第１冷却コイル１２→第２バイパス経路１７ｃの順に送られる。つまり、外気絶対湿度が、要求絶対湿度以下の場合、外気を除湿する必要がないので、エアは、全熱交換器１１及びデシカントロータ１３を介さない。なお、この場合の第１冷却コイル１２は、主にエアの温度を下げる役割を有する。 Subsequently, the determination unit 314 of the control device 30 determines whether or not the outdoor air absolute humidity is higher than the absolute humidity required at the outlet of the desiccant external air conditioner 10 (hereinafter, referred to as required absolute humidity) (S111). The required absolute humidity is a value that is manually input to the control device 30 in advance.
In step S111, when the outside absolute humidity is equal to or lower than the required absolute humidity (S111 → No), the damper control unit 315 of the control device 30 closes the first damper 16a and the third damper 16c, and the second damper 16b and the fourth damper. 16d is opened (S112), and the processing unit 311 ends the process. At this time, the damper control unit 315 fully closes the third damper 16c and fully opens the fourth damper 16d. As a result, the air is sent in the order of the first bypass path 17b → the first cooling coil 12 → the second bypass path 17c, as indicated by the thick arrow in FIG. That is, when the outside air absolute humidity is equal to or lower than the required absolute humidity, it is not necessary to dehumidify the outside air, so that air does not pass through the total heat exchanger 11 and the desiccant rotor 13. In this case, the first cooling coil 12 mainly has a role of lowering the temperature of the air.
　また、ステップＳ１１１で、外気絶対湿度が要求絶対湿度より高い場合（Ｓ１１１→Ｙｅｓ）、制御装置３０の判定部３１４は、外気エンタルピが還気エンタルピより低いか否かを判定する（Ｓ１２１）。
　ステップＳ１２１で、外気エンタルピが還気エンタルピ以上の場合（Ｓ１２１→Ｎｏ）、制御装置３０のダンパ制御部３１５は第１ダンパ１６ａ及び第３ダンパ１６ｃを開くとともに、第２ダンパ１６ｂ及び第４ダンパ１６ｄを閉じ（Ｓ１２２）、処理部３１１は処理を終了する。このとき、ダンパ制御部３１５は第３ダンパ１６ｃを全開とし、第４ダンパ１６ｄを全閉とする。これにより、エアは、図５における太線の矢印に示すように、全熱交換器１１→第１冷却コイル１２→デシカントロータ１３の順に送られる。つまり、ステップＳ１２１で「Ｎｏ」の場合は、外気の絶対湿度及びエンタルピが高い状態であるので、制御装置３０は、全熱交換器１１、第１冷却コイル１２及びデシカントロータ１３を用いて十分な除湿を行う。 When the outside absolute humidity is higher than the required absolute humidity in step S111 (S111 → Yes), the determination unit 314 of the control device 30 determines whether the outside air enthalpy is lower than the return air enthalpy (S121).
In step S121, when the outside air enthalpy is equal to or greater than the return air enthalpy (S121 → No), the damper control unit 315 of the control device 30 opens the first damper 16a and the third damper 16c, and the second damper 16b and the fourth damper 16d. Is closed (S122), and the processing unit 311 ends the processing. At this time, the damper control unit 315 fully opens the third damper 16c and fully closes the fourth damper 16d. As a result, the air is sent in the order of the total heat exchanger 11 → the first cooling coil 12 → the desiccant rotor 13 as indicated by the thick arrows in FIG. That is, in the case of “No” in step S121, since the absolute humidity and enthalpy of the outside air are high, the control device 30 is sufficient using the total heat exchanger 11, the first cooling coil 12, and the desiccant rotor 13. Dehumidify.
　ステップＳ１２１で、外気エンタルピが還気エンタルピより低い場合（Ｓ１２１→Ｙｅｓ）、制御装置３０の判定部３１４は、外気絶対湿度が定格運転時における第１冷却コイル１２の出口における絶対湿度（冷却コイル出口絶対湿度）より低いか否かを判定する（Ｓ１３１）。冷却コイル出口絶対湿度は、第１冷却コイル１２が定格運転を行っているときに第２湿度計５３から取得される値でもよいし、予め手入力で制御装置３０に入力設定されている値でもよい。ここで、第１冷却コイル１２の出口における絶対湿度が境界条件となっているのは、デシカントロータ１３の除湿能力を境界条件とするためである。言い換えれば、デシカントロータ１３の除湿能力を境界条件とするために、第１冷却コイル１２の出口における絶対湿度を境界条件としている。 In step S121, when the outside air enthalpy is lower than the return air enthalpy (S121 → Yes), the determination unit 314 of the control device 30 determines the absolute humidity at the outlet of the first cooling coil 12 during the rated operation (cooling coil outlet). It is determined whether it is lower than (absolute humidity) (S131). The cooling coil outlet absolute humidity may be a value acquired from the second hygrometer 53 when the first cooling coil 12 is performing a rated operation, or may be a value input and set in the control device 30 by manual input in advance. Good. Here, the absolute humidity at the outlet of the first cooling coil 12 is a boundary condition because the dehumidifying ability of the desiccant rotor 13 is the boundary condition. In other words, in order to use the dehumidifying capacity of the desiccant rotor 13 as a boundary condition, the absolute humidity at the outlet of the first cooling coil 12 is used as the boundary condition.
　ステップＳ１３１で、外気絶対湿度が冷却コイル出口絶対湿度以上の場合（Ｓ１３１→Ｎｏ）、制御装置３０のダンパ制御部３１５は第１ダンパ１６ａ及び第４ダンパ１６ｄを閉じ、第２ダンパ１６ｂ及び第３ダンパ１６ｃを開く（Ｓ１３２）。その後、処理部３１１は処理を終了する。このとき、ダンパ制御部３１５は第３ダンパ１６ｃを全開とし、第４ダンパ１６ｄを全閉とする。これにより、エアは、図６における太線の矢印に示すように、第１バイパス経路１７ｂ→第１冷却コイル１２→デシカントロータ１３の順に送られる。つまり、ステップＳ１３１で「Ｎｏ」の場合は、制御装置３０は、全熱交換器１１を用いず、第１冷却コイル１２、デシカントロータ１３を用いて除湿を行う。 In step S131, when the outside air absolute humidity is equal to or higher than the cooling coil outlet absolute humidity (S131 → No), the damper control unit 315 of the control device 30 closes the first damper 16a and the fourth damper 16d, and the second damper 16b and the third damper 16b. The damper 16c is opened (S132). Thereafter, the processing unit 311 ends the processing. At this time, the damper control unit 315 fully opens the third damper 16c and fully closes the fourth damper 16d. As a result, the air is sent in the order of the first bypass path 17b → the first cooling coil 12 → the desiccant rotor 13 as indicated by the thick arrows in FIG. That is, in the case of “No” in step S <b> 131, the control device 30 performs dehumidification using the first cooling coil 12 and the desiccant rotor 13 without using the total heat exchanger 11.
　ステップＳ１３１で、外気絶対湿度が冷却コイル出口絶対湿度より低い場合（Ｓ１３１→Ｙｅｓ）、制御装置３０のダンパ制御部３１５は第１ダンパ１６ａを閉じ、第２ダンパ１６ｂを開き、第３ダンパ１６ｃ及び第４ダンパ１６ｄを所定の開度で開く（Ｓ１４１）。その後、処理部３１１は処理を終了する。これにより、エアは図７における太線の矢印に示すように、第１バイパス経路１７ｂ→第１冷却コイル１２→デシカントロータ１３及び第２バイパス経路１７ｃの順に送られる。なお、デシカントロータ１３及び第２バイパス経路１７ｃを通過するエアの量は、第３ダンパ１６ｃ及び第４ダンパ１６ｄの開度に応じて所定の流量となる。
　例えば、外気の絶対湿度が小さいほど（要求絶対湿度に近いほど）、ダンパ制御部３１５は第３ダンパ１６ｃの開度を小さくし、第４ダンパ１６ｄの開度を大きくする。逆に、外気の絶対湿度が大きいほど（冷却コイル出口絶対湿度に近いほど）、ダンパ制御部３１５は第３ダンパ１６ｃの開度を大きくし、第４ダンパ１６ｄの開度を小さくする。 In step S131, when the outside air absolute humidity is lower than the cooling coil outlet absolute humidity (S131 → Yes), the damper control unit 315 of the control device 30 closes the first damper 16a, opens the second damper 16b, opens the third damper 16c, and The fourth damper 16d is opened at a predetermined opening (S141). Thereafter, the processing unit 311 ends the processing. As a result, the air is sent in the order of the first bypass path 17b → the first cooling coil 12 → the desiccant rotor 13 and the second bypass path 17c as shown by the thick arrows in FIG. The amount of air passing through the desiccant rotor 13 and the second bypass path 17c becomes a predetermined flow rate according to the opening degree of the third damper 16c and the fourth damper 16d.
