WO2016046991A1 - 空調冷凍複合設備 - Google Patents
空調冷凍複合設備 Download PDFInfo
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- WO2016046991A1 WO2016046991A1 PCT/JP2014/075747 JP2014075747W WO2016046991A1 WO 2016046991 A1 WO2016046991 A1 WO 2016046991A1 JP 2014075747 W JP2014075747 W JP 2014075747W WO 2016046991 A1 WO2016046991 A1 WO 2016046991A1
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- Prior art keywords
- refrigeration
- air
- conditioning
- peak
- compressor
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- 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
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/60—Energy consumption
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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
- F25B2600/00—Control issues
- F25B2600/01—Timing
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/15—Power, e.g. by voltage or current
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- 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 an air-conditioning and refrigeration complex facility that controls an air conditioner and a refrigeration apparatus in cooperation to control the amount of power used.
- an air-conditioning / freezing complex facility in which an air-conditioning device and a refrigeration device are provided is known, and the air-conditioning / freezing complex facility is installed in a food factory or a supermarket.
- air-conditioning equipment and refrigeration equipment are connected by a transmission line, and the amount of electric load such as the amount of electric power used and the amount of electric current used for each other is detected. It has been proposed to control air-conditioning equipment and refrigeration equipment so as not to exceed target power (contract power) (see, for example, Patent Document 1).
- Patent Document 1 for example, based on the difference between the room temperature and the set temperature in the air conditioner or the difference between the internal temperature and the set temperature in the refrigerator system, the control device operates the operating frequency of one of the compressors. It is disclosed to perform control for lowering. As a result, the peak value of the total power consumption of the air conditioner and the refrigerator system is suppressed while preventing adverse effects on articles in the cooled space and causing discomfort to human beings in the air-conditioned space as much as possible. ing.
- the air-conditioning refrigeration complex facility of Patent Document 1 uses a power consumption amount equal to or greater than the contracted power amount according to the operating condition of the air conditioner depending on the temperature of the air-conditioned space and the operating condition of the refrigeration apparatus depending on the internal temperature. It is controlled not to become.
- the air-conditioning apparatus and the refrigeration apparatus are operated to consume electric power such as a defrosting operation in addition to cooling the air-conditioned space or the inside of the warehouse. For this reason, even if the operation
- the present invention has been made in order to solve the above-described problems, and is an air-conditioning refrigeration that can prevent the amount of contracted electric power from being exceeded even when the operation content that uses a large amount of power instantaneously is performed.
- the purpose is to provide complex facilities.
- An air-conditioning refrigeration complex facility includes an air-conditioning outdoor unit including an air-conditioning compressor, and an air-conditioning apparatus that is connected to the air-conditioning outdoor unit via a pipe and performs air-conditioning of the air-conditioned space.
- a refrigerating apparatus having a refrigerating outdoor unit equipped with a refrigerating compressor, and a refrigerating apparatus connected to the refrigerating outdoor unit via a pipe for cooling an object to be cooled, and the operation of the air conditioner and the refrigerating apparatus.
- An operation control device for controlling the operation monitoring device for acquiring the power consumption of the air conditioning device and the power consumption of the refrigeration device, and the use of the air conditioning device detected by the operation monitoring device.
- the peak prediction unit that predicts the peak time when the sum of the amount of power and the amount of power used by the refrigeration unit is maximum, and the peak power consumption, and the operation frequency of the air conditioning compressor is lowered to the peak time predicted by the peak prediction unit
- An operation control unit that performs any one of the three operation controls of performing the cooling operation of the refrigeration equipment before the peak time and shifting the defrosting operation of the refrigeration equipment before and after the peak time. It is a thing.
- the operation of lowering the operating frequency of the air conditioning compressor is performed at the peak time, the cooling operation of the refrigeration equipment is performed before the peak time, and the defrosting operation of the refrigeration equipment is performed. Executing any one of the three operation controls that are shifted before and after the peak time suppresses the overlap of operation time of the operation contents that use a lot of power instantaneously, and exceeds the contract power amount Can be prevented.
- FIG. 1 is a schematic diagram showing an air-conditioning refrigeration complex facility according to an embodiment of the present invention.
- the air-conditioning refrigeration complex facility 1 in FIG. 1 is a system laid in a facility where an air conditioner 10 and a refrigeration apparatus 20 such as a food factory are installed, and the air conditioner 10, the refrigeration apparatus 20, and an operation control apparatus. 30.
- the air-conditioning refrigeration complex facility 1 exemplifies a case where one air conditioning apparatus 10 and one refrigeration apparatus 20 are included, but two or more air conditioning apparatuses 10 or two or more refrigerations are illustrated.
