EP3264009B1 - Control device, control method, and computer program - Google Patents

Control device, control method, and computer program Download PDF

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Publication number
EP3264009B1
EP3264009B1 EP16779897.4A EP16779897A EP3264009B1 EP 3264009 B1 EP3264009 B1 EP 3264009B1 EP 16779897 A EP16779897 A EP 16779897A EP 3264009 B1 EP3264009 B1 EP 3264009B1
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EP
European Patent Office
Prior art keywords
heat pump
variation amount
temperature
pump device
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16779897.4A
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German (de)
English (en)
French (fr)
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EP3264009A1 (en
EP3264009A4 (en
Inventor
Masahiro Teraoka
Takuya Okada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems Ltd
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Publication of EP3264009A1 publication Critical patent/EP3264009A1/en
Publication of EP3264009A4 publication Critical patent/EP3264009A4/en
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Publication of EP3264009B1 publication Critical patent/EP3264009B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/003—Indoor unit with water as a heat sink or heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0314—Temperature sensors near the indoor heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/06—Several compression cycles arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21161—Temperatures of a condenser of the fluid heated by the condenser

Definitions

  • the present invention relates to a control device, a control method, and a computer program.
  • each of a plurality of heat pump devices heats water circulating through water piping.
  • the related art is disclosed in PTL 1.
  • the device disclosed in PTL 1 attempts to attain efficient operation and improvement in reliability in the heat pump system in which each of the plurality of heat pump devices heats water circulating through water piping.
  • the circulating water becomes higher in pressure at a high temperature as the heat pump device in the heat pump system is located further downstream in a water circulation path.
  • Each of the heat pump devices needs to raise the temperature of water by performing heat exchange while the water passes through the inside of the device itself.
  • downsizing is considered in order to reduce a material cost.
  • the capacity (volume) of a heat exchanger through which a refrigerant passes is reduced. For this reason, the pressure of the refrigerant in the heat exchanger becomes higher as the heat pump device is located further downstream in the water circulation path and as the heat pump device becomes smaller.
  • the present invention has an object to provide a control device, a control method, and a computer program which can solve the above problem.
  • control device According to a first aspect of the present invention, there is provided a control device according to claim 1.
  • the variation amount allocation determining unit may determine a variation amount allocated to the plurality of heat pump devices other than the most downstream heat pump device such that a variation amount allocated to the most downstream heat pump device at a timing when the temperature of the water at the output of the most downstream heat pump device exceeds a second set temperature is smaller than the variation amount at the normal time, in a case where the target temperature of the water at the output of the most downstream heat pump device exceeds the first set temperature.
  • control device may further include: a variation amount allocation setting unit that sets the allocated variation amounts which are allocated to the most downstream heat pump device and the plurality of heat pump devices other than the most downstream heat pump device, on the basis of the allocated variation amount determined by the variation amount allocation determining unit.
  • control device the control method and the computer program described above, it is possible to use inexpensive parts in a heat exchanger of the heat pump device located furthest downstream, among a plurality of heat pump devices connected in series in a heat pump system, and it is possible to perform downsizing of the heat pump system and a reduction in the manufacturing cost of the heat pump system.
  • a heat pump system 1 is provided with a facility 10, a first heat pump device 20a1, a second heat pump device 20a2, ..., a (n-1)-th heat pump device 20a(n-1), an n-th heat pump device 20an, a control device 30, and water piping 40, as shown in Fig. 1 .
  • the facility 10 changes the temperature of water by ⁇ T.
  • the facility 10 is an office, a factory, or the like, and in the facility 10, the temperature of water is changed by ⁇ T by using an air conditioner, boiler equipment, a freezer, or the like.
  • lowering the temperature of water by ⁇ T it means cooling of water.
  • raising the temperature of water by ⁇ T it means heating of water.
  • the facility 10 outputs, for example, water with the temperature lowered by ⁇ T to the first heat pump device 20a1 through the water piping 40. Further, water is input from the n-th heat pump device 20an to the facility 10 through the water piping 40. For example, the water heated to a water temperature which is required for the facility 10 is supplied from the n-th heat pump device 20an to the facility 10 through the water piping 40.
