WO2013145844A1 - Système de source de chaleur, dispositif pour le contrôler - Google Patents

Système de source de chaleur, dispositif pour le contrôler Download PDF

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Publication number
WO2013145844A1
WO2013145844A1 PCT/JP2013/052153 JP2013052153W WO2013145844A1 WO 2013145844 A1 WO2013145844 A1 WO 2013145844A1 JP 2013052153 W JP2013052153 W JP 2013052153W WO 2013145844 A1 WO2013145844 A1 WO 2013145844A1
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WIPO (PCT)
Prior art keywords
heat source
power consumption
power
demand
source system
Prior art date
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PCT/JP2013/052153
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English (en)
Japanese (ja)
Inventor
智 二階堂
上田　憲治
和島　一喜
長谷川　泰士
良枝 栂野
Original Assignee
三菱重工業株式会社
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Publication date
Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to DE112013001841.1T priority Critical patent/DE112013001841T5/de
Priority to KR1020147020839A priority patent/KR20140108576A/ko
Priority to CN201380010891.2A priority patent/CN104126098A/zh
Priority to US14/376,594 priority patent/US20140374497A1/en
Publication of WO2013145844A1 publication Critical patent/WO2013145844A1/fr

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    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
    • 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary 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
    • F24D2200/16—Waste heat
    • F24D2200/22—Ventilation air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/60—Energy consumption
    • 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
    • F25B2400/13—Economisers
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/05—Cost reduction
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a heat source system, a control device therefor, a control method therefor, a power adjustment network system, and a heat source machine control device.
  • Patent Document 1 in the demand control of a plurality of outdoor units connected to the same power line, when the current value of the power line exceeds the current limit value, the operating frequency of the compressor of one outdoor unit A method for lowering is disclosed.
  • the present invention provides a heat source system and its control device, its control method, power adjustment network system, and heat source device control device capable of suppressing the power consumption of the system to be equal to or lower than contract power when a refrigerator is used as a heat source.
  • the purpose is to provide.
  • a first aspect of the present invention is a control device applied to a heat source system including at least one heat source unit that heats or cools heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device.
  • the power monitoring means for monitoring the power consumption of the heat source system, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than contract power,
  • a control device for a heat source system comprising demand limiting means for limiting demand by increasing or decreasing the set temperature in a direction in which power consumption decreases.
  • the set temperature is set in a direction in which the power consumption of the heat source machine is reduced by the demand limiting unit. Raised or lowered.
  • the necessary refrigeration capacity is also reduced by reducing the difference between the inflow temperature of the heat source water and the water supply temperature. As a result, the power consumption of the heat source device can be suppressed.
  • the heat source device is originally controlled based on the refrigerating capacity (heat source water outlet temperature of the heat source device), the device control is smoothly performed by controlling the set temperature of the heat source water as described above. Can be done.
  • the demand limiting unit is configured such that when the power consumption of the heat source system becomes less than the second power threshold set to be equal to or lower than the first power threshold, the power consumption of the heat source machine
  • the set temperature may be decreased or increased in a direction in which the temperature increases, and when the current set temperature reaches a preset reference set temperature, the set temperature may be maintained.
  • the set temperature decreases or decreases in the direction in which the power consumption of the heat source unit increases. Raised. Thereby, the temperature of the heat source water can be brought close to the reference set temperature.
  • the demand limiting unit is configured to set the set temperature so that the set temperature does not become less than a preset lower limit value.
  • the set temperature may be raised so that the set temperature does not exceed a preset upper limit value.
  • the control device of the heat source system may include demand limit stop means for stopping demand limit by the demand limit means.
  • the demand restriction when it is not desired to implement the demand restriction, the demand restriction can be stopped by operating the demand restriction stopping means.
  • the control device of the heat source system includes an electric water supply unit that adjusts the flow rate of the heat source water sent from the external device to the heat source unit, and the demand limiting unit is configured such that the power consumption of the heat source system is the first power threshold value. It is good also as hold
  • the demand limiting means holds the rotation speed of the water supply means, so that the rotation speed of the water supply means increases. It becomes possible to prevent an increase in power consumption.
