JP2972834B2 - Desiccant air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a desiccant air conditioner, and more particularly to a desiccant air conditioner using an absorption heat pump as a heat source for heating and cooling.

[0002]

2. Description of the Related Art Desiccant air conditioners are disclosed in U.S. Pat.
No. 700,537. In the desiccant air conditioner shown in this known example, a heat source at a temperature of about 100 to 150 ° C. is required as a heat source for regeneration of the desiccant (hygroscopic agent), and an electric heater or a boiler is exclusively used as a heat source. Was. Recently, with the improvement of desiccant, a desiccant air conditioner capable of regenerating desiccant even at a temperature of 60 to 80 ° C. has been developed, and can be operated with a low-temperature heat source.

FIG. 5 shows an embodiment of an air conditioner (hereinafter, referred to as a desiccant air conditioner) of a known desiccant type air conditioner improved as described above, and FIG. 6 shows an operation state of the air conditioner of the embodiment of FIG. It is the Mollier diagram shown. In FIG. 5, reference numeral 101 denotes an air-conditioned space, 102 denotes a blower, 103 denotes a desiccant rotor containing a desiccant material capable of selectively contacting processing air and regeneration air, 104 denotes a sensible heat exchanger, 105 denotes a humidifier, 106 Is the water supply pipe of the humidifier, 10
7 to 111 are air passages for conditioned air, 130 is a blower for regeneration air, 120 is a heat exchanger (heater) for hot water and regeneration air, 121 is a sensible heat exchanger, 122 and 123 are hot water pipes, and 124 to 129 are air passages for the regeneration air. Also, in the figure, alphabets K to V circled
Is a symbol indicating the state of air corresponding to FIG.
Represents air supply, RA represents return air, OA represents outside air, and EX represents exhaust.

The operation of this known device will be described. Referring to FIG. 5, air (process air) in a room 101 to be air-conditioned is sucked into a blower 102 through a path 107, is pressurized, and passes through a path 108 to the desiccant rotor 103. The moisture in the air is adsorbed by the desiccant rotor by the desiccant rotor and the absolute humidity decreases. At the time of adsorption, the temperature of the air rises due to the heat of adsorption. The air whose humidity has decreased and its temperature has increased is sent to the sensible heat exchanger 104 via the path 109 and cooled by exchanging heat with outside air (regenerated air). The cooled air is sent to the humidifier 105 via the path 110, and the temperature is reduced in the isenthalpy process by water injection or vaporization humidification and the path 111
Is returned to the air-conditioned space 101.

Since the desiccant adsorbs moisture in this process, it needs to be regenerated. In this conventional example, the desiccant is performed as follows using outside air. The outside air (OA) is sucked into the blower 130 via the path 124 and is boosted and sent to the sensible heat exchanger 104, where it cools the processing air to increase its temperature, and passes through the path 125 to the next sensible heat exchanger 121. And heat exchange with hot air after regeneration to increase the temperature. Sensible heat exchanger 1
The regenerated air exiting from 21 flows into the heater 120 via the path 126 and is heated by the hot water, the temperature rises to 60 to 80 ° C., and the relative humidity decreases. The regenerated air having a reduced relative humidity passes through the desiccant rotor 103 to remove moisture from the desiccant rotor. The regenerated air that has passed through the desiccant rotor 103 flows into the sensible heat exchanger 121 via a path 128, performs the residual heat of the regenerated air before regeneration, and is then discarded as exhaust through a path 129.

The process up to now will be described with reference to a psychrometric chart. In FIG. 6, air in the room 101 to be air-conditioned (process air: state K) passes through a path 107 and
2, the pressure is increased, and is sent to the desiccant rotor 103 via the path 108. The moisture in the air is adsorbed by the desiccant rotor 103, the absolute humidity decreases, and the temperature of the air rises due to the heat of adsorption (state L). The air whose humidity has decreased and the temperature has increased passes through a path 109 and the sensible heat exchanger 104.
And cooled by exchanging heat with outside air (regenerated air) (state M). The cooled air passes through the path 110 and passes through the humidifier 10
Then, the temperature is lowered in the isenthalpy process by water injection or vaporization humidification (state P), and returned to the air-conditioned space 101 via the path 111. In this way, an enthalpy difference ΔQ is generated between the return air (K) and the supply air (P) in the room, whereby the air-conditioned space 101 is cooled.

[0007] The desiccant is reproduced as follows.
The outside air (OA: state Q) passes through the path 124 to the blower 130
The pressure is increased and sent to the sensible heat exchanger 104, which cools the processing air to increase its temperature (state R).
After that, the refrigerant flows into the next sensible heat exchanger 121 through heat exchange with high-temperature air after regeneration (temperature S). Further, the regenerated air exiting from the sensible heat exchanger 121 flows into the heater 120 via the path 126 and is heated by hot water to be heated to 60 to 80.
The temperature rises to ° C. and the relative humidity decreases (state T). The regenerated air having a reduced relative humidity passes through the desiccant rotor 103 to remove moisture from the desiccant rotor (state U). The regenerated air that has passed through the desiccant rotor 103 flows into the sensible heat exchanger 121 via the path 128, and performs the residual heat of the regenerated air before the regeneration to lower the temperature itself (state V).
Thereafter, it is discarded as exhaust air through a path 129. By repeating the desiccant regeneration and the dehumidification and cooling of the processing air in this manner, air conditioning by the desiccant has been performed.