  • the first heat pump device 20a1 heats the water input from the facility 10 by heat exchange.
  • the first heat pump device 20a1 outputs the heated water to the second heat pump device 20a2 through the water piping 40.
  • the second heat pump device 20a2 heats the water input from the first heat pump device 20a1 by heat exchange.
  • the second heat pump device 20a2 outputs the heated water to a third heat pump device 20a3 through the water piping 40.
  • the third heat pump device 20a3 heats the water input from the second heat pump device 20a2 by heat exchange.
  • the third heat pump device 20a3 outputs the heated water to a fourth heat pump device 20a4 through the water piping 40.
  • the (n-1)-th heat pump device 20a(n-1) heats the water input from the (n-2)-th heat pump device 20a(n-2) by heat exchange.
  • the (n-1)-th heat pump device 20a(n-1) outputs the heated water to the n-th heat pump device 20an through the water piping 40.
  • the n-th heat pump device 20an is the most downstream heat pump device disposed furthest downstream in a water circulation path.
  • the n-th heat pump device 20an heats the water input from the (n-1)-th heat pump device 20a(n-1) by heat exchange.
  • the n-th heat pump device 20an outputs the heated water to the facility 10 through the water piping 40.
  • the first heat pump device 20a1, the second heat pump device 20a2, ..., the (n-1)-th heat pump device 20a(n-1), and the n-th heat pump device 20an are collectively referred to as a heat pump device 20.
  • an arrow in the water piping 40 indicates a flow direction of water in the water circulation path.
  • the control device 30 controls each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the n-th heat pump device 20an. Specifically, the control device 30 determines a target outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1), that is, allocation of a variation amount in each heat pump device, on the basis of a temperature decrease ⁇ T of water in the facility 10, equipment capacity indicating the capacity of varying a water temperature, of each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the n-th heat pump device 20an, an input water temperature of the first heat pump device 20a1 disposed furthest upstream, and a target outlet water temperature of the n-th heat pump device 20an disposed furthest downstream.
  • the allocation of the variation amount is an amount indicating the variation amount of a water temperature in which the variation amount ⁇ T of the water temperature in the facility 10 (in this case, the temperature decrease ⁇ T of water in the facility 10) is allocated to each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1), and is a variation amount which is shown by a difference between the target outlet water temperature and the inlet water temperature in each heat pump device.
  • the control device 30 generates a control command for the allocation of the variation amount in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1) on the basis of each of the target outlet water temperature, the actually measured value of the inlet water temperature, and the actually measured value of the outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1).
  • the control device 30 transmits the generated control command to the corresponding heat pump device 20.
  • a broken line indicates a communication path between each of the heat pump devices 20 and the control device 30.
  • the control device 30 transmits and receives information to and from the facility 10 through the communication path.
  • the control device 30 transmits a control signal for the target outlet water temperature or the like to the heat pump device 20 through this communication path.
  • the communication path may be wired or wireless.
  • Each of the heat pump devices 20 is provided with a compressor 201, a four-way valve 202, a water heat exchanger 203, an expansion valve 204, an air heat exchanger 205, an accumulator 206, a refrigerant pipe 207, a first temperature sensor 208, and a second temperature sensor 209, as shown in Fig. 2 .
  • the compressor 201, the four-way valve 202, the water heat exchanger 203, the expansion valve 204, the air heat exchanger 205, and the accumulator 206 are connected by the refrigerant pipe 207 to configure a refrigerant circuit.
  • the compressor 201 is provided between the four-way valve 202 and the accumulator 206.
  • a motor is driven by an inverter.
  • the rotational speed of the motor that is, the discharge amount of the refrigerant is adjusted by the output frequency of the inverter.
  • the water heat exchanger 203 performs heat exchange between the water in the water piping 40 through which water flows from the heat pump device 20 on the upstream side to the heat pump device 20 on the downstream side, and the refrigerant in the refrigerant pipe 207 between the four-way valve 202 and the expansion valve 204.
  • the expansion valve 204 is provided between the water heat exchanger 203 and the air heat exchanger 205.