- the apparatus 20 may be included.
- the air conditioner 10 performs air conditioning in an air-conditioned space, and includes an air conditioning outdoor unit 11 and a plurality of indoor units 12A to 12D.
- the air conditioner outdoor unit 11 and the indoor units 12A to 12D constitute a refrigerant circuit connected by a refrigerant pipe 13, and the refrigerant circulates through the refrigerant circuit to heat or cool the air in the air-conditioned space for air conditioning. I do.
- the air conditioning apparatus 10 of FIG. 1 has illustrated about the case where it has one outdoor unit 11 for air conditioning and four indoor units 12A-12D, the number is not limited, for example, two or more units You may have the outdoor unit 11 for an air conditioning, and the thing provided with the 1 or more indoor unit 12A should just be.
- the refrigeration apparatus 20 is a low-temperature facility for cooling or freezing an object to be cooled to a temperature lower than the surroundings, and includes a freezing outdoor unit 21 and freezing devices 22A to 22D.
- the refrigeration outdoor unit 21 and the refrigeration equipments 22A to 22D are connected by a refrigerant pipe 23 to constitute a refrigerant circuit in which the refrigerant circulates.
- Each refrigeration equipment 22A to 22D cools the object to be cooled such as food by cooling the air in the space to be cooled.
- the refrigeration apparatus 20 shown in FIG. 1 is illustrated as having a single refrigeration outdoor unit 21 and four refrigeration equipments 22A to 22D, but the number of units is not limited. For example, two or more refrigeration units 20
- the outdoor unit 21 may be provided, and any unit having one or more refrigeration equipments 22A may be used.
- the operation control device 30 controls the operation of the air conditioning outdoor unit 11, the plurality of indoor units 12A to 12D, the freezing outdoor unit 21, and the plurality of refrigeration equipments 22A to 22D. At this time, the operation control device 30 controls the operation state such as increasing / decreasing or stopping the operation frequency of the air conditioning compressor 11a of the air conditioning outdoor unit 11 and the refrigeration compressor 21a of the refrigeration outdoor unit 21. Further, the operation control device 30 controls the operation of the defrosting operation of each of the refrigeration equipments 22A to 22D for the purpose of defrosting the refrigeration equipments 22A to 22D.
- the defrosting operation is generally an operation for melting frost by heating with a heater or the like.
- the amount of power used by the air conditioner 10 and the refrigeration device 20 is measured by the watt-hour meter 2, and the operation control device 30 acquires the amount of power used by the entire air-conditioning refrigeration complex facility 1 measured by the watt-hour meter 2.
- the watt-hour meter 2 has a function of individually measuring the amount of power consumed by each of the freezing outdoor unit 21, the freezing devices 22A to 22D, the air conditioning outdoor unit 11 and the indoor units 12A to 12D. Therefore, the operation control device 30 may acquire the power consumption for each component device.
- FIG. 2 is a graph showing the time transition of the amount of power used in the facility where the air conditioning apparatus and the refrigeration apparatus are laid.
- FIG. 2 shows time transitions of the power consumption AEC of the air conditioner 10, the power consumption CEC of the refrigeration apparatus 20, and the total power usage TEC of the power consumption AEC and the power consumption CEC. .
- facilities such as those described above have contracts with electric power companies for power consumption, and the basic charge is calculated based on the maximum power demand. Therefore, it is necessary to suppress the maximum power demand.
- the contract power is 400 kWh in terms of electric energy
- the air conditioner 10 and the refrigeration apparatus 20 simultaneously reach the peak of the electric energy used at 10:00 to 11:00 and 12:00 to 16:00.
- the amount of power used is added to the amount of power and the contracted power amount exceeds 400 kWh.
- FIG. 3 is a block diagram showing an example of an operation control apparatus in the air-conditioning / refrigeration complex facility of FIG.
- the operation control device 30 includes an operation monitoring unit 31, a peak prediction unit 32, and an operation control unit 33.
- the operation monitoring unit 31 monitors the operation status of the air conditioning apparatus 10 and the refrigeration apparatus 20, and stores the monitored monitoring data in the storage unit 31a. Further, the operation monitoring unit 31 has a function of acquiring the power consumption of the air conditioner 10 and the power consumption of the refrigeration apparatus 20. Specifically, the operation monitoring unit 31 acquires the power consumption of the air conditioning apparatus 10 and the refrigeration apparatus 20 measured by the watt-hour meter 2 as shown in FIG.