[0008] The operation coefficient (COP) indicating the energy efficiency of the desiccant air conditioner thus configured is obtained by dividing the cooling effect ΔQ in FIG. 6 by the regeneration heating amount ΔH (ΔQ / ΔH).
In the conventional desiccant air conditioning, although the working temperature of the hot water for heating the regeneration air is lower than that of the initial desiccant air conditioner, the boiler is used as the desiccant regeneration heat source, and the Since high-quality energy (exergy) with a calorific value was used only as a calorie of less than 1 at a low temperature of less than 100 ° C., air was cooled using another heat-driven refrigerator (for example, a double effect absorption refrigerator). There was a drawback that the coefficient of operation (COP) was lower than that of an air conditioning system for cooling and dehumidifying.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and has been developed as a heat source unit which replaces a boiler, and a drive input heat amount externally applied for heating regeneration air and an evaporation pumped from a low temperature. A heating source at an intermediate temperature of about 60 to 80 ° C. from which heat plus heat can be taken out, and a cooling source at about 15 ° C. for cooling which can further cool the air in the process of cooling the processing air performed during the desiccant air conditioning cycle By combining an absorption heat pump that can supply air as a heat source, the energy efficiency of desiccant air conditioning is improved,
It is an object of the present invention to provide a desiccant air conditioner that exceeds the energy efficiency of an air conditioning system that cools and dehumidifies air using a conventional refrigerator.

[0010]

According to the present invention, a first evaporator, a first absorber, a first regenerator and a first condenser for performing an absorption refrigeration cycle is provided. A cycle device, a second evaporator, a second absorber, a second regenerator and a second
And a second cycle device for performing an absorption refrigeration cycle operating at a lower temperature than the absorption refrigeration cycle of the first cycle device, wherein the heat source is an absorption heat pump; A desiccant that adsorbs moisture of the processing air supplied to the air-conditioned space, the desiccant being regenerated using heat of absorption of the first absorber and heat of condensation of the second condenser as heating sources; 2 is configured to use the heat of absorption of the second absorber as the heat of evaporation of the first evaporator; and is configured to use the heat of condensation of the first condenser for heating in the second regenerator. The processing air is cooled by the heat of evaporation of the second evaporator.

Further, according to the present invention, in order to regenerate the desiccant, heat absorbed by the first absorber and the second
A heating path for flowing a medium that conveys the heat of condensation of the condenser, wherein the heating path is disposed so that the absorption solution temperature of the first absorber is higher than the refrigerant condensation temperature of the second condenser. Have been.

According to the present invention, the desiccant is said process air regeneration and to the desiccant rotor configured to be able to contact the selective air; the process air and the regeneration air and the heat exchange medium A sensible heat exchanger that heats the regenerated air in contact with the desiccant from the sensible heat exchanger to the desiccant rotor by the heating source, and supplies the processing air supplied to the air-conditioned space. The cooling is performed on the way from the sensible heat exchanger to the air-conditioned space.

In this specification, the heat pump includes a refrigerator.

As a heat source for desiccant air conditioning, the desiccant air conditioner combined with the absorption heat pump of the present invention configured as described above reduces the amount of drive input heat applied to the regenerator of the first cycle device by the heat of the second cycle device. The heat of the amount of heat corresponding to the amount of heat to which the heat of evaporation is added is used as the heat of condensation of the first cycle device and the heat of absorption of the second cycle device. Heating medium, that is, heating at an intermediate temperature of about 60 to 80 ° C. for desiccant regeneration. And the heat of evaporation of the evaporator of the second cycle device can be used as a cooling heat source of about 15 ° C. in the process of cooling the air performed during the desiccant air conditioning cycle. It is possible to save the primary energy required for regeneration and to provide a desiccant air-conditioning system that increases the cooling effect and thus has a high coefficient of operation. It can be.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a desiccant air conditioner according to the present invention will be described below with reference to FIGS.

FIG. 1 is a diagram showing a basic configuration of a desiccant air conditioner according to the present invention. The absorption heat pump includes a first evaporator 3, a first absorber 1, a first regenerator 2, a first condenser 4, and a first heat exchanger 5 for absorbing solution. Of an absorption refrigeration cycle using
, A second evaporator 13, a second absorber 11, a second regenerator 12, a second condenser 14, and a second heat exchanger 15 for absorbing solution. A second cycle device that performs a second absorption refrigeration cycle that operates at a lower temperature than the absorption refrigeration cycle of the first cycle device, and includes a first evaporator 3 and a second evaporator 3 of the first cycle device. A heat exchanger 21 between the second absorber 11 of the first cycle device and the second regenerator 12 of the second cycle device with the first condenser 4 of the first cycle device. The heat exchanger 20 is formed between the first and second heat exchangers, and a heat transfer path 32 is provided for extracting the heat of absorption of the first heat exchanger and the heat of condensation of the second heat exchanger as a heat source. Pass from 31 to the heat exchanger tube 30 of the first cycle device Constituting a path of transport medium to the heat exchange Te.

In FIG. 1, the hot water pipe and the cold water pipe of the absorption heat pump thus configured are connected to a desiccant air conditioner shown below, respectively.
Are connected via a.

The part of the air conditioner of the desiccant air conditioner of FIG. 1 is configured as follows. The air-conditioned space 101 is connected to a suction port of a blower 102 for processing air via a path 107, and a discharge port of the blower 102 is connected to the desiccant rotor 1.
03 via the path 108 and the desiccant rotor 1
03 is connected to the sensible heat exchanger 104, which has a heat exchange relationship with the regenerated air, via a path 109, and the processing air outlet of the sensible heat exchanger 104 is connected to the chilled water heat exchanger 115 and the path 110. The outlet of the processing air of the cooler 115 is connected to the humidifier 105 via the path 119, and the outlet of the processing air of the humidifier 105 is connected to the air-conditioned space 101 and the path 11
1 to form a process air cycle device.