  • the expansion valve 204 converts a liquid refrigerant having a pressure P, which is input at a certain temperature T, to a refrigerant having a pressure lower than the pressure P at a temperature lower than the temperature T.
  • the air heat exchanger 205 is provided between the four-way valve 202 and the expansion valve 204.
  • the air heat exchanger 205 performs heat exchange between the outside air and the refrigerant.
  • the accumulator 206 is provided between the compressor 201 and the four-way valve 202.
  • the accumulator 206 prevents the refrigerant that has not been completely gasified in an evaporator (the water heat exchanger 203 or the air heat exchanger 205) from being drawn into the compressor 201 in a liquid state.
  • the first temperature sensor 208 is provided at the inlet of the water piping 40 in the water heat exchanger 203 through which water flows from the heat pump device 20 on the upstream side (in the case of the first heat pump device 20a1, from the facility 10).
  • the water temperature detected by the first temperature sensor 208 is transmitted to the control device 30 as the actually measured value of the inlet water temperature in the water piping 40.
  • the second temperature sensor 209 is provided at the outlet of the water piping 40 in the water heat exchanger 203 through which water flows to the heat pump device 20 on the downstream side (in the case of the n-th heat pump device 20an, to the facility 10).
  • the water temperature detected by the second temperature sensor 209 is transmitted to the control device 30 as the actually measured value of the output water temperature in the water piping 40.
  • a heating operation and a cooling (or defrosting) operation are switched by switching the four-way valve 202 to change the flow direction of the refrigerant.
  • the refrigerant discharged from the compressor 201 flows through the water heat exchanger 203, the expansion valve 204, the air heat exchanger 205, and the accumulator 206 in this order.
  • the water heat exchanger 203 acts as a condenser and the air heat exchanger 205 acts as an evaporator. Then, the water heated in the water heat exchanger 203 is output to the next heat pump device 20 on the downstream side in the water circulation path or the facility 10 through the water piping 40.
  • control device 30 The configuration of the control device 30 according to this embodiment will be described.
  • the control device 30 is provided with a communication unit 301, a storage unit 302, a communication control unit 303, a temperature variation control unit 304, a variation amount allocation determining unit 305, a variation amount reading unit 306, and a variation amount allocation setting unit 307, as shown in Fig. 3 .
  • the communication unit 301 transmits and receives information necessary for the control device 30 to control each of the heat pump devices 20 to and from each of the heat pump devices 20. For example, the communication unit 301 receives the actually measured value of the inlet water temperature detected by the first temperature sensor 208 in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1), and the actually measured values of the outlet water temperature detected by the second temperature sensor 209 in each heat pump device. Further, the communication unit 301 transmits the control command to each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1).
  • the storage unit 302 stores various kinds of information necessary for the processing to be performed by the control device 30.
  • a data table TBL1 showing the variation amount of the water temperature to be varied in all of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the n-th heat pump device 20an is stored in the storage unit 302 in advance.
  • the variation amount of the water temperature to be varied in all of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the n-th heat pump device 20an is, for example, the variation amount ⁇ T of the water temperature to be cooled in the facility 10.
  • the communication control unit 303 controls communication which is performed by the control device 30 through the communication unit 301. Even in a case where the fact that the communication control unit 303 controls the communication which is performed through the communication unit 301 of the control device 30 is not specifically described in the following description, the communication control unit 303 controls the communication which is performed by the control device 30 through the communication unit 301.
  • the temperature variation control unit 304 determines the target outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1) on the basis of the variation amount ⁇ T of the water temperature in the facility 10, the equipment capacity of each of the heat pump devices 20, the input water temperature of the first heat pump device 20a1 disposed furthest upstream, and the target outlet water temperature of the n-th heat pump device 20an disposed furthest downstream.
  • the temperature variation control unit 304 generate a control command for each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1) on the basis of the variation amount ⁇ T of the water temperature in the facility 10, the equipment capacity of each of the heat pump devices 20, the variation amount ⁇ T of the water temperature in the facility 10, and each of the target outlet water temperature, the actually measured value of the inlet water temperature, and the actually measured value of the outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1).
  • the control device 30 transmits the generated control command to the corresponding heat pump device 20 and controls the heat pump device 20.