- the operation monitoring unit 31 may acquire the amount of power used from the operating states of the air conditioner 10 and the refrigeration apparatus 20. For example, the operation time of the outdoor unit 11 for air conditioning, the indoor units 12A to 12D, the outdoor unit 21 for refrigeration, and the refrigeration equipments 22A to 22D, the difference between room temperature / internal temperature and set temperature, compressor frequency, and defrosting operation information ( From the information on the power consumption of the defrosting operation set in advance, the execution time of the defrosting operation, etc.), the refrigeration outdoor unit 21, the refrigeration equipments 22A to 22D, the air conditioning outdoor unit 11 and the indoor units 12A to 12D Calculate the amount of power consumed.
- the operation monitoring unit 31 monitors the operation status of each device of the air conditioning apparatus 10 and the refrigeration apparatus 20, and stores the monitoring status in the storage unit 31a.
- FIG. 4 is a graph showing the time transition of the operating frequency of the air conditioning compressor of FIG. As shown in FIG. 4, the operating frequency f10 of the air conditioning compressor 11a varies according to the air conditioning load of the air conditioned space.
- FIG. 5 is a graph showing the time transition of the operating frequency of the compressor in the outdoor unit for refrigeration and air conditioning shown in FIG. As shown in FIG. 5, the operating frequency f20 of the refrigeration compressor 21a varies according to the load in the warehouse.
- FIG. 6 is a graph showing the time transition of the defrosting operation of the refrigeration apparatus of FIG.
- the refrigeration apparatus 20 generally has frost around the fan. If frost adheres, the cooling efficiency decreases, so it is necessary to defrost regularly.
- the defrosting operation is performed using a heat coil, and heating by a heater or the like is periodically performed only for a period DD to melt the frost, and in the operation that consumes a lot of electric power in the heater or the like. is there.
- the operating frequency of the compressor in the outdoor unit 11 for air conditioning is dominant in the power consumption of the air conditioner 10. Further, the power consumption of the refrigeration apparatus 20 is dominated by the operating frequency of the compressor of the refrigeration outdoor unit 21 and the defrosting operation. Therefore, the operation monitoring unit 31 is a system based on the operating frequency of the compressor in the outdoor unit 11 for air conditioning, the operating frequency of the compressor of the outdoor unit 21 in the refrigeration apparatus 20, and the state of the defrosting operation of the refrigeration apparatus 20. Calculate and obtain the total power consumption for each hour.
- the peak prediction unit 32 predicts a peak time when the sum of the power consumption of the air conditioning apparatus 10 and the power consumption of the refrigeration apparatus 20 acquired by the operation monitoring unit 31 is equal to or greater than the set power value Pref. At this time, the peak prediction unit 32 may use the power consumption measured by the watt hour meter 2 or may use the power consumption calculated by the operation monitoring unit 31.
- the set power value is a value smaller than the contract power, for example, and may be set arbitrarily by the user, or may be set to a value obtained by subtracting a predetermined ratio from the contract power. For example, when the contract power is 500 kWh, the set power value is set to 400 kWh, which is 90% of the contract power. Then, the peak predicting unit 32 predicts, as a peak time, a time during which the power consumption of the entire system including the power consumption of the air conditioner 10 and the refrigeration apparatus 20 is greater than the set power value Pref and smaller than the contract power. To do.
- the peak prediction unit 32 predicts the peak time to reach the peak power consumption of the entire system on the previous day. Specifically, the peak prediction unit 32 adds the power consumption of the air conditioning apparatus 10 and the refrigeration apparatus 20 of the previous day, and the time during which the power consumption of the entire system is larger than the set power value Pref and smaller than the contract power. Is estimated as the peak time.
- FIG. 7 is a graph showing the operation frequency f10 of the air conditioning compressor, the defrosting operation period DD of the refrigeration apparatus, and the operation frequency f20 of the refrigeration compressor. In particular, in the operation state as shown in FIG. 7, the peak prediction unit 32 predicts the peak time PD in which the period in which the three operation controls overlap is larger than the set power value Pref.
- the peak prediction unit 32 determines that the set power value (for example, 400 kWh) is 10 o'clock to 11 o'clock and 12 o'clock to 16 o'clock Is predicted as the peak time of the day.
- the set power value for example, 400 kWh
- the peak prediction part 32 has illustrated about the structure which estimates the peak time of the day using the electric power consumption or driving
- the peak time may be predicted using an average value for each hour or an average value for each hour.