  • the demand limiting unit is configured to set a third power threshold that is set such that power consumption of the heat source system is higher than the first power threshold and lower than the contract power. When it exceeds, it is good also as stopping the operation
  • the power consumption of the heat source system exceeds the third power threshold, the operation of the predetermined heat source machine is stopped, so before the power consumption of the heat source system exceeds the contract power, The power consumption of the heat source system can be quickly reduced.
  • the demand limiting unit performs control to reduce power consumption of the electric device included in the load device during a period in which power consumption of the heat source system exceeds the first power threshold. It is good.
  • the power consumption of the electric device included in the load device is reduced by the demand control means. Can be further reduced.
  • the control device of the heat source system includes power predicting means for predicting future power consumption from the behavior of power consumption of the heat source system in a predetermined period in the past, and the demand limiting means has a predicted power consumption after a predetermined period from the present time.
  • the demand limitation may be started when the first power threshold is exceeded.
  • the future power output is predicted from the power consumption behavior of the heat source system in the past predetermined period by the power prediction means.
  • the demand limiting means limits the demand when the predicted power consumption after a predetermined period from the present time exceeds the first power threshold. Thereby, demand restriction can be performed in advance, and it is possible to prevent the power consumption of the heat source system from reaching the contract power.
  • a second aspect of the present invention is a control method applied to a heat source system including at least one heat source unit that heats or cools heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device.
  • the power consumption of the heat source system is monitored, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than the contract power, the power consumption of the heat source machine decreases.
  • This is a control method of a heat source system that performs demand limitation by increasing or decreasing the set temperature in the direction to be performed.
  • a third aspect of the present invention is a heat source system including the control device for the heat source system.
  • a heat source system comprising at least one heat source unit that heats or cools the heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device
  • the heat source system comprising: A heat source machine control means for controlling the corresponding heat source machine, and a system control means for giving a control command to each of the heat source machine control means, the system control means comprising: Power monitoring means for monitoring power consumption of the heat source system, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than contract power, demand restriction is imposed on each of the heat source device control means.
  • a notification means for notifying a start command wherein the heat source machine control means increases the set temperature in a direction in which power consumption decreases when the demand limit start command is notified.
  • the other is a heat source system comprising demand limit means for performing a demand limit by lowering.
  • a fifth aspect of the present invention includes the plurality of heat source systems and a central monitoring device connected to a control device of each of the heat source systems via a communication medium, and the control device of each of the heat source systems from the central control device. Is a power adjustment network system in which the first power threshold is notified.
  • a control device for a heat source unit that heats or cools the heat source water in accordance with a set temperature and supplies the heated or cooled heat source water to a load device, wherein the power consumption of the heat source unit is reduced.
  • the power monitoring means for monitoring and the power consumption of the heat source unit exceed a first power threshold set to a value lower than the contract power
  • the set temperature is set in a direction in which the power consumption of the heat source unit decreases.
  • It is a control device of a heat source machine comprising demand limiting means for limiting demand by raising or lowering.
  • FIG. 1 is a diagram schematically showing the configuration of a heat source system 1 according to the first embodiment of the present invention.
  • the heat source system 1 includes a load device 3, heat source devices 2 a, 2 b, 2 c, and a system control device 20.
  • FIG. 1 illustrates the case where three heat source units are installed, the number of installed heat source units can be arbitrarily determined.
  • the load device 3 is, for example, an air conditioning facility, a hot water supply facility, a factory facility, or the like.
  • the heat source devices 2a, 2b, and 2c cool or heat the heat source water based on the set temperature set by the system control device 20, and supply the heat source water after cooling or after heating to the load device 3.
  • the heat source water may be a liquid medium other than water.
  • an air conditioning facility that performs a cooling operation is assumed as the load device 3, the water that is the heat source water is cooled in the heat source devices 2 a, 2 b, and 2 c, and the cooled cold water is used as the load device 3.
  • the case of supplying to will be described as an example.
  • Cold water pumps (water supply means) 4a, 4b, and 4c for pumping the heat source water are installed on the upstream side of the heat source devices 2a, 2b, and 2c as viewed from the cold water flow.
  • the cold water from the return header 6 is sent to the heat source devices 2a, 2b, and 2c.