For example, as the absolute humidity of the outside air is smaller (closer to the required absolute humidity), the damper control unit 315 decreases the opening of the third damper 16c and increases the opening of the fourth damper 16d. Conversely, as the absolute humidity of the outside air increases (closer to the cooling coil outlet absolute humidity), the damper control unit 315 increases the opening of the third damper 16c and decreases the opening of the fourth damper 16d.
　以降、エアは、デシカント外調機１０の出口において、室内からの還気と混合された後、第２冷却コイル２１にて顕熱処理されることで温度を下げられ、第２給気ファン２２によって室内へ供給される。 Thereafter, the air is mixed with the return air from the room at the outlet of the desiccant air conditioner 10, and then the temperature is lowered by sensible heat treatment in the second cooling coil 21. Supplied indoors.
　次に、空気線図を参照して、本実施形態に係るデシカント空調システム１の動作を説明する。
［空気線図］
　図８は、空気線図における本実施形態のデシカント空調システムにおける外気の状態による領域の分割を示す図である。
　図８における各軸、各線は一般的な空気線図に準じるため説明を省略する。なお、図８～図１２の空気線図における横軸の「乾球温度」は、本実施形態における「温度」である。
　図８に示すように、空気状態は線Ｌ１～Ｌ３によって、領域８０１～８０４に分けられる。
　線Ｌ１は、管理者が予め設定しておく絶対湿度（要求絶対湿度）を示す線である。
　点８１１は、還気の状態を示す点であり、点８１１を含む線Ｌ２は、還気との等エンタルピ（還気エンタルピ）を示す線である。
　また、線Ｌ３は定格運転時における第１冷却コイル１２の出口における絶対湿度（冷却コイル出口絶対湿度）を示す線である。 Next, the operation of the desiccant air conditioning system 1 according to the present embodiment will be described with reference to an air diagram.
[Air diagram]
FIG. 8 is a diagram showing division of regions according to the state of the outside air in the desiccant air conditioning system of the present embodiment in the air diagram.
Since each axis and each line in FIG. 8 conforms to a general air diagram, description thereof is omitted. The “dry bulb temperature” on the horizontal axis in the air diagrams of FIGS. 8 to 12 is the “temperature” in the present embodiment.
As shown in FIG. 8, the air state is divided into regions 801 to 804 by lines L1 to L3.
The line L1 is a line indicating the absolute humidity (required absolute humidity) preset by the administrator.
A point 811 is a point indicating the state of return air, and a line L2 including the point 811 is a line indicating an isoenthalpy (return air enthalpy) with the return air.
A line L3 is a line indicating the absolute humidity at the outlet of the first cooling coil 12 during the rated operation (cooling coil outlet absolute humidity).
　そして、絶対湿度が線Ｌ１で示される絶対湿度以下の領域を領域８０１と称する。
　また、絶対湿度が線Ｌ１で示される絶対湿度より高く、かつ、エンタルピが線Ｌ２で示されるエンタルピ以上である領域を領域８０２と称する。
　続いて、エンタルピが線Ｌ２で示されるエンタルピより低く、かつ、絶対湿度が線Ｌ３で示される絶対湿度以上である領域を領域８０３と称する。
　さらに、エンタルピが線Ｌ２で示されるエンタルピより低く、絶対湿度がＬ３で示される絶対湿度より低く、かつ、線Ｌ１で示される絶対湿度より高い領域を領域８０４と称する。 A region where the absolute humidity is equal to or lower than the absolute humidity indicated by the line L1 is referred to as a region 801.
A region where the absolute humidity is higher than the absolute humidity indicated by the line L1 and the enthalpy is equal to or higher than the enthalpy indicated by the line L2 is referred to as a region 802.
Subsequently, a region where the enthalpy is lower than the enthalpy indicated by the line L2 and the absolute humidity is equal to or higher than the absolute humidity indicated by the line L3 is referred to as a region 803.
Further, a region where the enthalpy is lower than the enthalpy indicated by the line L2, the absolute humidity is lower than the absolute humidity indicated by L3, and is higher than the absolute humidity indicated by the line L1, is referred to as a region 804.
［遷移図］
　以下、図９～図１２を参照して、外気の状態が図８に示される各領域８０１～８０４であった場合において、本実施形態に係るデシカント空調システム１におけるエアの状態の遷移を説明する。
　なお、図９～図１２における空気線図、領域８０１～８０４及び線Ｌ１～Ｌ３は図８に示すものと同一であるので、ここでの説明を省略する。 [Transition diagram]
Hereinafter, with reference to FIGS. 9 to 12, the transition of the air state in the desiccant air-conditioning system 1 according to the present embodiment when the state of the outside air is the respective regions 801 to 804 shown in FIG. 8 will be described. .
Note that the air diagram, regions 801 to 804, and lines L1 to L3 in FIGS. 9 to 12 are the same as those shown in FIG. 8, and a description thereof will be omitted here.
（外気が領域８０１の状態である場合）
　図９は、外気の状態が領域８０１に示す領域にある場合を示す状態遷移図であり、図３のステップＳ１１１で「Ｎｏ」が判定された場合に相当する。
　つまり、外気が点９０１で示される状態であったとすると、図４における太線の矢印に示されるように、エアは第１バイパス経路１７ｂ→第１冷却コイル１２→第２バイパス経路１７ｃの順に送られる。まず、エアは、第１冷却コイル１２において、温度を下げられるため点９０１から点９０２の状態に遷移する。なお、この場合、第１冷却コイル１２では、顕熱処理のみが行われる。 (When the outside air is in the state of the region 801)
FIG. 9 is a state transition diagram illustrating a case where the state of the outside air is in the region indicated by region 801, and corresponds to the case where “No” is determined in step S111 of FIG.
That is, if the outside air is in the state indicated by the point 901, the air is sent in the order of the first bypass path 17b → the first cooling coil 12 → the second bypass path 17c, as indicated by the thick arrow in FIG. . First, in the first cooling coil 12, the air transitions from a point 901 to a point 902 because the temperature can be lowered. In this case, only the sensible heat treatment is performed in the first cooling coil 12.
　そして、デシカント外調機１０の出口において、エアは、点９０３の状態（図８の点８１１と同じ状態）にある還気と混合して点９０４の状態となる。さらに、エアは、内調機２０における第２冷却コイル２１によって温度を下げられ点９０５の状態となって、室内に給気される。すなわち、第２冷却コイル２１では顕熱処理のみが行われる。 Then, at the outlet of the desiccant external air conditioner 10, the air is mixed with the return air in the state of the point 903 (the same state as the point 811 in FIG. 8) to be in the state of the point 904. Further, the temperature of the air is lowered by the second cooling coil 21 in the internal air conditioner 20 to a state of a point 905, and the air is supplied into the room. That is, only the sensible heat treatment is performed in the second cooling coil 21.
　領域８０１のように、エンタルピ及び絶対湿度が十分低い場合において、除湿を行う必要がない。このような場合、本実施形態に係るデシカント空調システム１は、全熱交換器１１及びデシカントロータ１３を使用しないことにより、圧力損失が低くなり無駄なエネルギロスをなくすことができる。 When the enthalpy and absolute humidity are sufficiently low as in the area 801, it is not necessary to perform dehumidification. In such a case, the desiccant air-conditioning system 1 according to the present embodiment does not use the total heat exchanger 11 and the desiccant rotor 13, thereby reducing pressure loss and eliminating wasteful energy loss.