- the operation control unit 33 in FIG. 3 performs the defrosting operation of the refrigeration apparatus 20, the cooling operation of the refrigeration apparatus 20, or the operation of reducing the operation frequency of the air conditioning compressor 11a at the peak time predicted by the peak prediction unit 32.
- One of the three operation controls is executed.
- the operation control unit 33 controls the air conditioner 10 and the refrigeration apparatus 20 so that the total power consumption of the air conditioner 10 and the refrigeration apparatus 20 becomes smaller than the set power value Pref, and the entire system is used. Ensure that the amount of power does not exceed the contract power.
- the defrosting operation of the refrigeration apparatus 20, the cooling operation of the refrigeration apparatus 20, or the operation of reducing the operation frequency of the air conditioning compressor 11a will be described in detail.
- the cooling operation cools the cooling space to a temperature lower than the normal target temperature before the peak time so that the temperature of the cooling space is kept below the upper limit temperature without cooling during the peak time.
- FIG. 8 is a graph showing the relationship between the time when the cooling space where the refrigeration equipment of FIG. 1 cools and the temperature rise are not cooled.
- T0 indicates the target temperature during the cooling operation
- T1 indicates the target temperature of the cooling space during the normal operation
- T2 indicates the upper limit temperature allowed to ensure the quality of the cooling object.
- FIG. 9 is a graph showing how the cooling operation is performed before the peak time by the operation control unit of FIG.
- the operation control unit 33 controls the operation frequency f20 of the refrigeration compressor 21a in the cooling period CP before the predicted peak time, and the cooling space in the refrigeration equipments 22A to 22D is controlled.
- the cooling space is cooled until the temperature reaches the target temperature T0 during the cooling operation.
- the operation control unit 33 controls the refrigeration apparatus 20 so that the cooling operation is stopped when the target temperature T0 is reached.
- the operation control part 33 will control the freezing apparatus 20 so that normal cooling operation may be restarted, when upper limit temperature T2 is reached after progress of peak time.
- the target temperature T0 during the cooling operation may be set so that the operation time of the defrosting operation becomes longer than the arrival time t. For example, when the operating time of the defrosting operation is 10 minutes, the target temperature T0 during the cooling operation is set so that the arrival time t> 10 minutes. Then, by performing the cooling operation before the defrosting operation, it is possible to prevent the cooling operation from being performed during the defrosting operation.
- FIG. 10 is a graph showing a state in which the defrosting operation period DD is shifted in the operation control unit of FIG.
- the operation control unit 33 determines that the period DD of the defrosting operation overlaps the peak time
- the operation control unit 33 shifts the period DD in which the defrosting operation is performed before and after the peak time, and defrosts at the peak time. Control is performed so that the operating periods DD do not overlap.
- the operation control unit 33 derives the time to shift so that the shifted destination does not overlap with the peak of the operating frequency of the air conditioning compressor 11a and the refrigeration compressor 21a so that the defrosting operation is performed. Control.
- the operation control unit 33 performs control so that the cooling operation is performed before the peak time and the defrosting operation is performed after the peak time.
- the operation control unit 33 performs control so that the cooling operation is performed before the peak time and the defrosting operation is performed after the peak time.
- FIG. 11 is a graph showing how the operating frequency of the air conditioning compressor is limited to the peak time.
- the operation control unit 33 performs the operation frequency limit (capacity saving) on the air conditioning compressor 11 a at the peak time.
- the operation control unit 33 performs control so that the operation is performed at a predetermined rate (for example, 30%) lower than the operation frequency of the air conditioning compressor 11a on the previous day. Thereby, the power consumption of the whole system is suppressed.
- FIG. 12 is a graph showing the power consumption when one or more of the cooling operation of the refrigeration equipment, the time shift control of the defrosting operation, and the capacity saving operation of the air conditioner are executed.
- the operation control unit 33 in FIG. 3 performs the defrosting operation of the refrigeration apparatus 20, the cooling operation of the refrigeration apparatus 20, or the operation of reducing the operation frequency of the air conditioning compressor 11a at the peak time predicted by the peak prediction unit 32.
- One of the three operation controls is executed. Then, as shown in FIG. 12, the peak value of the power consumption can be suppressed at the peak time of the power consumption, even at the peak time.
- FIG. 13 is a graph showing the amount of power used when one or more of the cooling operation of the refrigeration equipment, the time shift control of the defrosting operation, and the capacity saving operation of the air conditioner are executed over a plurality of days. It is.