On the other hand, a regeneration air path connects outside air to a suction port of a regeneration air blower 130 via a path 124, and a discharge port of the blower 130 has a sensible heat exchange Sensible heat exchanger 10
4 is connected to the low-temperature side inlet of another sensible heat exchanger 121 via a path 125, and the sensible heat exchanger 121
Is connected to the heater 120 via a path 126, the outlet of the regeneration air of the heater 120 is connected to the regeneration air inlet of the desiccant rotor 103 via a path 127, and the outlet of the regeneration air of the desiccant rotor 103. Is connected to the high temperature side inlet of the sensible heat exchanger 121 via the path 128, and the high temperature side outlet of the sensible heat exchanger 121 is connected to the external space via the path 129 to take in regeneration air from outside, A cycle to exhaust to the outside is formed.

The hot water inlet of the heater 120 is connected to the heating path 1
22, the hot water path of the absorption heat pump is connected to the outlet of the first absorber 1 of the first cycle device, and the heater 12
The hot water outlet of 0 is connected via a path 123 and a hot water pump 150 to the inlet of the second condenser 14 of the second cycle device in the hot water path of the absorption heat pump. The chilled water inlet of the chilled water heat exchanger 115 is connected to the outlet of the second evaporator 13 of the second cycle device in the chilled water path of the absorption heat pump via the cooling path 117, and the chilled water outlet of the cooler 115 is connected to the path 118. And the second evaporator 13 of the second cycle device in the chilled water path of the absorption heat pump via the pump 160
Connect to the entrance. In the figure, circled alphabets K to V are symbols indicating the state of air corresponding to FIG. 4, where SA is air supply, RA is return air, OA is outside air, and EX is air.
Represents the exhaust gas. The absorption cycle of the absorption heat pump portion of the desiccant air conditioner configured as described above will be described below. The absorption solution of the first cycle device is heated by an external heat source (not shown) in the first regenerator 2 via the heat transfer tube 34 to generate a refrigerant vapor, and after being concentrated, the first heat exchanger 2 5 to the first absorber 1. In the first absorber 1, the absorbing solution absorbs the refrigerant evaporated in the first evaporator 3, and after being diluted, passes through the first heat exchanger 5 again through the first heat exchanger 5 by the action of the pump 6.
Return to the regenerator 2. Since the first absorber 1 uses the heat of absorption generated during absorption, a heat medium such as hot water and a heat transfer tube 3 are used.
0 heat exchange. The refrigerant vapor generated in the first regenerator 2 flows into the first condenser 4 and condenses. In the first condenser 4, the heat of condensation generated during the condensation is transferred by the heat exchange device 20 to the second regenerator 12 of the second cycle device. The condensed refrigerant is sent to the first evaporator 3 and evaporates. In the first evaporator 3, the evaporative heat absorbed during the evaporation is transmitted from the second absorber 11 of the second cycle device by the heat exchange device 21. Note that the heat transfer tube of the first condenser 4 is directly connected to the second heat transfer tube as in a normal double effect absorption refrigerator.
The same operation can be performed without any problem even if it is installed in the second regenerator 12 of the cycle device.

The absorption solution of the second cycle device is condensed in the second regenerator 12 by the heat of condensation of the first cycle device.
0, generates refrigerant vapor, is concentrated, and then reaches the second absorber 11 via the second heat exchanger 15.
In the second absorber 11, the absorbing solution absorbs the refrigerant evaporated in the second evaporator 13, and after being diluted, passes through the second heat exchanger 15 again by the action of the pump 16 to become the second regenerator 12.
Return to In the second absorber 11, the heat of absorption generated at the time of absorption is transferred by the heat exchange device 21 to the evaporator 3 of the first cycle device. The refrigerant vapor generated in the second regenerator 12 flows into the second condenser 14 and condenses. In the second condenser 14, heat is exchanged between the heat medium and the heat transfer tube 31 in order to utilize the heat of condensation generated during the condensation.

The heat medium flows from the condenser heat transfer tube 31 of the second cycle device to the absorber heat transfer tube 30 of the first cycle device in order, so that the absorption solution temperature of the first cycle device becomes the second. It becomes higher than the refrigerant condensation temperature of the cycle device. The condensed refrigerant is sent to the second evaporator 13 and evaporates. In the second evaporator 13, heat is exchanged with a heat medium such as cold water by the heat transfer tube 33 in order to use the evaporation heat absorbed during the evaporation. The heat transfer tube of the second absorber 11 may be installed directly in the first evaporator 3 of the first cycle device, and the same operation can be performed.

Next, the operation of the absorption heat pump of the desiccant air conditioner constructed as described above will be described with reference to FIG. FIG. 2 is a During diagram showing a cycle of a part of an absorption heat pump of the desiccant air conditioner of FIG. This figure shows a typical example of a lithium bromide-water system generally used in an absorption refrigerator. The alphabetic symbols shown in the figure indicate the states of the absorbing solution and the refrigerant, and the same symbols are circled in FIG.

The absorption solution of the first cycle device is heated by an external heat source in the first regenerator 2, generates refrigerant vapor and is concentrated (state c: 175 ° C. in the figure), and then subjected to the first heat exchange It reaches the first absorber 1 via the absorber 5 (state d). In the first absorber 1, the absorbing solution absorbs the refrigerant evaporated in the first evaporator 3 and is diluted (state a) and then heated again through the first heat exchanger 5 (state b). Return to the regenerator 2. The refrigerant vapor generated in the first regenerator 2 flows into the first condenser 4 and condenses (state f). In the first condenser 4, the heat of condensation generated during the condensation is transferred by the heat exchange device 20 to the second regenerator 12 of the second cycle device. The condensed refrigerant is sent to the first evaporator 3 and evaporates (state e). First
In the evaporator 3, the heat of evaporation absorbed during the evaporation is converted into the heat exchange device 2.
1 transmitted from the second absorber 11 of the second cycle device (state A).