  • the temperature variation control unit 304 generates a control command for varying the temperature of water on the basis of the variation amount ⁇ T of the water temperature in the facility 10, the equipment capacity of each of the heat pump devices 20, the variation amount ⁇ T of the water temperature in the facility 10, and each of the target outlet water temperature, the actually measured value of the inlet water temperature, and the actually measured value of the outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1) and performs control.
  • temperature variation control unit 304 generates a control command for varying the temperature of the water by the allocation of the variation amount which is set to each of the heat pump devices 20 by the variation amount allocation setting unit 307, and controls each of the heat pump devices 20.
  • the variation amount allocation determining unit 305 determines the allocation of the variation amounts of the heat pump devices 20 other than the n-th heat pump device 20an such that the variation amount allocated to the n-th heat pump device 20an is smaller than the variation amount allocated at the normal time, with respect to the allocation of the variation amounts of the n-th heat pump device 20an disposed furthest downstream in the water circulation path, among the heat pump devices 20, and each of the heat pump devices 20 other than the n-th heat pump device 20an.
  • the variation amount allocation determining unit 305 equally divides the variation amount read from the storage unit 302 by the variation amount reading unit 306 by the number n of the heat pump devices 20, at the normal time, and determines the allocation of the variation amounts of the heat pump devices 20 other than the n-th heat pump device 20an such that the variation amount allocated to the n-th heat pump device 20an is smaller than the variation amount allocated at the normal time, at a predetermined timing.
  • the variation amount allocation determining unit 305 determines the allocation of the variation amounts of the heat pump devices 20 other than the n-th heat pump device 20an such that the variation amount allocated to the n-th heat pump device 20an is smaller than the variation amount allocated at the normal time, at the predetermined timing.
  • the variation amount allocation determining unit 305 may determine the allocation of the variation amounts of the heat pump devices 20 other than the n-th heat pump device 20an such that the variation amount allocated to the n-th heat pump device 20an is smaller than the variation amount allocated at the normal time, at a timing when the actually measured value of the temperature of water at the output of the n-th heat pump device 20an exceeds a second set temperature.
  • the variation amount reading unit 306 reads the variation amount for varying the temperature of water in all of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the n-th heat pump device 20an, from the storage unit 302. For example, the variation amount reading unit 306 reads the data table TBL1 from the storage unit 302.
  • the variation amount allocation setting unit 307 sets the allocation of the variation amounts to be allocated to the n-th heat pump device 20an and the heat pump devices 20 other than the n-th heat pump device 20an on the basis of the allocation of the variation amount determined by the variation amount allocation determining unit 305.
  • the data table TBL1 shows the variation amount ⁇ T for varying the temperature of water in all of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the n-th heat pump device 20an.
  • the data table TBL1 shows the correspondence relationship between the respective facilities (the facility 10, a facility 300, ...) and the variation amount ⁇ T of the temperature of water in each facility, as shown in Fig. 4 .
  • a processing flow of Fig. 5 showing the processing of the control device 30 which heats water by controlling each of the heat pump devices 20 in a case where in the heat pump system 1 according to this embodiment, the facility 10 cools water and the temperature of the water is lowered by ⁇ T will be described. It is known in advance that the facility 10 cools water which is input from the n-th heat pump device 20an through the water piping 40 and lowers the temperature of the water by ⁇ T, and the storage unit 302 stores the variation amount ⁇ T in the data table TBL1.
  • the variation amount ⁇ T recorded in the data table TBL1 of the storage unit 302 by the facility 10 is the variation amount for varying the temperature of water in all of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the n-th heat pump device 20an.
  • the variation amount reading unit 306 reads the variation amount ⁇ T corresponding to the facility 10 from the data table TBL1 of the storage unit 302 (step S1). For example, in the case of the data table TBL1 shown in Fig. 4 , the variation amount reading unit 306 searches the facility 10 in order from the top of the facilities in the data table TBL1 to specify it and specifies and reads a variation amount ⁇ T1 corresponding to the specified facility 10 as the variation amount ⁇ T of the facility 10.
  • the variation amount reading unit 306 outputs the read variation amount ⁇ T to the variation amount allocation determining unit 305.