  • Each of the chilled water pumps 4a, 4b, and 4c is driven by an inverter motor (not shown), and thereby the variable flow rate is controlled by making the rotation speed variable.
  • the cold water collected in the supply header 5 is supplied to the load device 3.
  • the cold water that has been subjected to air conditioning by the load device 3 and raised in temperature is sent to the return header 6.
  • the cold water is branched at the return header 6 and sent to the heat source units 2a, 2b, and 2c.
  • a bypass pipe 7 is provided between the supply header 5 and the return header 6.
  • the amount of cold water supplied to the load device 3 can be adjusted by adjusting the opening degree of the bypass valve 8 provided in the bypass pipe 7.
  • FIG. 2 shows a schematic configuration when a turbo refrigerator is applied as a configuration example of the heat source units 2a, 2b, and 2c.
  • the heat source units 2a, 2b, and 2c may be unified with the same type of heat source unit, or several types of heat source units may be mixed.
  • the heat source unit 2a includes a turbo compressor 31 that compresses the refrigerant, a condenser 32 that condenses the high-temperature and high-pressure gas refrigerant compressed by the turbo compressor 31, and a liquid refrigerant condensed by the condenser 32.
  • a subcooler 33 that provides cooling, a high-pressure expansion valve 34 that expands liquid refrigerant from the subcooler 33, and an intermediate cooler that is connected to the high-pressure expansion valve 34 and to the intermediate stage of the turbo compressor 31 and the low-pressure expansion valve 35.
  • 37 and an evaporator 36 for evaporating the liquid refrigerant expanded by the low-pressure expansion valve 35.
  • the turbo compressor 31 is a centrifugal two-stage compressor, and is driven by an electric motor 39 whose rotational speed is controlled by an inverter 38.
  • the output of the inverter 38 is controlled by the heat source machine control device 10a.
  • the turbo compressor 31 may be a fixed speed compressor having a constant rotation speed.
  • An inlet guide vane (hereinafter referred to as “IGV”) 40 for controlling the flow rate of the intake refrigerant is provided at the refrigerant intake port of the turbo compressor 31 so that the capacity of the heat source unit 2a can be controlled.
  • the condenser 32 is provided with a pressure sensor 51 for measuring the condensed refrigerant pressure Pc.
  • the output of the pressure sensor 51 is transmitted to the heat source machine control device 10a.
  • the subcooler 33 is provided on the downstream side of the refrigerant flow of the condenser 32 so as to supercool the condensed refrigerant.
  • a temperature sensor 52 for measuring the refrigerant temperature Ts after supercooling is provided.
  • the condenser 32 and the subcooler 33 are inserted with a cooling heat transfer tube 41 for cooling them.
  • the cooling water flow rate F2 is measured by a flow meter 54, the cooling water outlet temperature Tcout is measured by a temperature sensor 55, and the cooling water inlet temperature Tcin is measured by a temperature sensor 56.
  • the cooling water is led to the condenser 32 and the subcooler 33 again after being exhausted to the outside in a cooling tower (not shown).
  • the intermediate cooler 37 is provided with a pressure sensor 57 for measuring the intermediate pressure Pm.
  • the evaporator 36 is provided with a pressure sensor 58 for measuring the evaporation pressure Pe.
  • Cold water having a rated temperature (for example, 7 ° C.) is obtained by absorbing heat in the evaporator 36.
  • the evaporator 36 is inserted with a cold water heat transfer tube 42 for cooling the cold water supplied to the external load 3 (see FIG. 1).
  • the cold water flow rate F1 is measured by a flow meter 59, the cold water outlet temperature Tout is measured by a temperature sensor 60, and the cold water inlet temperature Tin is measured by a temperature sensor 61.
  • a hot gas bypass pipe 43 is provided between the vapor phase portion of the condenser 32 and the vapor phase portion of the evaporator 36.
  • a hot gas bypass valve 44 for controlling the flow rate of the refrigerant flowing in the hot gas bypass pipe 43 is provided. By adjusting the hot gas bypass flow rate by the hot gas bypass valve 44, it is possible to control the capacity of a very small region that is not sufficiently controlled by the IGV 40.