The absorption solution of the second cycle device is heated in the second regenerator 12 by the heat of condensation (state f) of the first cycle device through the heat exchange device 20, generates refrigerant vapor, and is concentrated. After that (state C), it reaches the second absorber 11 via the second heat exchanger 15 (state D). In the second absorber 11, the absorbing solution is the refrigerant evaporated in the second evaporator 13 (state E).
After being diluted (state A), it is heated again via the second heat exchanger 15 (state B) and returns to the second regenerator 12. In the second absorber 11, the heat of absorption generated at the time of absorption is converted by the heat exchange device 21 into the evaporator 3 of the first cycle device.
(State e). The refrigerant vapor generated in the second regenerator 12 flows into the second condenser 14 and condenses (state F). The heat medium is transferred to the condenser heat transfer tube 31 of the second cycle device.
Through the heat transfer tube 30 of the first cycle device, the absorption solution temperature of the first cycle device (state a: 75 ° C. in the figure) is reduced to the refrigerant condensing temperature of the second cycle device (state F). : 65 ° C. in the figure). The condensed refrigerant (state F) is sent to the second evaporator 13 and evaporates (state E).

In the absorption heat pump configured as described above, the high-temperature heat externally applied to the first regenerator 2 of the first cycle device is used for the concentration of the solution in the first cycle device. Since the generated heat of the refrigerant vapor can be reused for the solution concentration of the second cycle device, 1
With one heat input, solution concentration, which is a driving force for two refrigeration cycles, can be performed. The heat absorbed by the second cycle device is used in the system as the heat of evaporation of the first cycle device. Therefore, heat of absorption can be used in the first cycle device and heat of condensation and heat of evaporation can be used in the second cycle device. As shown in FIG. 2, the heat generated in the process of absorption and condensation is heated to 60 ° C. to 80 ° C. It can be used as a source for desiccant regeneration, and the heat of evaporation of the second cycle device can be used as a cooling source of about 15 ° C. for cooling process air.

Looking at the heat balance of the heat pump of this embodiment, the heat input to this heat pump is caused by the high temperature heat externally applied to the regenerator of the first cycle device and the cold water by the evaporator of the second cycle device. And the heat output from the heat pump is the heat of absorption of the first cycle device and the heat of condensation of the second cycle device added to the regeneration air as the regeneration heat of the desiccant. Therefore, the regeneration air contains
In addition to the high-temperature heat externally applied to the regenerator of the first cycle device, the heat removed from the processing air by the evaporator of the second cycle device is added. The amount of heat added to the regenerator of the cycle device from outside is increased. Thus, the entire first and second cycle devices have a heat pump function.

Further, the heat of absorption of the first cycle device and the heat of condensation of the second cycle device are externally controlled so that the absorption solution temperature of the first cycle device is higher than the refrigerant condensation temperature of the second cycle device. The configuration of the conveyance medium, that is, the path of the hot water, which is taken out as hot water for use, is that, as described later, heat exchange with air when hot water is used for desiccant air conditioning is a sensible heat change on the air side, and the specific heat of air is hot water. Since the temperature change is remarkably low and the temperature change is large, even if the flow rate of the hot water is reduced and the temperature change is increased, the heat exchange is performed efficiently, and therefore, the second cycle device corresponding to the hot water inflow side of the absorption heat pump for producing hot water Can be set lower than the absorption temperature of the first cycle device corresponding to the outlet side, so that the pressure of the first regenerator 2 of the first cycle device can be reduced. And it is possible to lower the temperature, the effect of the first heating amount to the regenerator 2 of the first cycle apparatus can be reduced.

Next, the operation when the absorption heat pump configured as described above is combined with desiccant air conditioning will be described.
FIG. 3 is a Mollier diagram showing an operation state of an air conditioning part of the embodiment of FIG.

The operation of the desiccant air conditioner of this embodiment will be described.
The air (process air) 1 passes through the path 107 and
Then, the pressure is increased and the pressure is sent to the desiccant rotor 103 via the path 108. The moisture in the air is adsorbed by the desiccant rotor's moisture absorbent, and the absolute humidity is reduced. At the time of adsorption, the temperature of the air rises due to the heat of adsorption. The air whose humidity has decreased and its temperature has increased is sent to the sensible heat exchanger 104 via the path 109 and cooled by exchanging heat with outside air (regenerated air). The cooled air is sent to a cooler 115 via a path 110 and further cooled. The cooled processing air is sent to the humidifier 105, and its temperature is lowered in the isenthalpy process by water injection or vaporization humidification, and is returned to the air-conditioned space 101 via the path 111.

Since the desiccant rotor adsorbs moisture in this process, regeneration is required. In this embodiment, the desiccant rotor is operated as follows using outside air as regeneration air. The outside air (OA) is sucked into the blower 130 via the path 124 and is boosted and sent to the sensible heat exchanger 104, where it cools the processing air to increase its temperature, and passes through the path 125 to the next sensible heat exchanger 121. And heat exchange with hot air after regeneration to increase the temperature. Further, the regenerated air exiting from the sensible heat exchanger 121 passes through path 1
After flowing into the heater 120 through the heater 26, it is heated by the hot water, the temperature rises to 60 to 80 ° C., and the relative humidity decreases. This process is a change in the sensible heat of the regenerated air. Since the specific heat of the air is significantly lower than that of the hot water and the temperature change is large, even if the flow rate of the hot water is reduced and the temperature change is increased, the heat exchange is performed efficiently. Therefore, the condensing temperature of the second cycle device corresponding to the inflow side of the hot water of the absorption heat pump for producing the hot water can be set lower than the absorption temperature of the first cycle device corresponding to the outlet side. Since the pressure and temperature of the first regenerator 2 of the cycle device can be reduced, the first regenerator 2 of the first cycle device can be reduced.
The amount of heating to the is reduced.