  • the variation amount allocation determining unit 305 determines the allocation of the variation amount of each of the heat pump devices 20 at the normal time on the basis of the input variation amount ⁇ T, the equipment capacity of each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the n-th heat pump device 20an, the input water temperature of the first heat pump device 20a1 disposed furthest upstream, and the target outlet water temperature of the n-th heat pump device 20an disposed furthest downstream (step S2).
  • the variation amount allocation determining unit 305 determines, at the normal time, allocation ⁇ T ⁇ n of the variation amount obtained by equally dividing the variation amount ⁇ T by the number n of the heat pump devices 20 as the allocation of the variation amount of each of the heat pump devices 20.
  • the variation amount allocation determining unit 305 outputs the allocation of the variation amount of each of the heat pump devices 20 determined at the normal time to the variation amount allocation setting unit 307.
  • the variation amount allocation setting unit 307 sets the input allocation of the variation amount of each of the heat pump devices 20 to each of the heat pump devices 20 (step S3). For example, in a case where the variation amount allocation determining unit 305 determines the allocation of the variation amount of each of the heat pump devices 20 to be ⁇ T ⁇ n, the variation amount allocation setting unit 307 sets the allocation of the variation amount of each of the heat pump devices 20 at the normal time to be ⁇ T ⁇ n.
  • the temperature variation control unit 304 If the variation amount allocation setting unit 307 sets the allocation of the variation amount of each of the heat pump devices 20 at the normal time, the temperature variation control unit 304 generates a control command for varying the temperature of water, on the basis of the variation amount ⁇ T of the water temperature in the facility 10, the equipment capacity of each of the heat pump devices 20, the variation amount ⁇ T of the water temperature in the facility 10, and each of the target outlet water temperature, the actually measured value of the inlet water temperature, and the actually measured value of the outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1), and controls each of the heat pump devices 20 (step S4).
  • each of the heat pump devices 20 outputs water heated and having increased pressure to the heat pump device 20 on the downstream side in the water circulation path or the facility 10.
  • the variation amount allocation determining unit 305 determines whether or not the predetermined timing has been reached when each of the heat pump devices 20 heats water and outputs the increased pressure at the normal time (step S5). Specifically, for example, the variation amount allocation determining unit 305 determines whether or not a timing at which the target temperature of water at the output of the n-th heat pump device 20an exceeds the first set temperature and the actually measured value of the temperature of water at the output of the n-th heat pump device 20an exceeds the second set temperature has been reached.
  • the variation amount allocation determining unit 305 determines whether or not a timing at which the target temperature of water at the output of the n-th heat pump device 20an exceeds the first set temperature, 55 degrees, (for example, the target temperature of water is 60 degrees) and the actually measured value of the temperature of water at the output of the n-th heat pump device 20an exceeds the second set temperature, 50 degrees, has been reached.
  • step S5 the variation amount allocation determining unit 305 returns to the processing of step S5.
  • the variation amount allocation determining unit 305 determines the allocation of the variation amounts of the heat pump devices 20 other than the n-th heat pump device 20an such that the variation amount allocated to the n-th heat pump device 20an is smaller than the variation amount allocated at the normal time (step S6).
  • the variation amount allocation determining unit 305 determines the allocation of the variation amount of the n-th heat pump device 20an to be lower than ⁇ T ⁇ n and performs a determination such that the allocation of the variation amounts of one or more heat pump devices 20 other than the n-th heat pump device 20an is increased by an amount corresponding to the decrease in the allocation of the variation amount of the n-th heat pump device 20an.
  • the variation amount allocation determining unit 305 determines the allocation of the variation amount which is lower than the allocation of the variation amount of the n-th heat pump device 20an at the normal time and can be easily realized per unit time even in the high-temperature and high-pressure state in the n-th heat pump device 20an.
  • the variation amount allocation determining unit 305 outputs the determined allocation of the variation amount of each of the heat pump device 20 to the variation amount allocation setting unit 307.
  • the variation amount allocation setting unit 307 sets the input allocation of the variation amount of each of the heat pump devices 20 to each of the heat pump devices 20 (step S7).