（外気が領域８０２の状態である場合）
　図１０は、外気の状態が領域８０２に示す領域にある場合を示す状態遷移図であり、図３のステップＳ１２１で「Ｎｏ」が判定された場合に相当する。
　つまり、外気が点１００１で示される状態であったとすると、図５における太線の矢印に示されるように、エアは全熱交換器１１→第１冷却コイル１２→デシカントロータ１３の順に送られる。
　まず、エアは、全熱交換器１１によって温度及び絶対湿度を下げられ、点１００２の状態に遷移する。さらに、エアは第１冷却コイル１２によって、温度及び絶対湿度をさらに下げられ、点１００３の状態に遷移する。 (When outside air is in the state of the region 802)
FIG. 10 is a state transition diagram showing a case where the state of the outside air is in the region indicated by region 802, which corresponds to the case where “No” is determined in step S121 of FIG.
In other words, if the outside air is in the state indicated by the point 1001, the air is sent in the order of the total heat exchanger 11 → the first cooling coil 12 → the desiccant rotor 13 as indicated by the thick arrow in FIG.
First, the temperature of the air is lowered by the total heat exchanger 11, and the air transitions to the state of the point 1002. Further, the air is further lowered in temperature and absolute humidity by the first cooling coil 12, and transitions to the state of the point 1003.
　次に、エアはデシカントロータ１３を通過することで、絶対湿度がさらに下げられ、点１００４の状態に遷移する。なお、デシカントロータ１３で潜熱処理される際に、凝縮熱が放出されるため、デシカントロータ１３通過後の点１００４の温度は、点１００３の温度より高くなっている。 Next, when the air passes through the desiccant rotor 13, the absolute humidity is further lowered, and the state transitions to the state of the point 1004. In addition, since the heat of condensation is released when the latent heat treatment is performed by the desiccant rotor 13, the temperature of the point 1004 after passing through the desiccant rotor 13 is higher than the temperature of the point 1003.
　そして、デシカント外調機１０の出口において、エアは、点１００５の状態（図８の点８１１と同じ状態）にある還気と混合して点１００６の状態となる。さらに、エアは、内調機２０における第２冷却コイル２１によって温度を下げられ点１００７の状態となって、室内に給気される。すなわち、第２冷却コイル２１では顕熱処理のみが行われる。 Then, at the outlet of the desiccant air conditioner 10, the air is mixed with the return air in the state of the point 1005 (the same state as the point 811 in FIG. 8) to be in the state of the point 1006. Further, the temperature of the air is lowered by the second cooling coil 21 in the internal air conditioner 20 to a state of a point 1007, and the air is supplied into the room. That is, only the sensible heat treatment is performed in the second cooling coil 21.
　このように、本実施形態に係るデシカント空調システム１は、外気のエンタルピ及び絶対湿度が十分高い場合、全熱交換器１１、冷却コイル１２及びデシカントロータ１３による除湿を行う。このようにすることで、デシカント空調システム１は、第１冷却コイル１２の温度を必要以上に下げることがなくなるため、通常の冷却除湿のみの場合に比べて冷水温度を高く設定できるので冷凍機４０のＣＯＰ（Coefficient Of Performance；成績係数）を向上させることができる。 As described above, the desiccant air conditioning system 1 according to this embodiment performs dehumidification by the total heat exchanger 11, the cooling coil 12, and the desiccant rotor 13 when the enthalpy and absolute humidity of the outside air are sufficiently high. By doing in this way, since the desiccant air conditioning system 1 does not lower the temperature of the first cooling coil 12 more than necessary, the chiller 40 can be set at a higher chilled water temperature than in the case of only ordinary cooling and dehumidification. COP (Coefficient Of Performance) can be improved.
（外気が領域８０３の状態である場合）
　図１１は、外気の状態が領域８０３に示す領域にある場合を示す状態遷移図であり、図３のステップＳ１３１で「Ｎｏ」が判定された場合に相当する。
　つまり、外気が点１１０１で示される状態であったとすると、図６における太線の矢印に示されるように、エアは第１バイパス経路１７ｂ→第１冷却コイル１２→デシカントロータ１３の順に送られる。
　まず、エアは、第１冷却コイル１２によって、温度及び絶対湿度を下げられ、点１１０２の状態に遷移する。 (When the outside air is in the state of the region 803)
FIG. 11 is a state transition diagram illustrating a case where the state of the outside air is in the region indicated by region 803, which corresponds to the case where “No” is determined in step S131 of FIG.
In other words, if the outside air is in the state indicated by the point 1101, the air is sent in the order of the first bypass path 17b → the first cooling coil 12 → the desiccant rotor 13 as indicated by the thick arrow in FIG.
First, the air is lowered in temperature and absolute humidity by the first cooling coil 12, and transitions to the state of the point 1102.
　次に、エアはデシカントロータ１３を通過することで、絶対湿度がさらに下げられ、点１１０３の状態に遷移する。なお、デシカントロータ１３で潜熱処理される際に、凝縮熱が放出されるため、デシカントロータ１３通過後の点１１０３の温度は、点１１０２の温度より高くなっている。 Next, when the air passes through the desiccant rotor 13, the absolute humidity is further lowered, and the state transitions to the state of the point 1103. In addition, since heat of condensation is released when the latent heat treatment is performed by the desiccant rotor 13, the temperature of the point 1103 after passing through the desiccant rotor 13 is higher than the temperature of the point 1102.
　そして、デシカント外調機１０の出口において、エアは、点１１０４の状態（図８の点８１１と同じ状態）にある還気と混合して点１１０５の状態となる。さらに、エアは、内調機２０における第２冷却コイル２１によって温度を下げられ点１１０６の状態となって、室内に給気される。すなわち、第２冷却コイル２１では顕熱処理のみが行われる。 Then, at the outlet of the desiccant external air conditioner 10, the air is mixed with the return air in the state of the point 1104 (the same state as the point 811 in FIG. 8) and becomes the state of the point 1105. Further, the temperature of the air is lowered by the second cooling coil 21 in the internal air conditioner 20 to a state of a point 1106, and the air is supplied into the room. That is, only the sensible heat treatment is performed in the second cooling coil 21.
　外気が領域８０３の状態である場合、室内側のエンタルピが外気のエンタルピより高い状態である。従って、全熱交換器１１によってエンタルピを交換してしまうと、エアのエンタルピが上昇してしまい、本来必要のないエンタルピの下降処理が必要となってしまう。図６に示すように、全熱交換器１１をエアが介さないことで、不要なエンタルピの下降処理を避けることができ、デシカント空調システム１の効率を向上させることができる。 When the outside air is in the region 803, the indoor enthalpy is higher than the enthalpy of the outside air. Therefore, if the enthalpy is replaced by the total heat exchanger 11, the enthalpy of the air rises, and the enthalpy lowering process that is not necessary originally becomes necessary. As shown in FIG. 6, since air does not pass through the total heat exchanger 11, unnecessary enthalpy lowering processing can be avoided, and the efficiency of the desiccant air conditioning system 1 can be improved.
（外気が領域８０４の状態である場合）
　図１２は、外気の状態が領域８０４に示す領域にある場合を示す状態遷移図であり、図３のステップＳ１３１で「Ｙｅｓ」が判定された場合に相当する。
　つまり、外気が点１２０１で示される状態であったとすると、図７における太線の矢印に示されるように、エアは第１バイパス経路１７ｂ→第１冷却コイル１２→デシカントロータ１３及び第２バイパス経路１７ｃの順に送られる。なお、前記したように、エアの一部はデシカントロータ１３を通過し、残りは第２バイパス経路１７ｃを通過する。 (When the outside air is in the state of the region 804)
FIG. 12 is a state transition diagram illustrating a case where the state of the outside air is in the region indicated by region 804, and corresponds to the case where “Yes” is determined in step S131 of FIG.
In other words, if the outside air is in the state indicated by the point 1201, the air flows from the first bypass path 17b → the first cooling coil 12 → the desiccant rotor 13 and the second bypass path 17c as shown by the thick arrows in FIG. Sent in the order. As described above, a part of the air passes through the desiccant rotor 13 and the rest passes through the second bypass path 17c.