Further, since the flow rate is reduced by increasing the difference in the use temperature of the hot water, the transfer power is reduced. The regenerated air having a reduced relative humidity after exiting the heater 120 passes through the desiccant rotor 103 to remove moisture from the desiccant rotor and perform a regeneration operation. The regenerated air that has passed through the desiccant rotor 103 flows into the sensible heat exchanger 121 via the path 128, and after performing the residual heat of the regenerated air before regeneration, the path 129.
And is discarded outside as exhaust gas.

The process up to now will be described with reference to a Mollier diagram. In FIG. 3, the air in the room 101 to be air-conditioned (processed air: state K) passes through a path 107 and is supplied to a blower 102.
Then, the pressure is increased, and the pressure is increased. Then, the moisture is sent to the desiccant rotor 103 through the path 108, the moisture in the air is adsorbed by the desiccant rotor 103, the absolute humidity is reduced, and the temperature of the air is increased by the heat of adsorption (state L). The air whose humidity has decreased and its temperature has increased is sent to the sensible heat exchanger 104 via the path 109 and exchanges heat with outside air (regenerated air) to be cooled (state M). The cooled air passes through a path 110 to a cooler 115
And further cooled (state N). The cooled air is sent to the humidifier 105 via the path 110, and its temperature is lowered in the isenthalpy process by water injection or vaporization humidification (state P), and is returned to the air-conditioned space 101 via the path 111.
In this way, the indoor return air (state K) and air supply (state P)
And an enthalpy difference ΔQ is generated between them, whereby the air-conditioned space 101 is cooled.

The desiccant is reproduced as follows.
The outside air for regeneration (OA: state Q) is sucked into the blower 130 via the path 124, is pressurized and sent to the sensible heat exchanger 104, cools the processing air, and rises in temperature (state R).
It flows into the next sensible heat exchanger 121 via the path 125 and exchanges heat with the high-temperature air after regeneration to increase the temperature (state S). Further, the regenerated air exiting the sensible heat exchanger 121 flows into the heater 120 via the path 126, is heated by the hot water, is heated to 60 to 80 ° C., and the relative humidity is reduced (state T). The regenerated air having a reduced relative humidity passes through the desiccant rotor 103 to remove moisture from the desiccant rotor (state U). The regenerated air that has passed through the desiccant rotor 103 flows into the sensible heat exchanger 121 via the path 128, and the regenerated air before regeneration that has exited the sensible heat exchanger 104 undergoes residual heat to lower its temperature (state V). ) After the route 129
And is discarded outside as exhaust gas. In this manner, the desiccant is air-conditioned by repeating the desiccant regeneration and the dehumidification and cooling of the processing air.

Although desiccant air-conditioning has been widely used in the past as a method for using the exhaust gas accompanying the indoor ventilation as the regeneration air, the present invention can also use the exhaust gas from the room as the regeneration air. The same effect as that of the embodiment can be obtained.

The operating coefficient (COP) indicating the energy efficiency of the desiccant air conditioner thus configured is shown by dividing the cooling effect ΔQ by the regeneration heating amount in FIG. 3, and is added to the regeneration air by the hot water heat exchanger. Of the obtained heat quantity ΔH, the heat quantity of the heat quantity Δq cooled by the chilled water heat exchanger is transferred from the processing air through the chilled water heat exchanger 115 and the second evaporator 13 of the second cycle device by the heat pump action of the absorption heat pump. As a result, the amount of heat actually applied to this system is Δh, which is ΔH minus Δq,
In the figure, this corresponds to a sensible heat change from state X to state T.

Therefore, the operation coefficient is ΔQ / (ΔH−Δq)
= ΔQ / Δh. Comparing the operation coefficient of FIG. 3 with the operation coefficient of the conventional example of FIG. 6, in the embodiment of the present invention, the refrigeration effect ΔQ of the numerator increases by Δq as compared with the conventional example, and the heating amount of the denominator is compared with the conventional example. Therefore, the operating coefficient is significantly improved because the denominator is reduced and the numerator is increased.

The operation coefficient of the desiccant air-conditioning system of the present invention is roughly calculated as follows. The operating coefficient for the refrigeration effect of the absorption heat pump is approximately 0.6, which is comparable to that of a conventional single-effect absorption refrigerator, and the operating coefficient of the conventional desiccant air conditioner is 1.
In the embodiment of the present invention, when the amount of heat to be externally heated to the absorption heat pump is set to 0, 1.6 is added to the hot water by the heat pump action, and the desiccant air conditioning is operated by this heat. And the cooling effect is 1.0 (operation coefficient) × 1.6 (heating amount) +0.6 (refrigeration effect: Δ
q) = 2.2. Therefore, the operation coefficient of the present invention is 2.2 (cooling effect) /1.0 (heat input to the absorption heat pump) = 2.2. This value greatly exceeds the operating coefficient of the conventional double effect absorption refrigerator of about 1.2, and has an extremely high energy saving effect.