  • the temperature variation control unit 304 If the variation amount allocation setting unit 307 sets the allocation of the variation amount of each of the heat pump devices 20 determined at the predetermined timing, the temperature variation control unit 304 generates a control command for varying the temperature of water, on the basis of the variation amount ⁇ T of the water temperature in the facility 10, the equipment capacity of each of the heat pump devices 20, the variation amount ⁇ T of the water temperature in the facility 10, and each of the target outlet water temperature, the actually measured value of the inlet water temperature, and the actually measured value of the outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1), and controls each of the heat pump devices 20 (step S8).
  • the number n of the heat pump devices 20 may be any number as long as it is two or more.
  • the temperature variation control unit 304 generates a control command for varying the temperature of water, on the basis of the variation amount ⁇ T of the water temperature in the facility 10, the equipment capacity of each of the heat pump devices 20, the variation amount ⁇ T of the water temperature in the facility 10, and each of the target outlet water temperature, the actually measured value of the inlet water temperature, and the actually measured value of the outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1), and controls each of the heat pump devices 20.
  • the variation amount allocation determining unit 305 determines the allocation of the variation amount of the heat pump devices 20 other than the n-th heat pump device 20an such that the variation amount allocated to the n-th heat pump device 20an is smaller than the variation amount allocated at the normal time, with respect to the allocation of the variation amounts of the n-th heat pump device 20an disposed furthest downstream in the water circulation path, among the heat pump devices 20, and each of the heat pump devices 20 other than the n-th heat pump device 20an.
  • the heat pump system 1 is provided with the facility 10, the first heat pump device 20a1, the second heat pump device 20a2, ..., the (n-1)-th heat pump device 20a(n-1), the n-th heat pump device 20an, the control device 30, and the water piping 40, as shown in Fig. 6 , similar to the heat pump system 1 according to the first embodiment.
  • the facility 10 in this embodiment is provided with a temperature sensor 101, a temperature sensor 102, a temperature difference calculation unit 103, and a temperature difference transmitter 104, in addition to the facility 10 in the first embodiment.
  • the temperature sensor 101 is installed at an input portion of the water piping 40 from the n-th heat pump device 20an and detects the temperature of the water in the water piping 40.
  • the temperature sensor 102 is installed at an output portion of the water piping 40 to the first heat pump device 20a1 and detects the temperature of the water in the water piping 40.
  • the temperature difference calculation unit 103 calculates the decrease temperature ⁇ T of the water in the facility 10 by subtracting the temperature of the water detected by the temperature sensor 102 from the temperature detected by the temperature sensor 101.
  • the temperature difference transmitter 104 transmits the decrease temperature ⁇ T of the water in the facility 10 calculated by the temperature difference calculation unit 103 to the control device 30.
  • Each of the communication unit 301, the communication control unit 303, the temperature variation control unit 304, the variation amount allocation determining unit 305, the variation amount reading unit 306, and the variation amount allocation setting unit 307 provided in the control device 30 performs processing in real time by using the decrease temperature ⁇ T of the water in the facility 10, which is transmitted in real time by the temperature difference transmitter 104 through the communication unit 301, instead of the water temperature ⁇ T lowered by the facility 10, shown in the data table TBL1 stored in the storage unit 302.
  • Others are the same as those in the control device 30 according to the first embodiment, and the processing flow of the control device 30 according to this embodiment is also the same as the processing flow of the control device 30 according to the first embodiment.
  • the temperature variation control unit 304 generates a control command for varying the temperature of water, on the basis of the variation amount ⁇ T of the water temperature in the facility 10, the equipment capacity of each of the heat pump devices 20, the variation amount ⁇ T of the water temperature in the facility 10, and each of the target outlet water temperature, the actually measured value of the inlet water temperature, and the actually measured value of the outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1), and controls each of the heat pump devices 20.
  • the variation amount allocation determining unit 305 determines the allocation of the variation amount of the heat pump devices 20 other than the n-th heat pump device 20an such that the variation amount allocated to the n-th heat pump device 20an is smaller than the variation amount allocated at the normal time, with respect to the allocation of the variation amounts of the n-th heat pump device 20an disposed furthest downstream in the water circulation path, among the heat pump devices 20, and each of the heat pump devices 20 other than the n-th heat pump device 20an.