　まず、エアは、第１冷却コイル１２によって、温度を下げられ、点１２０２の状態に遷移する。なお、第１冷却コイル１２では、顕熱処理のみが行われる。 First, the temperature of the air is lowered by the first cooling coil 12, and the air transitions to the state of the point 1202. Note that only the sensible heat treatment is performed in the first cooling coil 12.
　次に、エアの一部はデシカントロータ１３を通過することで、絶対湿度がさらに下げられ、点１２０３の状態に遷移する。なお、デシカントロータ１３で潜熱処理される際に、凝縮熱が放出されるため、デシカントロータ１３通過後の点１２０３の温度は、点１２０２の温度より高くなっている。
　そして、デシカントロータ１３を通過したエア（点１２０３）は、第２バイパス経路１７ｃを通過したエア（状態は点１２０２のまま）と混合することで、点１２０４の状態となる。 Next, a part of the air passes through the desiccant rotor 13, whereby the absolute humidity is further lowered, and the state transitions to a point 1203. In addition, since heat of condensation is released when the latent heat treatment is performed by the desiccant rotor 13, the temperature of the point 1203 after passing through the desiccant rotor 13 is higher than the temperature of the point 1202.
And the air (point 1203) which passed the desiccant rotor 13 will be in the state of a point 1204 by mixing with the air which passed the 2nd bypass path | route 17c (a state remains the point 1202).
　続いて、デシカント外調機１０の出口において、エアは、点１２０５の状態（図８の点８１１と同じ状態）にある還気と混合して点１２０６の状態となる。さらに、エアは、内調機２０における第２冷却コイル２１によって温度を下げられ点１２０７の状態となって、室内に給気される。すなわち、第２冷却コイル２１では顕熱処理のみが行われる。 Subsequently, at the outlet of the desiccant air conditioner 10, the air is mixed with the return air in the state of the point 1205 (the same state as the point 811 in FIG. 8) and becomes the state of the point 1206. Further, the temperature of the air is lowered by the second cooling coil 21 in the internal air conditioner 20 to a state of a point 1207, and the air is supplied into the room. That is, only the sensible heat treatment is performed in the second cooling coil 21.
　外気が領域８０４の状態である場合、外気の絶対湿度は比較的低い状態である。このような場合、すべてのエアをデシカントロータ１３に通過させてしまうと、必要以上にエアが低湿度となってしまう可能性がある。本実施形態によれば、すべてのエアをデシカントロータ１３に通過させないことにより、必要以上の除湿を避けることができ、かつ圧力損失が下げられ、エネルギ的に効率的な運転が可能となる。 When the outside air is in the region 804, the absolute humidity of the outside air is relatively low. In such a case, if all the air is allowed to pass through the desiccant rotor 13, there is a possibility that the air has a lower humidity than necessary. According to the present embodiment, by not allowing all the air to pass through the desiccant rotor 13, it is possible to avoid excessive dehumidification, reduce the pressure loss, and enable an energy efficient operation.
［第１実施形態のまとめ］
　第１実施形態に係るデシカント空調システム１における制御装置３０は、外気のエンタルピ及び絶対湿度の状態に応じて、メイン経路１７ａ、第１バイパス経路１７ｂ及び第２バイパス経路１７ｃを通過するエアの制御を行う。このようにすることで、外気のエンタルピ及び湿度に応じた、効率的なデシカント空調システム１の制御が可能となる。 [Summary of First Embodiment]
The control device 30 in the desiccant air conditioning system 1 according to the first embodiment controls the air passing through the main path 17a, the first bypass path 17b, and the second bypass path 17c in accordance with the enthalpy and absolute humidity state of the outside air. Do. By doing in this way, control of the desiccant air conditioning system 1 according to the enthalpy and humidity of external air becomes possible efficiently.
　また、本実施形態に係るデシカント空調システム１の制御装置３０は、外気の絶対湿度がデシカント外調機１０の出口（すなわち、デシカントロータ１３の出口）に要求される絶対湿度より低い場合、エアが全熱交換器１１及びデシカントロータ１３を迂回するよう第１の切替器（第１ダンパ１６ａ、第２ダンパ１６ｂ）及び第２の切替器（第３ダンパ１６ｃ、第４ダンパ１６ｄ）を制御する。外気がこのような状態であると、エンタルピ及び絶対湿度が十分低い状態であるので、除湿を行う必要がない。従って、外気がこのような状態であるときに、制御装置３０が全熱交換器１１及びデシカントロータ１３を使用しないよう制御することにより、無駄なエネルギロスをなくすことができる。 Further, the control device 30 of the desiccant air conditioning system 1 according to the present embodiment allows the air to flow when the absolute humidity of the outside air is lower than the absolute humidity required for the outlet of the desiccant external air conditioner 10 (that is, the outlet of the desiccant rotor 13). The first switch (first damper 16a and second damper 16b) and the second switch (third damper 16c and fourth damper 16d) are controlled to bypass the total heat exchanger 11 and the desiccant rotor 13. When the outside air is in such a state, the enthalpy and the absolute humidity are sufficiently low, and it is not necessary to perform dehumidification. Therefore, when the outside air is in such a state, the control device 30 performs control so that the total heat exchanger 11 and the desiccant rotor 13 are not used, so that useless energy loss can be eliminated.
　さらに、本実施形態に係るデシカント空調システム１の制御装置３０は、外気の絶対湿度がデシカント外調機１０の出口（すなわち、デシカントロータ１３の出口）に要求される絶対湿度より高く、外気のエンタルピが還気のエンタルピより高い場合、エアが全熱交換器１１及びデシカントロータ１３を通過するよう第１の切替器（第１ダンパ１６ａ、第２ダンパ１６ｂ）及び第２の切替器（第３ダンパ１６ｃ、第４ダンパ１６ｄ）を制御する。外気がこのような状態であると、エンタルピ及び絶対湿度が高い状態であるので、十分な除湿を行う必要がある。従って、外気がこのような状態であるときに、制御装置３０が全熱交換器１１及びデシカントロータ１３による除湿を行うことで、第１冷却コイル１２の温度を必要以上に下げることがなくなる。従って、第１冷却コイル１２を冷却している冷凍機４０のＣＯＰを向上させることができる。 Furthermore, the control device 30 of the desiccant air-conditioning system 1 according to the present embodiment has a higher absolute humidity than the absolute humidity required for the outlet of the desiccant external air conditioner 10 (that is, the outlet of the desiccant rotor 13). Is higher than the return enthalpy, the first switch (first damper 16a, second damper 16b) and the second switch (third damper) so that the air passes through the total heat exchanger 11 and the desiccant rotor 13. 16c, the fourth damper 16d) is controlled. When the outside air is in such a state, the enthalpy and the absolute humidity are in a high state. Therefore, it is necessary to perform sufficient dehumidification. Therefore, when the outside air is in such a state, the controller 30 performs dehumidification by the total heat exchanger 11 and the desiccant rotor 13, so that the temperature of the first cooling coil 12 is not lowered more than necessary. Accordingly, the COP of the refrigerator 40 that is cooling the first cooling coil 12 can be improved.
　また、本実施形態に係るデシカント空調システム１の制御装置３０は、外気の絶対湿度がデシカント外調機１０の出口（すなわち、デシカントロータ１３の出口）に要求される絶対湿度より高く、外気のエンタルピが還気のエンタルピより低く、外気の絶対湿度が定格運転時における第１冷却コイル１２の出口の絶対湿度より高い場合、エアが全熱交換器１１を迂回し、デシカントロータ１３を通過するよう第１の切替器（第１ダンパ１６ａ、第２ダンパ１６ｂ）及び第２の切替器（第３ダンパ１６ｃ、第４ダンパ１６ｄ）を制御する。外気がこのような状態である場合、室内側のエンタルピが外気のエンタルピより高い状態である。従って、全熱交換器１１によってエンタルピを交換してしまうと、エアのエンタルピが上昇してしまい、本来必要のないエンタルピの下降処理が必要となってしまう。本実施形態では、外気がこのような状態である場合、全熱交換器１１をエアが迂回するようにすることで、不要なエンタルピの下降処理を避けることができ、デシカント空調システム１の効率を向上させることができる。 Further, the control device 30 of the desiccant air conditioning system 1 according to the present embodiment has a higher absolute humidity of the outside air than the absolute humidity required at the outlet of the desiccant air conditioner 10 (that is, the outlet of the desiccant rotor 13). Is lower than the return air enthalpy and the absolute humidity of the outside air is higher than the absolute humidity at the outlet of the first cooling coil 12 during rated operation, the air bypasses the total heat exchanger 11 and passes through the desiccant rotor 13. 1 switch (the 1st damper 16a, the 2nd damper 16b) and the 2nd switch (the 3rd damper 16c, the 4th damper 16d) are controlled. When the outside air is in such a state, the indoor enthalpy is higher than the enthalpy of the outside air. Therefore, if the enthalpy is replaced by the total heat exchanger 11, the enthalpy of the air rises, and the enthalpy lowering process that is not necessary originally becomes necessary. In the present embodiment, when the outside air is in such a state, by making the air bypass the total heat exchanger 11, unnecessary enthalpy lowering processing can be avoided, and the efficiency of the desiccant air conditioning system 1 can be improved. Can be improved.