In this manner, heat of a heat amount corresponding to a heat amount obtained by adding the evaporation heat of the second cycle device to the drive input heat amount applied to the regenerator of the first cycle device is condensed by the first cycle device. It can be used as a heat source at an intermediate temperature of about 60 to 80 ° C. for desiccant regeneration in the form of heat and absorption heat of the second cycle device. Further, the evaporation heat of the evaporator of the second cycle device is desiccant Since it can be used as a cooling heat source of about 15 ° C. in the process of cooling the air performed during the air conditioning cycle, the primary energy required for desiccant regeneration can be saved and the effect of increasing the cooling effect can be obtained.

FIG. 4 shows another embodiment of the present invention. FIG.
FIG. 1 is a diagram showing a basic configuration of a desiccant air conditioner according to the present invention, in which an absorption heat pump includes a first evaporator 3, a first absorber 1, a first regenerator 2, and a first regenerator 2. A first cycle device for performing an absorption refrigeration cycle using the condenser 4 and the first heat exchanger 5 for absorbing solution as constituent devices, a second evaporator 13, a second absorber 11, and a second regeneration. A second absorption refrigeration cycle that operates at a lower temperature than the absorption refrigeration cycle of the first cycle device is performed by using the vessel 12, the second condenser 14, and the second heat exchanger 15 of the absorption solution as constituent devices. A heat exchanger 21 between the first evaporator 3 of the first cycle device and the second absorber 11 of the second cycle device; The first condenser 4 and the second condenser of the cycle device
The heat exchange device 20 is formed between the second regenerator 12 of the first cycle device and the transfer medium paths 231 and 232 that take out the heat absorbed by the first cycle device as a heat source. The transfer medium paths 221 and 222 which are connected to the absorber heat transfer tube 30 via the pump 251 and take out the condensation heat of the second cycle device as a heat source are connected to the condenser heat transfer tube 31 and the pump 250 of the second cycle device. And a heating path of the transport medium is configured to be used as a heating source in the air conditioner system.

The air conditioner of the desiccant air conditioner of FIG. 4 is configured as follows. The air-conditioned space 101 is connected to a suction port of a blower 102 for processing air via a path 107, and a discharge port of the blower 102 is connected to the desiccant rotor 1.
03 via the path 108 and the desiccant rotor 1
03 is connected to the sensible heat exchanger 104, which has a heat exchange relationship with the regenerated air, via a path 109, and the processing air outlet of the sensible heat exchanger 104 is connected to the chilled water heat exchanger 115 and the path 110. The outlet of the processing air of the cooler 115 is connected to the humidifier 105 via the path 119, and the outlet of the processing air of the humidifier 105 is connected to the air-conditioned space 101 and the path 11
1 to form a cycle of process air.

On the other hand, the regeneration air path connects the outside air to the suction port of the regeneration air blower 130 through the path 124, and the discharge port of the blower 130 has a sensible heat exchange heat exchange relation with the processing air. Sensible heat exchanger 10
4 is connected to the low-temperature side inlet of another sensible heat exchanger 121 via a path 125, and the sensible heat exchanger 121
Is connected to the first heater 220 via the path 126, and the outlet of the first heater 220 is connected to the second heater 2.
30 via a path 252 and a second heater 230
The outlet of the regeneration air is connected to the regeneration air inlet of the desiccant rotor 103 via a path 127, and the desiccant rotor 1
03 is connected to the high-temperature side inlet of the sensible heat exchanger 121 via the path 128, and the high-temperature side outlet of the sensible heat exchanger 121 is connected to the external space via the path 129 to generate the regenerated air. From outside to form a cycle to exhaust to the outside.

The hot water inlet of the first heater 220 is connected via a path 221 to the outlet of the second condenser 14 of the second cycle device in the hot water path of the absorption heat pump. The hot water outlet is connected via a path 222 and a hot water pump 250 to the inlet of the second condenser 14 of the second cycle device in the hot water path of the absorption heat pump. The hot water inlet of the second heater 230 is connected to the outlet of the first absorber 1 of the first cycle device in the hot water path of the absorption heat pump via the path 231, and the hot water outlet of the second heater 230 Is connected to the inlet of the absorber 1 of the first cycle device in the hot water path of the absorption heat pump via the path 232 and the hot water pump 251. The chilled water inlet of the cooler 115 is connected to the outlet of the second evaporator 13 of the second cycle device in the chilled water path of the absorption heat pump via the path 117, and the chilled water outlet of the chilled water heat exchanger 115 is connected to the path 118 and the path. The pump 160 is connected to the inlet of the second evaporator 13 of the second cycle device in the chilled water path of the absorption heat pump. In the figure, circled alphabets K to V are symbols indicating the state of air corresponding to FIG. 3, where SA is supply air, RA is return air, OA is outside air, and EX is exhaust air. Express.

Next, the absorption cycle of the absorption heat pump portion of the desiccant air conditioner configured as described above will be described. The absorption solution of the first cycle device is heated by an external heat source (not shown) in the first regenerator 2 via the heat transfer tube 34 to generate a refrigerant vapor, and after being concentrated, the first heat exchanger 2 5 to the first absorber 1. In the first absorber 1, the absorbing solution absorbs the refrigerant evaporated in the first evaporator 3, and after being diluted, the first heat exchanger 5 is again actuated by the action of the pump 6.
And returns to the first regenerator 2. In the first absorber 1, heat is exchanged with a heat medium such as hot water by the heat transfer tube 30 in order to use the absorbed heat generated at the time of absorption. The refrigerant vapor generated in the first regenerator 2 flows into the first condenser 4 and condenses. In the first condenser 4, the heat of condensation generated during the condensation is transferred by the heat exchange device 20 to the second regenerator 12 of the second cycle device. The condensed refrigerant is sent to the first evaporator 3 and evaporates. In the first evaporator 3, the evaporative heat absorbed during the evaporation is transmitted from the second absorber 11 of the second cycle device by the heat exchange device 21.