  • the temperature sensor 101 is installed at the input portion of the water piping 40 from the n-th heat pump device 20an and detects the temperature of the water in the water piping 40.
  • the temperature sensor 102 is installed at the output portion of the water piping 40 to the first heat pump device 20a1 and detects the temperature of the water in the water piping 40.
  • the temperature difference calculation unit 103 calculates the variation amount ⁇ T (the decrease temperature ⁇ T of the water) in the facility 10 by subtracting the temperature of the water detected by the temperature sensor 102 from the temperature detected by the temperature sensor 101.
  • the temperature difference transmitter 104 transmits the variation amount ⁇ T in the facility 10 calculated by the temperature difference calculation unit 103 to the control device 30.
  • Each of the communication unit 301, the communication control unit 303, the temperature variation control unit 304, the variation amount allocation determining unit 305, the variation amount reading unit 306, and the variation amount allocation setting unit 307 provided in the control device 30 performs processing in real time by using the variation amount ⁇ T in the facility 10, which is transmitted in real time by the temperature difference transmitter 104 through the communication unit 301, instead of the variation amount ⁇ T in the facility 10, shown in the data table TBL1 stored in the storage unit 302.
  • the heat pump system 1 is provided with the facility 10, the first heat pump device 20a1, the second heat pump device 20a2, ..., the (n-1)-th heat pump device 20a(n-1), the n-th heat pump device 20an, the control device 30, and the water piping 40, as shown in Fig. 1 , similar to the heat pump system 1 according to the first embodiment.
  • control device 30 according to this embodiment is provided with an outside air temperature measuring unit 308 in addition to the control device 30 according to the first embodiment, as shown in Fig. 7 .
  • the outside air temperature measuring unit 308 detects the outside air temperature of the heat pump device 20 provided with the outside air temperature measuring unit 308.
  • the variation amount allocation determining unit 305 provided in the control device 30 acquires the outside air temperature detected by the outside air temperature measuring unit 308 provided in each of the heat pump devices 20. Then, the variation amount allocation determining unit 305 corrects the influence of the acquired outside air temperature on a temperature change of the water in each of the heat pump devices 20 and determines the allocation of the variation amount of each of the heat pump devices 20. Others are the same as those in the control device 30 according to the first embodiment, and the processing flow of the control device 30 according to this embodiment is also the same as the processing flow of the control device 30 according to the first embodiment.
  • the temperature variation control unit 304 generates a control command for varying the temperature of water on the basis of the variation amount ⁇ T of the water temperature in the facility 10, the equipment capacity of each of the heat pump devices 20, the variation amount ⁇ T of the water temperature in the facility 10, and each of the target outlet water temperature, the actually measured value of the inlet water temperature, and the actually measured value of the outlet water temperature in each of the first heat pump device 20a1, the second heat pump device 20a2, ..., and the (n-1)-th heat pump device 20a(n-1), and controls each of the heat pump devices 20.
  • the variation amount allocation determining unit 305 determines the allocation of the variation amount of the heat pump devices 20 other than the n-th heat pump device 20an such that the variation amount allocated to the n-th heat pump device 20an is smaller than the variation amount allocated at the normal time, with respect to the allocation of the variation amounts of the n-th heat pump device 20an disposed furthest downstream in the water circulation path, among the heat pump devices 20, and each of the heat pump devices 20 other than the n-th heat pump device 20an.
  • control device 30 is provided with the outside air temperature measuring unit 308 in addition to the control device 30 according to the first embodiment.
  • the outside air temperature measuring unit 308 detects the outside air temperature of the heat pump device 20 provided with the outside air temperature measuring unit 308.
  • the variation amount allocation determining unit 305 provided in the control device 30 acquires the outside air temperature detected by the outside air temperature measuring unit 308 provided in each of the heat pump devices 20. Then, the variation amount allocation determining unit 305 corrects the influence of the acquired outside air temperature on a temperature change of the water in each of the heat pump devices 20 and determines the allocation of the variation amount of each of the heat pump devices 20.