  • the condenser 32 and the subcooler 33 are provided and heat is exchanged between the cooling water cooled by exhausting heat to the outside in the cooling tower and the refrigerant is described.
  • an air heat exchanger may be arranged instead of the condenser 32 and the subcooler 33, and heat may be exchanged between the outside air and the refrigerant in the air heat exchanger.
  • FIG. 3 is a diagram schematically showing the configuration of the control system of the heat source system 1 shown in FIG.
  • the heat source device control devices 10a, 10b, and 10c which are control devices for the heat source devices 2a, 2b, and 2c, are connected to the system control device 20 via the communication medium 21, and are bidirectional. Communication is possible.
  • the system control device 20 is a control device that controls the entire heat source system.
  • the system control device 20 is a demand limiting function that restricts demand so that the power consumption of the entire system does not exceed the contract power, and the heat source that is activated for the required load of the load device 3. It has a unit control function for controlling the number of units 2a, 2b, and 2c.
  • the system control device 20 and the heat source device control devices 10a, 10b, and 10c are computers, for example, a main storage device such as a CPU (Central Processing Unit), a RAM (Random Access Memory), an auxiliary storage device, and an external device.
  • a communication device that exchanges information by performing communication is provided.
  • the auxiliary storage device is a computer-readable recording medium, such as a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, or a semiconductor memory.
  • Various programs are stored in the auxiliary storage device, and various processes are realized by the CPU reading and executing the program from the auxiliary storage device to the main storage device.
  • FIG. 4 is a functional block diagram showing main elements related to the demand limiting function among the functions provided in the system control apparatus 20.
  • the system control device 20 includes a storage unit 22, a power monitoring unit 23, and a demand limiting unit 24 as main components.
  • the storage unit 22 stores a first power threshold set to a value lower than the contract power, a second power threshold set to a value lower than the first power threshold, and a reference set temperature (for example, 5 ° C.). .
  • the reference set temperature is a set temperature that serves as a reference for the cold water supply temperature supplied from the heat source devices 2a, 2b, and 2c to the load device 3.
  • the power monitoring unit 23 monitors the power consumption of the heat source system (hereinafter referred to as “system power consumption”). For example, the system power consumption is monitored by attaching a multimeter to the main power supply system of the heat source system and inputting the measured value to the system controller 20.
  • the demand restriction unit 24 performs demand restriction so that the system power consumption monitored by the power monitoring unit 23 does not exceed the contract power. For example, when the system power consumption exceeds the first power threshold stored in the storage unit 22, the demand restriction unit 24 performs demand restriction by increasing the set temperature of the water supply temperature. As described above, when the system power consumption exceeds the first power threshold, the set temperature, which is the target value of the water supply temperature, is changed in a direction in which the power consumption decreases. Thereby, the head differential pressure
  • the demand restriction unit 24 lowers the set temperature when the system power consumption becomes less than the second power threshold stored in the storage unit 22. Thereby, the water supply temperature of the cold water supplied to the load apparatus 3 can be brought close to the reference set temperature.
  • demand limitation of the heat source system 1 when the system power consumption exceeds the first power threshold at time t1 in FIG. 5, the demand control unit 24 of the system control device 20 increases the set temperature at a predetermined rate.
  • the changed set temperature is transmitted from the system control device 20 to the heat source device control devices 10a, 10b, and 10c, and the heat source devices 2a, 2b, and 2c are controlled based on the changed set temperature.
  • the system power consumption gradually decreases (see time t1 to time t2 in FIG. 5).
  • the demand control unit 24 of the system control device 20 decreases the set temperature at a predetermined rate.
  • the changed set temperature is transmitted from the system control device 20 to each heat source device control device 2a, 2b, 2c, and each heat source device 2a, 2b, 2c is controlled based on the changed set temperature.
  • the demand control unit 24 of the system control device 20 Increases the set temperature at a predetermined rate.
  • the system power consumption gradually decreases, and when it becomes less than the second power threshold at time t4, the demand control unit 24 of the system control device 20 decreases the set temperature at a predetermined rate.
  • the set temperature reaches the reference set temperature, the reference set temperature is maintained.