The absorption solution of the second cycle device is supplied to the second regenerator 12 by the heat of condensation of the first cycle device.
0, generates refrigerant vapor, is concentrated, and then reaches the second absorber 11 via the second heat exchanger 15.
In the second absorber 11, the absorbing solution absorbs the refrigerant evaporated in the second evaporator 13, and after being diluted, passes through the second heat exchanger 15 again by the action of the pump 16 to become the second regenerator 12.
Return to In the second absorber 11, the heat of absorption generated at the time of absorption is transferred by the heat exchange device 21 to the evaporator 3 of the first cycle device. The refrigerant vapor generated in the second regenerator 12 flows into the second condenser 14 and condenses. In the second condenser 14, heat is exchanged between the heat medium and the heat transfer tube 31 in order to utilize the heat of condensation generated during the condensation. The second heater connected to the heat medium taken out of the absorber heat transfer tube 30 of the first cycle device is connected to the first heat medium taken out of the condenser heat transfer tube 31 of the second cycle device. Since the regeneration air comes in contact with the heater at a higher temperature than the heater, the absorption temperature of the first cycle device becomes higher than the condensation temperature of the second cycle device. The condensed refrigerant is sent to the second evaporator 13 and evaporates. The second evaporator 13 uses a heat medium such as cold water and a heat transfer tube 33 because the second heat evaporator 13 uses the heat of evaporation absorbed during the evaporation.
Heat exchanged.

Next, the operation when the absorption heat pump configured as described above is combined with the desiccant air conditioning will be described.
FIG. 3 is a Mollier diagram showing an operation state of an air conditioning part of the embodiment applicable to FIG.

The operation of the desiccant air conditioner of this embodiment will be described.
The air (process air) 1 passes through the path 107 and
Then, the pressure is increased and the pressure is sent to the desiccant rotor 103 via the path 108. The moisture in the air is adsorbed by the desiccant rotor's moisture absorbent, and the absolute humidity is reduced. At the time of adsorption, the temperature of the air rises due to the heat of adsorption. The air whose humidity has decreased and its temperature has increased is sent to the sensible heat exchanger 104 via the path 109 and cooled by exchanging heat with outside air (regenerated air). The cooled air is sent to a cooler 115 via a path 110 and further cooled. The cooled processing air is sent to the humidifier 105, and its temperature is lowered in the isenthalpy process by water injection or vaporization humidification, and is returned to the air-conditioned space 101 via the path 111.

The desiccant is reproduced as follows.
The outside air (OA) is sucked into the blower 130 via the path 124 and is boosted and sent to the sensible heat exchanger 104, where it cools the processing air to increase its temperature, and passes through the path 125 to the next sensible heat exchanger 121. And heat exchange with hot air after regeneration to increase the temperature. Further, the regenerated air exiting from the sensible heat exchanger 121 flows into the first heater 220 via the path 126, and is heated by hot water using the heat of condensation of the second cycle device of the absorption heat pump as a heating source to about 60 ° C. The temperature rises,
Next, it flows into the second heater 230 via the path 252 and
Is further heated by warm water using the heat of absorption of the cycle device as a heating source, the temperature rises to about 75 ° C., and the relative humidity decreases. This process is a change in the sensible heat of the regenerated air. The specific heat of the air is significantly lower than that of the hot water and the temperature change is large.
Even if the heater of (1) is operated at a lower temperature than the second heater, the heat exchange is performed efficiently. Therefore, the second absorption heat pump
The condensing temperature of the first cycle device can be lower than the absorption temperature of the first cycle device, thereby lowering the pressure and temperature of the first regenerator 2 of the first cycle device. Therefore, the amount of heating of the first cycle device to the first regenerator 2 is reduced.

In this embodiment, the same effects as in the embodiment of FIG. 1 can be obtained. The regenerated air having a reduced relative humidity after exiting the hot water heat exchanger 120 passes through the desiccant rotor 103 to remove moisture from the desiccant rotor and perform a regeneration operation. The regenerated air that has passed through the desiccant rotor 103 flows into the sensible heat exchanger 121 via a path 128, performs the residual heat of the regenerated air before regeneration, and is then discarded as exhaust through a path 129.

The process so far can be described with reference to the Mollier diagram in FIG. 3 as in the embodiment of FIG.
A description of the energy saving effect of this embodiment is omitted.

As described above, also in the present embodiment, the first
Heat of a heat quantity corresponding to the sum of the drive input heat quantity applied to the regenerator of the first cycle apparatus and the heat of evaporation of the second cycle apparatus, the heat of condensation of the first cycle apparatus and the heat of absorption of the second cycle apparatus 60-80 for desiccant regeneration in the form of
Can be used as a heating source at an intermediate temperature of about ℃,
Further, the heat of evaporation of the evaporator of the second cycle device is used for cooling the air performed during the desiccant air conditioning cycle.
Because it can be used as a cooling heat source of about 5 ° C,
The primary energy required for desiccant regeneration can be saved, and the effect of increasing the cooling effect can be obtained.

[0052]

As described above, according to the present invention, the heat of the processing air of the desiccant air conditioning can be pumped up by the heat pump function of the absorption heat pump and used for heating the regeneration air. The amount of heat that needs to be added from is greatly reduced, and the operating coefficient can be significantly improved. Therefore, according to the present invention, it is possible to provide a desiccant air-conditioning apparatus that reduces the consumption of heat source energy for cooling and is excellent in economy, and cools air using a conventional double effect absorption refrigerator. It is possible to provide an air conditioning system that exceeds the operating coefficient of the air conditioning system to be dehumidified, that is, energy efficiency.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a basic configuration of an embodiment of a desiccant air conditioner according to the present invention.