　そして、本実施形態に係るデシカント空調システム１の制御装置３０は、外気の絶対湿度がデシカント外調機１０の出口（すなわち、デシカントロータ１３の出口）に要求される絶対湿度より高く、外気のエンタルピが還気のエンタルピより低く、外気の絶対湿度が定格運転時における第１冷却コイル１２の出口の絶対湿度より低い場合、エアが全熱交換器１１を迂回し、エアの一部がデシカントロータ１３を通過するよう第１の切替器（第１ダンパ１６ａ、第２ダンパ１６ｂ）及び第２の切替器（第３ダンパ１６ｃ、第４ダンパ１６ｄ）を制御する。外気がこのような状態である場合、外気の絶対湿度は比較的低い状態である。このような場合、すべてのエアをデシカントロータ１３に通過させてしまうと、必要以上にエアが低湿度となってしまう可能性がある。本実施形態では、外気がこのような状態である場合、すべてのエアをデシカントロータ１３に通過させないことにより、必要以上の除湿を避けることができる。 And the control apparatus 30 of the desiccant air conditioning system 1 which concerns on this embodiment has the absolute humidity of external air higher than the absolute humidity requested | required by the exit (namely, exit of the desiccant rotor 13) of the desiccant air conditioner 10, and the enthalpy of external air Is lower than the enthalpy of the return air and the absolute humidity of the outside air is lower than the absolute humidity of the outlet of the first cooling coil 12 during rated operation, the air bypasses the total heat exchanger 11 and a part of the air is the desiccant rotor 13. The first switch (the first damper 16a and the second damper 16b) and the second switch (the third damper 16c and the fourth damper 16d) are controlled to pass through. When the outside air is in such a state, the absolute humidity of the outside air is relatively low. In such a case, if all the air is allowed to pass through the desiccant rotor 13, there is a possibility that the air has a lower humidity than necessary. In the present embodiment, when the outside air is in such a state, it is possible to avoid excessive dehumidification by not allowing all the air to pass through the desiccant rotor 13.
　さらに、本実施形態に係るデシカント空調システム１の制御装置３０は、外気の絶対湿度がデシカント外調機１０の出口（すなわち、デシカントロータ１３の出口）に要求される絶対湿度より高く、外気のエンタルピが還気のエンタルピより低く、外気の絶対湿度が定格運転時における第１冷却コイル１２の出口の絶対湿度より低い場合、外気の絶対湿度が高いほど、デシカントロータ１３を通過するエアの量が増加するよう、第１の切替器（第１ダンパ１６ａ、第２ダンパ１６ｂ）及び第２の切替器（第３ダンパ１６ｃ、第４ダンパ１６ｄ）を制御する。また、制御装置３０は、外気の絶対湿度が低いほど、第２バイパス経路１７ｃを通過するエアの量が増加するよう、第１の切替器（第１ダンパ１６ａ、第２ダンパ１６ｂ）及び第２の切替器（第３ダンパ１６ｃ、第４ダンパ１６ｄ）を制御する。このようにすることで、本実施形態に係るデシカント空調システム１は必要以上の除湿を避けることを可能としつつ、好ましい状態の除湿を行うことができる。 Furthermore, the control device 30 of the desiccant air-conditioning system 1 according to the present embodiment has a higher absolute humidity than the absolute humidity required for the outlet of the desiccant external air conditioner 10 (that is, the outlet of the desiccant rotor 13). Is lower than the return air enthalpy and the absolute humidity of the outside air is lower than the absolute humidity at the outlet of the first cooling coil 12 during rated operation, the higher the absolute humidity of the outside air, the more the amount of air passing through the desiccant rotor 13 Thus, the first switch (first damper 16a, second damper 16b) and the second switch (third damper 16c, fourth damper 16d) are controlled. In addition, the controller 30 controls the first switch (the first damper 16a and the second damper 16b) and the second switch so that the amount of air passing through the second bypass path 17c increases as the absolute humidity of the outside air decreases. Switch (third damper 16c, fourth damper 16d). By doing in this way, the desiccant air conditioning system 1 which concerns on this embodiment can perform the dehumidification of a preferable state, making it possible to avoid the dehumidification more than necessary.
　なお、第１実施形態では、エンタルピと絶対湿度とで、外気の状態を領域８０１～８０４で分けて制御しているが、これらの領域が温度（乾球温度）や、相対湿度でさらに分割されてもよい。このようにすることで、より細かい気象条件に応じることができる。 In the first embodiment, the enthalpy and absolute humidity control the outside air state separately in the regions 801 to 804, but these regions are further divided by temperature (dry bulb temperature) and relative humidity. May be. By doing in this way, it can respond to a finer weather condition.
《第２実施形態》
［デシカント空調システム］
　図１３は、第２実施形態に係るデシカント空調システムの構成例を示す図である。
　なお、図１３において、図１と同様の構成要素については、同一の符号を付して説明を省略する。なお、図１３において、図１と同様、紙面右側が室内側であり、紙面左側が屋外側である。
　第２実施形態に係るデシカント空調システム１ａにおいて、第１実施形態に係るデシカント空調システム１と異なる点は以下の通りである。すなわち、制御装置３０ａが、室内状態値７１を基に、第１給気ファン１４、第２給気ファン２２、排気ファン１５におけるインバータ６１～６３を制御することで、第１給気ファン１４、第２給気ファン２２、排気ファン１５の回転速度を制御することである。室内状態値７１については、後記する。 << Second Embodiment >>
[Desicant air conditioning system]
FIG. 13 is a diagram illustrating a configuration example of a desiccant air conditioning system according to the second embodiment.
In FIG. 13, the same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted. In FIG. 13, as in FIG. 1, the right side of the page is the indoor side, and the left side of the page is the outdoor side.
The desiccant air conditioning system 1a according to the second embodiment differs from the desiccant air conditioning system 1 according to the first embodiment as follows. That is, the control device 30a controls the inverters 61 to 63 in the first air supply fan 14, the second air supply fan 22, and the exhaust fan 15 based on the indoor state value 71, whereby the first air supply fan 14, This is to control the rotation speed of the second air supply fan 22 and the exhaust fan 15. The indoor state value 71 will be described later.
［制御装置］
　図１４は、第２実施形態に係るデシカント空調システムの制御装置の構成例を示す図である。適宜、図１３を参照する。
　図１４に示す制御装置３０ａが、図２に示す制御装置３０と異なる点は、処理部３１１ａが室内状態値７１を基に第１給気ファン１４、第２給気ファン２２、排気ファン１５におけるインバータ６１～６３を制御するインバータ制御部３１６を有する点である。このインバータ制御部３１６は、記憶装置３３０に格納されているプログラムがメモリ３１０に展開され、ＣＰＵ３２０によって実行されることで具現化する。 [Control device]
FIG. 14 is a diagram illustrating a configuration example of a control device of the desiccant air conditioning system according to the second embodiment. Reference is made to FIG. 13 as appropriate.
The control device 30a shown in FIG. 14 is different from the control device 30 shown in FIG. 2 in that the processing unit 311a is based on the indoor state value 71 in the first supply fan 14, the second supply fan 22, and the exhaust fan 15. The inverter control unit 316 that controls the inverters 61 to 63 is provided. The inverter control unit 316 is realized by a program stored in the storage device 330 being expanded in the memory 310 and executed by the CPU 320.