  • the storage unit 302 in the embodiments of the present invention may be provided anywhere within a range where appropriate transmission and reception of information are performed. Further, a plurality of storage units 302 may be present in a range where appropriate transmission and reception of information are performed, and store data in a dispersed manner.
  • the order of processing may be changed within a range where appropriate processing is performed.
  • each of the speed control units 104 and 104a, the automatic train operation devices 102, 102a, and 102b, and the ATP device 20 described above has a computer system inside thereof.
  • the process of the processing described above is stored in a computer readable recording medium in the form of a program, and a computer reads and executes the program, whereby the above processing is performed.
  • the computer readable recording medium refers to a magnetic disk, a magnetooptical disc, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like.
  • a configuration may be made such that the computer program is delivered to a computer through a communication line and the computer which has received the delivery executes the program.
  • the computer program may be a so-called differential file (differential program) which is a file capable of realizing the above-described functions by a combination with a program already recorded in a computer system.
  • differential file differential program
  • control device the control method and the computer program described above, it is possible to use inexpensive parts in the heat exchanger of the heat pump device located furthest downstream, among the plurality of heat pump devices connected in series in the heat pump system, and it is possible to perform downsizing of the heat pump system and a reduction in the manufacturing cost of the heat pump system.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Other Air-Conditioning Systems (AREA)
EP16779897.4A 2015-04-14 2016-03-28 Control device, control method, and computer program Active EP3264009B1 (en)

Applications Claiming Priority (2)

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JP2015082357A JP6592858B2 (ja) 2015-04-14 2015-04-14 制御装置、制御方法及びプログラム
PCT/JP2016/059821 WO2016167106A1 (ja) 2015-04-14 2016-03-28 制御装置、制御方法及びプログラム

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JP7017406B2 (ja) * 2017-12-27 2022-02-08 三菱重工サーマルシステムズ株式会社 制御装置、冷凍機システム、制御方法及びプログラム
CZ309830B6 (cs) * 2022-11-22 2023-11-15 Electrotechnics s.r.o. Kovalík Zapojení tepelných čerpadel a způsob řízení tepelných čerpadel tohoto zapojení

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US3981294A (en) * 1973-11-16 1976-09-21 The Boeing Company All glass composite building panels
JP3477533B2 (ja) * 1993-04-26 2003-12-10 株式会社日立製作所 冷水供給装置
CN1226586C (zh) * 2003-08-22 2005-11-09 烟台荏原空调设备有限公司 联结式冷温水机运转台数控制方法
JP2008134013A (ja) * 2006-11-29 2008-06-12 Toyo Netsu Kogyo Kk 冷熱源機の運転制御方法及びこれを用いた冷熱源システム
JP2009168320A (ja) * 2008-01-15 2009-07-30 Chugoku Electric Manufacture Co Ltd ヒートポンプ式給湯システム
JP5283589B2 (ja) * 2009-08-31 2013-09-04 三菱電機株式会社 冷凍空調装置
JP5558400B2 (ja) * 2011-03-30 2014-07-23 三菱重工業株式会社 熱源システム及び熱源システムの台数制御方法
JP5777929B2 (ja) * 2011-04-22 2015-09-09 株式会社日立製作所 冷熱源装置の運転制御システム
JP2013002757A (ja) * 2011-06-17 2013-01-07 Hitachi Plant Technologies Ltd 熱源システムおよびその制御方法
JP5812829B2 (ja) * 2011-11-30 2015-11-17 三菱重工業株式会社 ヒートポンプシステムにおけるヒートポンプの位置確認方法及びヒートポンプシステム
JP5818985B2 (ja) * 2012-06-25 2015-11-18 三菱電機株式会社 給湯システム
JP6066648B2 (ja) * 2012-09-27 2017-01-25 三菱重工業株式会社 熱源システム及びその制御方法

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EP3264009A1 (en) 2018-01-03
CN107429951A (zh) 2017-12-01
EP3264009A4 (en) 2018-02-28
WO2016167106A1 (ja) 2016-10-20
KR101987571B1 (ko) 2019-06-10
KR20170125914A (ko) 2017-11-15
JP6592858B2 (ja) 2019-10-23
JP2016200370A (ja) 2016-12-01

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