  • the set temperature is gradually increased and decreased at a predetermined rate, but the method for increasing and decreasing the set temperature is not limited to this example. For example, it may be gradually raised and lowered step by step.
  • FIG. 5 illustrates the case where the first power threshold and the second power threshold are set to different values, but the first power threshold and the second power threshold are set to the same value. Also good.
  • the system power consumption is monitored, and when the system power consumption exceeds the first power threshold, Increase the set temperature of cold water.
  • voltage of the compressor in each heat source machine can be made small, and the power consumption of a heat source machine can be suppressed.
  • the system power consumption can be reduced, and the system power consumption can be prevented from exceeding the contract power.
  • the power consumption of the heat source unit is effectively reduced. It can be reduced.
  • the load-power consumption characteristic at is a curve indicated by a thin line.
  • the operating point is changed because the head differential pressure of the compressor decreases.
  • the load-power consumption characteristic is a curve indicated by a thick line. That is, by reducing the head differential pressure, it is possible to move the load-power consumption characteristic in a direction in which the power consumption decreases.
  • the load factor when the set temperature is increased from 5 ° C. to 7 ° C., the load factor also changes. That is, when the set temperature (cold water outlet temperature) is changed to 7 ° C. when the load factor is 100% and the cold water outlet temperature is 5 ° C., the load factor decreases from 100% to 60%. Thereby, as shown in FIG. 6, power consumption can be further reduced. In this way, by changing the set temperature of the cold water, both the power consumption reduction effect due to the compressor head differential pressure and the power consumption reduction effect due to the load factor reduction can be obtained, effectively reducing the power consumption. Can be reduced.
  • the demand limiting unit 24 decreases the set temperature when the system power consumption exceeds the first power threshold, and increases the set temperature when the system power consumption is less than the second power threshold.
  • a demand limit stop unit 25 for stopping the demand limit may be provided, and the demand limit may not be performed when the demand limit stop unit 25 is operating.
  • the demand restriction stop and stop cancellation by the demand restriction stop unit 25 may be set based on, for example, input information input from an operator.
  • the system control device 20 performs the demand restriction by increasing the set temperature of the cold water.
  • the load device 3 may have a shortage of heat.
  • the shortage of heat may be resolved by increasing the cold water flow rate.
  • the rotation speed of the chilled water pump is held during a period when the demand is limited, and an increase in power consumption in the chilled water pump is avoided.
  • the demand control unit of the system control device 20 issues a frequency command for the chilled water pump in a period in which the system power consumption exceeds the first power threshold and is less than the second power threshold. Hold.
  • the demand control unit of the system control device 20 issues a frequency command for the chilled water pump in a period in which the system power consumption exceeds the first power threshold and is less than the second power threshold. Hold.
  • the demand control unit 24 may restart the heat source machine that has been forcibly stopped when the system power consumption becomes less than the second power threshold.
  • the demand limiting unit 24 of the system control device 20 performs the demand according to any of the first to third embodiments described above. It differs from the heat source system which concerns on each above-mentioned embodiment by the point which performs control which reduces the motive power of the various electric equipment (illustration omitted) with which the load apparatus 3 is provided while restrict
  • the load device 3 is an air conditioner
  • the amount of air blown indoors is made variable by changing the rotational speed of the fan.
  • the demand control part 24 reduces the frequency of the electric equipment in the load apparatus 3 while changing the preset temperature in a heat source machine. To further reduce system power consumption. Thereby, system power consumption can be reduced rapidly and possibility that system power consumption will exceed contract power can be reduced.
  • the power prediction unit 26 is provided in the system control device. As shown in FIG. 11, the power prediction unit 26 predicts future power consumption from the behavior of power consumption of the heat source system in the past predetermined period T1 from the present time.
  • the demand restriction unit 24 starts demand restriction when the predicted power consumption after a predetermined period T2 from the present time exceeds the first power threshold.
  • the predetermined period T1 is a period that can be arbitrarily determined, and is set to about 30 minutes to 1 hour, for example.
  • the predetermined period T2 is set to a time longer than at least a time delay from when the demand restriction is started until the system power consumption starts to decrease.