［フローチャート］
　図１５は、第２実施形態に係るデシカント空調システムの制御装置における風量制御の処理手順を示すフローチャートである。適宜、図１３、図１４を参照する。
　制御装置３０ａの取得部３１２は、室内状態値７１を取得し（Ｓ２０１）、必要に応じて、算出部３１３が取得した室内状態値７１を基に室内条件値を算出する（Ｓ２０２）。例えば、室内状態値７１とは、室内で稼動しているコンピュータの台数等であり、また、室内条件値とは、稼動しているコンピュータの台数に基づいて算出される室内の人数等である。 [flowchart]
FIG. 15 is a flowchart showing a processing procedure of air volume control in the control device of the desiccant air conditioning system according to the second embodiment. Reference is made to FIGS. 13 and 14 as appropriate.
The acquisition unit 312 of the control device 30a acquires the indoor state value 71 (S201), and calculates the indoor condition value based on the indoor state value 71 acquired by the calculation unit 313 as necessary (S202). For example, the indoor state value 71 is the number of computers operating indoors, and the indoor condition value is the number of indoors calculated based on the number of computers operating.
　次に、制御装置３０ａの算出部３１３は室内条件値における人数と、予め設定されている定数値である「一人当たりの必要外気取入量（ｍ３／（ｈ・人）」とを乗算することにより、外気取入量を算出する（Ｓ２０３）。 Next, the calculation unit 313 of the control device 30a multiplies the number of people in the room condition value by a preset constant value “required outside air intake amount per person (m 3 / (h · person)”. Thus, the outside air intake amount is calculated (S203).
　続いて、制御装置３０ａの算出部３１３は、室内にいる人により発生する１人あたりの顕熱負荷（Ｗ／人）と、室内の人数の積である人発生顕熱負荷量（Ｗ）を算出する。さらに、算出部３１３は、照明・コンセント等による単位床面積当たりの顕熱負荷（Ｗ／ｍ２）と、床面積との積である機器発生顕熱負荷量（Ｗ）を算出する。なお、１人あたりの顕熱負荷及び単位床面積当たりの顕熱負荷は、予め設定されている定数値である。
　そして、制御装置３０ａの算出部３１３は、人発生顕熱負荷と、機器発生顕熱負荷とを加算することによりデシカント空調システム１ａが処理すべき顕熱負荷量（Ｗ）を算出する（Ｓ２０４）。ここで、処理すべき顕熱負荷量は、室内の温度を設定温度に保つため、顕熱処理すべき室内において発生する熱量である。 Subsequently, the calculation unit 313 of the control device 30a calculates the sensible heat load per person (W / person) generated by a person in the room and the person-generated sensible heat load (W) that is the product of the number of persons in the room. calculate. Furthermore, the calculation unit 313 calculates a device-generated sensible heat load (W) that is a product of the sensible heat load (W / m 2 ) per unit floor area due to lighting, an outlet, and the like, and the floor area. The sensible heat load per person and the sensible heat load per unit floor area are preset constant values.
And the calculation part 313 of the control apparatus 30a calculates the sensible heat load amount (W) which the desiccant air conditioning system 1a should process by adding a human generation | occurrence | production sensible heat load and an apparatus generation | occurrence | production sensible heat load (S204). . Here, the sensible heat load to be processed is the amount of heat generated in the room to be subjected to the sensible heat treatment in order to keep the room temperature at the set temperature.
　続いて、制御装置３０ａの算出部３１３はステップＳ２０４で算出された処理すべき顕熱負荷量を基に、以下の式（１）により給気風量を算出する（Ｓ２０５）。 Subsequently, based on the sensible heat load to be processed calculated in step S204, the calculation unit 313 of the control device 30a calculates the supply air volume by the following equation (1) (S205).
　給気風量＝３６００×ｑ／（Ｃｐ×ρ×Δｔ）・・・（１） Supply air volume = 3600 × q / (Cp × ρ × Δt) (1)
　なお、式（１）において、「３６００」は秒から時間への単位換算（ｓ／ｈ）である。また、「ｑ」はステップＳ２０４で算出された処理すべき顕熱負荷量（Ｗ＝Ｊ／ｓ）である。さらに、「Ｃｐ」は定圧比熱（≒１００６Ｊ／（ｋｇ・Ｋ））であり、「ρ」は空気密度（≒１．２ｋｇ／ｍ３）であり、「Δｔ」は給気吹出温度と室内温度との差（℃）である。 In the formula (1), “3600” is unit conversion from second to time (s / h). “Q” is the sensible heat load (W = J / s) to be processed calculated in step S204. Furthermore, “Cp” is a constant pressure specific heat (≈1006 J / (kg · K)), “ρ” is an air density (≈1.2 kg / m 3 ), and “Δt” is a supply air blowing temperature and an indoor temperature. (° C).
　制御装置３０ａのインバータ制御部３１６は、算出した給気風量に基づいて、第１給気ファン１４、第２給気ファン２２及び排気ファン１５におけるインバータ６１～６３を制御する（Ｓ２０６）。ここで、インバータ制御部３１６は、ステップＳ２０３で算出された外気取入量を基に、第１給気ファン１４を駆動するインバータ６１を制御する。また、インバータ制御部３１６は、ステップＳ２０５で算出された給気風量を基に、第２給気ファン２２を駆動するインバータ６３を制御する。また、インバータ制御部３１６は、ステップＳ２０３で算出された外気取入量を基に、排気ファン１５を駆動するインバータ６２を制御する。 The inverter control unit 316 of the control device 30a controls the inverters 61 to 63 in the first supply fan 14, the second supply fan 22, and the exhaust fan 15 based on the calculated supply air volume (S206). Here, the inverter control unit 316 controls the inverter 61 that drives the first air supply fan 14 based on the outside air intake amount calculated in step S203. Further, the inverter control unit 316 controls the inverter 63 that drives the second air supply fan 22 based on the air supply air amount calculated in step S205. Further, the inverter control unit 316 controls the inverter 62 that drives the exhaust fan 15 based on the outside air intake amount calculated in step S203.
　図１６に、室内の潜熱負荷が大きい場合の室内の人数と、外気風量、給気風量、還気風量の関係の一例を示す。図１６において、横軸は室内の人数を示し、縦軸は風量を示している。符号１６０１が外気風量（＝外気取入量）を示す線であり、第１給気ファン１４の風量である。また、符号１６０２が給気風量を示す線であり、第２給気ファン２２の風量である。そして、符号１６０３が還気風量を示す線である。また、各プロットはシミュレーションによる計算値である。なお、図１６において、外気風量の単位は「ｍ３／ｈ」に換算してある。また、図１６では、室内のコンピュータ等の機器による発熱の影響は考慮していない。
　さらに、線１６１１はデシカント空調システム１ａの設計時に設定した人数である。 FIG. 16 shows an example of the relationship between the number of people in the room and the outside air volume, the supply air volume, and the return air volume when the latent heat load in the room is large. In FIG. 16, the horizontal axis indicates the number of people in the room, and the vertical axis indicates the air volume. Reference numeral 1601 is a line indicating the outside air flow rate (= outside air intake amount), which is the air volume of the first air supply fan 14. Reference numeral 1602 denotes a line indicating the supply air volume, which is the air volume of the second supply fan 22. Reference numeral 1603 is a line indicating the return air volume. Each plot is a calculated value by simulation. In FIG. 16, the unit of the outside air volume is converted to “m 3 / h”. Further, in FIG. 16, the influence of heat generated by a device such as an indoor computer is not considered.
Further, a line 1611 is the number of persons set at the time of designing the desiccant air conditioning system 1a.
　図１６に示すように、室内の人数が減少すると、室内における潜熱負荷が減少するため、外気取入量（＝外気風量：線１６０１）が減少し、また室内における顕熱負荷が減少するため、給気風量（線１６０２）も減少する。 As shown in FIG. 16, since the latent heat load in the room decreases when the number of people in the room decreases, the outside air intake amount (= outdoor air volume: line 1601) decreases, and the sensible heat load in the room decreases. The supply air volume (line 1602) also decreases.