FIG. 2 is an explanatory diagram showing, as a During diagram, an absorption solution cycle device of one embodiment of the absorption heat pump according to the embodiment of FIG.

FIG. 3 is an explanatory diagram showing a desiccant air-conditioning cycle of air according to the embodiment of FIG. 1 in a Mollier diagram.

FIG. 4 is an explanatory diagram showing a basic configuration of another embodiment of the desiccant air conditioner according to the present invention.

FIG. 5 is an explanatory diagram showing a basic configuration of a conventional desiccant air conditioner.

FIG. 6 is an explanatory diagram showing a Mollier diagram of a conventional desiccant air conditioning cycle for desiccant air conditioning.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st absorber 2 ... 1st regenerator 3 ... 1st evaporator 4 ... 1st condenser 5 ... 1st heat exchanger 6 ... Solution pump 7 Throttling mechanism 11 Absorber 12 Second regenerator 13 Second evaporator 14 Second condenser 15 Second heat exchanger 16 Solution pump 17 Throttling mechanism 20 Heat transfer tube (heat exchange device) 21 Heat transfer tube (heat exchange device) 30 Heat transfer tube (heat exchange) 31) Heat transfer tube (heat exchange mechanism) 32 ... Heat medium (hot water) path 33 ... Heat transfer tube (heat exchange mechanism) 34 ... Heat transfer tube (heat exchange mechanism) 101 ... Air conditioning Space 102: Blower 103: Desiccant rotor 104: Sensible heat exchanger 105: Humidifier 106: Water supply pipe 107: Air path 1 08 ... air path 109 ... air path 110 ... air path 111 ... air path 115 ... cooler (cold water heat exchanger) 117 ... cold water path (cooling path) 118 ... Cold water path 119 Air path 120 Heater (hot water heat exchanger) 121 Sensible heat exchanger 122 Hot water path (heating path) 123 Hot water path 124 Air Path 125 ・ ・ ・ Air path 126 ・ ・ ・ Air path 127 ・ ・ ・ Air path 128 ・ ・ ・ Air path 129 ・ ・ ・ Air path 130 ・ ・ ・ Blower 150 ・ ・ ・ Hot water pump 160 ・ ・ ・ Cold water pump 220 ・..First heater (hot water heat exchanger) 221 hot water path 222 hot water path 230 second heater (hot water heat exchanger) 231 hot water path 232. Hot water path 250 ・ ・ ・Water pump 251: Hot water pump 252: Air path a: State point of absorption refrigeration cycle b: State point of absorption refrigeration cycle c: State point of absorption refrigeration cycle d ...・ State point of absorption refrigeration cycle e ・ ・ ・ State point of absorption refrigeration cycle f ・ ・ ・ State point of absorption refrigeration cycle A ・ ・ ・ State point of absorption refrigeration cycle B ・ ・ ・ State point of absorption refrigeration cycle C ・ ・・ State point of absorption refrigeration cycle D ・ ・ ・ State point of absorption refrigeration cycle E ・ ・ ・ State point of absorption refrigeration cycle F ・ ・ ・ State point of absorption refrigeration cycle K ・ ・ ・ State point of air of desiccant air conditioning L ・..Air state point of desiccant air conditioning M: Air state point of desiccant air conditioning N: Air state point of desiccant air conditioning P: Air state point of desiccant air conditioning Q: Air of desiccant air conditioning Shape State point R: State point of air of desiccant air conditioning S: State point of air of desiccant air conditioning T: State point of air of desiccant air conditioning U: State point of air of desiccant air conditioning V ... Air state point of desiccant air conditioning X: Air state point of desiccant air conditioning SA: Supply air RA: Return air EX: Exhaust OA: Outside air ΔQ: Cooling effect Δq: Refrigeration effect of absorption heat pump ΔH ・ ・ ・ Amount of heating by hot water

Claims (3)

(57) [Claims] 1. A first cycle device for performing an absorption refrigeration cycle including a first evaporator, a first absorber, a first regenerator, and a first condenser; and a second evaporator. A second cycle device for performing an absorption refrigeration cycle operating at a lower temperature than the absorption refrigeration cycle of the first cycle device, comprising a second absorber, a second regenerator, and a second condenser. A desiccant air conditioner using the absorption heat pump configured as a heat source; a desiccant that adsorbs moisture of the processing air supplied to the air-conditioned space, the heat of absorption of the first absorber and the heat of condensation of the second condenser. A desiccant regenerated as a heat source; and configured to use the heat of absorption of the second absorber as the heat of evaporation of the first evaporator;
Being configured to use the heat of condensation of the first condenser for heating in the second regenerator; and configured to cool the process air with the heat of evaporation of the second evaporator. Features; Desiccant air conditioner. 2. A heating path for flowing a medium for conveying heat of absorption of the first absorber and heat of condensation of the second condenser for regenerating the desiccant, wherein the heating path comprises:
2. The device according to claim 1, wherein the absorption solution temperature of the first absorber is higher than the refrigerant condensation temperature of the second condenser. 3.
The desiccant air conditioner according to the above. Sensible heat exchange to the process air and the regeneration air and the heat exchange medium; wherein the desiccant is the process air and the regeneration air and the desiccant rotor configured to and to be able to contact the selective The regeneration air in contact with the desiccant is heated by the heating source on the way from the sensible heat exchanger to the desiccant rotor, and the processing air supplied to the air-conditioned space is subjected to the sensible heat exchange. 3. The desiccant air conditioner according to claim 1, wherein the cooling is performed on the way from the container to the air conditioning space. 4.