  • the future system power consumption is predicted from the behavior of the past system power consumption, and it is determined whether to start demand restriction based on the predicted system power consumption. It is possible to effectively avoid exceeding.
  • a known prediction technique can be adopted, and for example, future power is predicted from the rate of change of system power consumption in a past fixed period.
  • the system controller 20 controls the demand of each heat source unit in an integrated manner.
  • a demand limiting function is provided for each heat source unit controller 10a, 10b, 10c. It is also possible to limit demand on a heat source unit basis.
  • the first power threshold, the second power threshold, and the like as described above are set based on, for example, the limit power of each heat source unit that is apportioned from the contract power of the entire system, and the consumption of each heat source unit.
  • the demand restriction as described above is performed based on the relationship between the power, the first power threshold, and the second power threshold.
  • the power consumption of each heat source device can be detected by attaching a multimeter to the power supply system of each heat source device. Thus, it becomes possible to suppress power consumption also by providing the demand limiting function provided in the system control device 20 in each heat source device control device.
  • power consumption may be monitored in the system control device 20. That is, the system control device 20 monitors the system power consumption, and when the system power consumption exceeds the first power threshold, notifies each heat source device control device of a demand restriction start command for starting demand restriction. It is also good. As described above, the system control device 20 may compare each threshold value with the system power consumption, and may notify the heat source device control device of the comparison result to perform demand restriction. When the demand restriction is performed for each heat source unit, the change rate of the set temperature may be different between the heat source units.
  • the power adjustment network system includes system control devices 20a, 20b, and 20c for a plurality of heat source systems according to any of the above-described embodiments, and a system control device 20a for each heat source system. , 20b, 20c and a central monitoring device 50 connected via a communication medium 51.
  • the central monitoring device 50 acquires the respective system power consumption and the like from the system control devices 20a, 20b, and 20c of each heat source system, determines the first power threshold based on these information and the contract power, and this first The power threshold value is transmitted to each system control device 20.
  • the central monitoring device 50 has a heat source system in which the demand limit is performed or the demand limit is likely to start, and there is a margin before the demand limit is started, in other words, the system power consumption and the first power threshold value.
  • the first power threshold value of the former heat source system is increased and the first power threshold value of the latter heat source system is decreased. In this way, by adjusting the first power threshold value of each heat source system by comparing the system power consumption between the heat source systems, flexible power adjustment can be performed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Le but de la présente invention est de limiter la consommation d'énergie d'un système afin qu'elle soit égale ou inférieure à puissance contractuelle dans le cas où un dispositif de réfrigération est utilisé en tant que source de chaleur. Un dispositif de commande de système (20) est prévu avec : une unité de surveillance de puissance (23) qui contrôle la consommation d'énergie d'un système de source de chaleur ; et une unité de limitation de demande (24). Si la consommation d'énergie du système de source de chaleur dépasse une première valeur seuil de puissance qui est réglée à une valeur inférieure à la puissance contractuelle, l'unité de restriction de demande (24) restreint la demande en augmentant ou en réduisant une température de consigne dans la direction dans laquelle la consommation d'énergie d'une machine de source de chaleur diminue.
PCT/JP2013/052153 2012-03-30 2013-01-31 Système de source de chaleur, dispositif pour le contrôler WO2013145844A1 (fr)

Priority Applications (4)

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DE112013001841.1T DE112013001841T5 (de) 2012-03-30 2013-01-31 Wärmequellensystem, Steuervorrichtung dafür, und Steuerverfahren dafür
KR1020147020839A KR20140108576A (ko) 2012-03-30 2013-01-31 열원 시스템 및 그 제어 장치 및 그 제어 방법
CN201380010891.2A CN104126098A (zh) 2012-03-30 2013-01-31 热源系统及其控制装置以及其控制方法
US14/376,594 US20140374497A1 (en) 2012-03-30 2013-01-31 Heat source system, control device thereof, and control method thereof

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JP2012081013A JP5984456B2 (ja) 2012-03-30 2012-03-30 熱源システムの制御装置、熱源システムの制御方法、熱源システム、電力調整ネットワークシステム、及び熱源機の制御装置
JP2012-081013 2012-03-30

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US20140374497A1 (en) 2014-12-25
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