　また、室内の人数が増加すると、室内における潜熱負荷、顕熱負荷共に増加するため、外気取入量（線１６０１）は増加し、それに伴い給気風量（線１６０２）も増加する。 Also, as the number of people in the room increases, both the latent heat load and sensible heat load in the room increase, so the outside air intake amount (line 1601) increases and the air supply air volume (line 1602) also increases accordingly.
　なお、室内の顕熱負荷が大きい図１６に示すような場合には、人数の増加に伴う給気風量の増加量は、外気風量の増加量よりも緩やかになる。
　従って、給気風量（線１６０２）と、外気風量（線１６０１）との差である還気風量（線１６０３）は、室内の人数が増えるに従って減少していく。 In the case where the indoor sensible heat load is large as shown in FIG. 16, the increase amount of the supply air volume accompanying the increase in the number of persons becomes more gradual than the increase amount of the outside air volume.
Therefore, the return air volume (line 1603), which is the difference between the supply air volume (line 1602) and the outside air volume (line 1601), decreases as the number of people in the room increases.
［まとめ］
　第２実施形態のデシカント空調システム１ａは、室内の状態に応じて第２給気ファン２２を動作させることができる。このようにすることで、デシカント空調システム１ａにおいても、室内の状態に応じて効率的に動作させることが可能となる。
　さらに、式（１）に示す式を用いて給気風量を決定することによって、より正確に適切な給気風量を決定することが可能となる。
　そして、室内の条件として室内の顕熱及び潜熱の負荷量が推定できるもの、例えば、室内における人数を用いることで、室内の人数に応じた適切なデシカント空調システム１ａの動作が可能となる。 [Summary]
The desiccant air conditioning system 1a of the second embodiment can operate the second air supply fan 22 in accordance with the indoor state. By doing in this way, also in desiccant air-conditioning system 1a, it becomes possible to operate efficiently according to the state of a room.
Furthermore, by determining the supply air volume using the equation (1), it is possible to determine the appropriate supply air volume more accurately.
Then, by using the indoor sensible heat and latent heat load, for example, the number of people in the room as the indoor conditions, it is possible to operate the appropriate desiccant air conditioning system 1a according to the number of people in the room.
　なお、第２実施形態では、室内の人数や、機器の発熱量を基に第２給気ファン２２の給気風量が算出されているが、これに限らず、湿度等を考慮して算出されてもよい。
　室内の人数の算出は、床に設置された重量計等によって行われてもよい。また、個人が使用するコンピュータと、該個人の体重等を対応付けたデータを制御装置３０ａが保持していてもよい。そして、制御装置３０ａの算出部３１３は、電源が入っているコンピュータと、そのコンピュータを使用している人の体重等から、該人の発熱量を算出し、この発熱量を基にデシカント空調システム１ａが処理すべき顕熱負荷量を算出してもよい。 In the second embodiment, the air supply air volume of the second air supply fan 22 is calculated based on the number of people in the room and the amount of heat generated by the device. However, the present invention is not limited to this and is calculated in consideration of humidity and the like. May be.
The calculation of the number of people in the room may be performed by a scale or the like installed on the floor. The control device 30a may hold data in which a computer used by an individual is associated with the weight of the individual. The calculation unit 313 of the control device 30a calculates the heat generation amount of the person from the computer that is turned on and the weight of the person using the computer, and the desiccant air conditioning system based on the heat generation amount. The sensible heat load to be processed by 1a may be calculated.
　あるいは、室内に設置された温度計によって測定された室内の温度を基に、制御装置３０ａの算出部３１３がデシカント空調システム１ａで処理すべき顕熱負荷量を算出してもよい。
　これらのようにすることで、室内の状態に応じた制御を、より精度を高くして行うことができる。 Or based on the indoor temperature measured with the thermometer installed indoors, you may calculate the amount of sensible heat loads which the calculation part 313 of the control apparatus 30a should process with the desiccant air conditioning system 1a.
By doing in this way, the control according to the indoor state can be performed with higher accuracy.
　本発明は前記した実施形態に限定されるものではなく、様々な変形例が含まれる。例えば、前記した実施形態は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明したすべての構成を有するものに限定されるものではない。また、ある実施形態の構成の一部を他の実施形態の構成に置き換えることが可能であり、ある実施形態の構成に他の実施形態の構成を加えることも可能である。また、各実施形態の構成の一部について、他の構成の追加・削除・置換をすることが可能である。 The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to having all the configurations described. In addition, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
　また、前記した各構成、機能、各部３１１～３１６、記憶装置３３０等は、それらの一部又はすべてを、例えば集積回路で設計すること等によりハードウェアで実現してもよい。また、図２、図１４に示すように、前記した各構成、機能等は、ＣＰＵ３２０等のプロセッサがそれぞれの機能を実現するプログラムを解釈し、実行することによりソフトウェアで実現してもよい。各機能を実現するプログラム、テーブル、ファイル等の情報は、フラッシュメモリ等の記憶装置３３０に格納すること以外に、ＨＤ（Hard Disk）や、ＳＳＤ（Solid State Drive）等の記録装置、又は、ＩＣ（Integrated Circuit）カードや、ＳＤ（Secure Digital）カード、ＤＶＤ（Digital Versatile Disc）等の記録媒体に格納することができる。
　また、各実施形態において、制御線や情報線は説明上必要と考えられるものを示しており、製品上必ずしもすべての制御線や情報線を示しているとは限らない。実際には、ほとんどすべての構成が相互に接続されていると考えてよい。 Further, each of the above-described configurations, functions, units 311 to 316, storage device 330, and the like may be realized by hardware by designing a part or all of them, for example, with an integrated circuit. As shown in FIGS. 2 and 14, the above-described configurations, functions, and the like may be realized by software by a processor such as the CPU 320 interpreting and executing a program that realizes each function. In addition to storing information such as programs, tables, and files for realizing each function in a storage device 330 such as a flash memory, a recording device such as an HD (Hard Disk) or SSD (Solid State Drive), or an IC It can be stored in a recording medium such as an (Integrated Circuit) card, an SD (Secure Digital) card, or a DVD (Digital Versatile Disc).
In each embodiment, control lines and information lines are those that are considered necessary for explanation, and not all control lines and information lines are necessarily shown on the product. In practice, it can be considered that almost all configurations are connected to each other.
　１，１ａ　デシカント空調システム
　１０　　デシカント外調機
　１１　　全熱交換器
　１２　　第１冷却コイル（冷却器）
　１３　　デシカントロータ
　１４　　第１給気ファン
　１５　　排気ファン
　１６ａ　第１ダンパ（第１の切替器）
　１６ｂ　第２ダンパ（第１の切替器）
　１６ｃ　第３ダンパ（第２の切替器）
　１６ｄ　第４ダンパ（第２の切替器）
　１７ａ　メイン経路
　１７ｂ　第１バイパス経路
　１７ｃ　第２バイパス経路
　２０　　内調機
　２１　　第２冷却コイル
　２２　　第２給気ファン
　３０，３０ａ　制御装置（制御手段）
　６１～６３　インバータ
　７１　　室内状態値
　３１１，３１１ａ　処理部
　３１２　取得部
　３１３　算出部
　３１４　判定部
　３１５　ダンパ制御部
　３１６　インバータ制御部
　８０１～８０４　領域 1,1a Desiccant air conditioning system 10 Desiccant air conditioner 11 Total heat exchanger 12 First cooling coil (cooler)
13 Desiccant Rotor 14 First Air Supply Fan 15 Exhaust Fan 16a First Damper (First Switcher)
16b Second damper (first switch)
16c Third damper (second switcher)
16d 4th damper (second switcher)
17a Main path 17b First bypass path 17c Second bypass path 20 Internal air conditioner 21 Second cooling coil 22 Second air supply fan 30, 30a Control device (control means)
61-63 Inverter 71 Indoor state value 311, 311a Processing unit 312 Acquisition unit 313 Calculation unit 314 Determination unit 315 Damper control unit 316 Inverter control unit 801-804 region

Claims (7)

  1. 　全熱交換器と、
    　デシカントロータと、
    　エアが前記全熱交換器及び前記デシカントロータを経由するためのメイン経路と、
    　前記全熱交換器の前後で前記メイン経路に接続し、前記エアが前記全熱交換器を迂回するための第１バイパス経路と、
    　前記デシカントロータの前後で前記メイン経路に接続し、前記エアが前記デシカントロータを迂回するための第２バイパス経路と、
    　外気のエンタルピ及び湿度を基に、前記メイン経路、前記第１バイパス経路及び前記第２バイパス経路を通過するエアの制御を行う制御手段と、
    　を備えるデシカント空調システム。     A total heat exchanger,
    Desiccant rotor,
    A main path for air to pass through the total heat exchanger and the desiccant rotor;
    A first bypass path for connecting to the main path before and after the total heat exchanger, the air bypassing the total heat exchanger;
    A second bypass path connected to the main path before and after the desiccant rotor, the air bypassing the desiccant rotor;
    Control means for controlling air passing through the main path, the first bypass path, and the second bypass path based on the enthalpy and humidity of outside air;
    Desiccant air conditioning system with.
  2. 　前記第１バイパス経路へ流れるエアをオン・オフする第１の切替器と、
    　前記第２バイパス経路へ流れるエアの流量を調節する第２の切替器と、
    　を、さらに有し、
    　前記制御手段は、
    　前記外気の絶対湿度が前記デシカントロータの出口に要求される絶対湿度より低い場合、前記エアが前記全熱交換器及び前記デシカントロータを迂回するよう前記第１の切替器及び前記第２の切替器を制御する
    　ことを特徴とする請求項１に記載のデシカント空調システム。     A first switch for turning on and off the air flowing to the first bypass path;
    A second switch for adjusting the flow rate of air flowing to the second bypass path;
    And further
    The control means includes
    The first switch and the second switch so that the air bypasses the total heat exchanger and the desiccant rotor when the absolute humidity of the outside air is lower than the absolute humidity required at the outlet of the desiccant rotor. The desiccant air conditioning system according to claim 1, wherein the desiccant air conditioning system is controlled.
  3. 　前記第１バイパス経路へ流れるエアをオン・オフする第１の切替器と、
    　前記第２バイパス経路へ流れるエアの流量を調節する第２の切替器と、
    　除湿を行うための冷却器と、
    　を、さらに有し、
    　前記制御手段は、
    　前記外気の絶対湿度が前記デシカントロータの出口に要求される絶対湿度より高く、前記外気のエンタルピが還気のエンタルピより高い場合、前記エアが前記全熱交換器、前記冷却器及び前記デシカントロータを通過するよう前記第１の切替器及び前記第２の切替器を制御する
    　ことを特徴とする請求項１に記載のデシカント空調システム。     A first switch for turning on and off the air flowing to the first bypass path;
    A second switch for adjusting the flow rate of air flowing to the second bypass path;
    A cooler for dehumidification;
    And further having
    The control means includes
    When the absolute humidity of the outside air is higher than the absolute humidity required at the outlet of the desiccant rotor and the enthalpy of the outside air is higher than the enthalpy of the return air, the air passes through the total heat exchanger, the cooler, and the desiccant rotor. The desiccant air-conditioning system according to claim 1, wherein the first switch and the second switch are controlled to pass.
  4. 　前記第１バイパス経路へ流れるエアをオン・オフする第１の切替器と、
    　前記第２バイパス経路へ流れるエアの流量を調節する第２の切替器と、
    　除湿を行うための冷却器と、
    　を、さらに有し、
    　前記制御手段は、
    　前記外気の絶対湿度が前記デシカントロータの出口に要求される絶対湿度より高く、前記外気のエンタルピが還気のエンタルピより低く、前記外気の絶対湿度が定格運転時における前記冷却器の出口の絶対湿度より高い場合、前記エアが前記全熱交換器を迂回し、前記デシカントロータを通過するよう前記第１の切替器及び前記第２の切替器を制御する
    　ことを特徴とする請求項１に記載のデシカント空調システム。     A first switch for turning on and off the air flowing to the first bypass path;
    A second switch for adjusting the flow rate of air flowing to the second bypass path;
    A cooler for dehumidification;
    And further
    The control means includes
    The absolute humidity of the outside air is higher than the absolute humidity required at the outlet of the desiccant rotor, the enthalpy of the outside air is lower than the enthalpy of the return air, and the absolute humidity of the outside air at the rated operation is the absolute humidity at the outlet of the cooler 2. The apparatus according to claim 1, wherein, when higher, the first switch and the second switch are controlled so that the air bypasses the total heat exchanger and passes through the desiccant rotor. Desiccant air conditioning system.
  5. 　前記第１バイパス経路へ流れるエアをオン・オフする第１の切替器と、
    　前記第２バイパス経路へ流れるエアの流量を調節する第２の切替器と、
    　除湿を行うための冷却器と、
    　を、さらに有し、
    　前記制御手段は、
    　前記外気の絶対湿度が前記デシカントロータの出口に要求される絶対湿度より高く、前記外気のエンタルピが還気のエンタルピより低く、前記外気の絶対湿度が定格運転時における前記冷却器の出口の絶対湿度より低い場合、前記エアが前記全熱交換器を迂回し、前記エアの一部が前記デシカントロータを通過するよう前記第１の切替器及び前記第２の切替器を制御する
    　ことを特徴とする請求項１に記載のデシカント空調システム。     A first switch for turning on and off the air flowing to the first bypass path;
    A second switch for adjusting the flow rate of air flowing to the second bypass path;
    A cooler for dehumidification;
    And further
    The control means includes
    The absolute humidity of the outside air is higher than the absolute humidity required at the outlet of the desiccant rotor, the enthalpy of the outside air is lower than the enthalpy of the return air, and the absolute humidity of the outside air at the rated operation is the absolute humidity at the outlet of the cooler If lower, the air bypasses the total heat exchanger, and the first switch and the second switch are controlled so that a part of the air passes through the desiccant rotor. The desiccant air conditioning system according to claim 1.
  6. 　前記制御手段は、
    　前記外気の絶対湿度が高いほど、前記デシカントロータを通過するエアの量が増加するよう、前記第２の切替器を制御し、
    　前記外気の絶対湿度が低いほど、前記第２バイパス経路を通過するエアの量が増加するよう、前記第２の切替器を制御する
    　ことを特徴とする請求項５に記載のデシカント空調システム。     The control means includes
    Controlling the second switch so that the amount of air passing through the desiccant rotor increases as the absolute humidity of the outside air increases,
    The desiccant air conditioning system according to claim 5, wherein the second switch is controlled such that the amount of air passing through the second bypass path increases as the absolute humidity of the outside air decreases.
  7. 　全熱交換器と、
    　デシカントロータと、
    　エアが前記全熱交換器及び前記デシカントロータを経由するメイン経路と、
    　前記全熱交換器の前後で前記メイン経路に接続し、前記エアが前記全熱交換器を迂回する第１バイパス経路と、
    　前記デシカントロータの前後で前記メイン経路に接続し、前記エアが前記デシカントロータを迂回する第２バイパス経路と、
    　前記エアの経路の制御を行う制御手段と、を有するデシカント空調システムにおいて、
    　前記制御手段が、
    　外気のエンタルピ及び湿度を基に、前記メイン経路、前記第１バイパス経路及び前記第２バイパス経路を通過するエアの制御を行う
    　ことを特徴とするデシカント空調システムの制御方法。     A total heat exchanger,
    Desiccant rotor,
    A main path through which air passes through the total heat exchanger and the desiccant rotor;
    A first bypass path that connects to the main path before and after the total heat exchanger, and the air bypasses the total heat exchanger;
    A second bypass path connected to the main path before and after the desiccant rotor, wherein the air bypasses the desiccant rotor;
    A desiccant air conditioning system having control means for controlling the air path,
    The control means is
    A control method for a desiccant air conditioning system, wherein air passing through the main path, the first bypass path, and the second bypass path is controlled based on enthalpy and humidity of outside air.
PCT/JP2014/083252 2014-02-07 2014-12-16 Desiccant air-conditioning system and method for controlling desiccant air-conditioning system WO2015118779A1 (en)

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JPH01318823A (en) * 1988-06-20 1989-12-25 Takenaka Komuten Co Ltd Outdoor air processing system in air conditioner
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JP2001041495A (en) * 1999-08-03 2001-02-13 Komatsu Electronics Inc Constant temperature and constant humidity air supplying device
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