- the operation control unit 33 illustrates the case where any one of the three operation controls described above is executed, but executes two or all three operation controls. You may do it. Moreover, it is desirable that the operation control unit 33 performs the control in the priority order of the defrosting operation and the cooling operation that lowers the operation frequency of the air conditioning compressor 11a among the three operation controls described above. Further, the operation control unit 33 is not limited to the case where priority is given, and the user arbitrarily sets whether to perform the cooling operation, shift the defrosting operation, or lower the operation frequency of the air conditioning compressor 11a. May be.
- the operation control unit 33 increases the operation frequency of the compressor of the air conditioner outdoor unit 11 when the frequency of the air conditioner compressor 11a is lowered at the peak time and the room temperature becomes higher than the room temperature set temperature. Then, the defrosting operation of the refrigeration apparatus 20 may be controlled to be performed after the peak time. As a result, it is possible to suppress an instantaneous increase in power consumption during peak hours while minimizing the discomfort of people in the air-conditioned space.
- the operation control unit 33 executes the defrosting operation before the cooling operation, and performs the cooling operation after performing the defrosting. You may make it perform. Thereby, since cooling of a cooling space is performed after defrosting is performed, a cooling operation can be performed efficiently.
- the refrigeration apparatus 20 includes an internal temperature detection unit that detects the internal temperature for cooling the object to be cooled, and the operation control unit 33 reduces the frequency of the air conditioning compressor 11a during the peak time.
- the frequency of the compressor of the outdoor unit for air conditioning 11 is further lowered and the frequency of the compressor of the outdoor unit for freezing 21 is increased. You may make it control so. Thereby, it is possible to prevent deterioration of the quality of the objects to be cooled stored in the refrigerators 22A to 22D.
- FIG. 14 is a flowchart showing an operation example of the air-conditioning / refrigeration combined facility of FIG. 1, and an operation example of the air-conditioning / refrigeration combined facility 1 will be described with reference to FIGS.
- the operation monitoring unit 31 and the peak prediction unit 32 analyze the past operation state (step ST2), and the peak power consumption of the entire system is determined. Time is predicted (step ST3).
- step ST4a any one of cooling control (step ST4a), defrosting operation time shift (step ST4b), and capacity saving of the air conditioner 10 (step ST4c) based on the peak time. Perform one or more operational controls. Then, it is possible to prevent the power consumption of the entire system from exceeding the contract power.
- the operation monitoring unit 31 stores the amount of power used on that day in the storage unit 31a and uses it as data for performing operation control on the next day (step ST5). If the amount of power used is less than or equal to the set power value Pref on the next day, the operation monitoring unit 31 determines that the operation control state is optimal, and continues the control content of the previous day (step ST6). On the other hand, if the power consumption is larger than the set power value Pref on the next day, the operation state is analyzed again (step ST2) and the peak time is predicted (steps ST2 and ST3), and any one of the three operation controls is performed. (Steps ST4a to ST4c).
- the operation control device 30 predicts the peak power based on the past operation states of the air conditioner 10 and the refrigeration device 20, and performs the operation of reducing the operation frequency of the air conditioning compressor 11a at the peak time. By performing one or more of: performing the cooling operation of the refrigeration equipment 22A to 22D before the peak time, and performing the defrosting operation of the refrigeration equipment 22A to 22D before and after the peak time. In addition, it is possible to suppress overlapping of operation times of operation contents that consume a lot of electric power instantaneously, and the user can comply with contract electric power.
- the operation control unit 33 performs the operation of lowering the operating frequency of the air conditioning compressor 11a, the defrosting operation of the refrigeration equipments 22A to 22D being shifted before and after the peak time, and the refrigeration equipments 22A to 22D before the peak time.
- the priority order of performing the cooling operation it is possible to suppress the discomfort of the air-conditioned space as much as possible while suppressing the deterioration of the quality of the objects to be cooled stored in the refrigeration equipment 22A to 22D, and to reduce the power consumption Can be achieved.
- the operation control unit 33 lowers the operating frequency of the air conditioning compressor 11a at the peak time and the room temperature of the air-conditioned space becomes higher than the set temperature, the operating frequency of the air conditioning compressor 11a is increased.
- the defrosting operation of the refrigeration equipments 22A to 22D is performed after the peak time, it is possible to reduce the amount of power used while minimizing discomfort in the air-conditioned space.
- the operation control unit 33 performs the defrosting operation after the peak time and controls the cooling operation to be performed before the peak time, it is possible to reliably reduce the quality of the object to be cooled within the peak time. While suppressing, it is possible to reduce the amount of power used.
- the air conditioning compressor 11a when the operation control unit 33 reduces the frequency of the air conditioning compressor 11a during the peak time, and the internal temperature of the refrigeration equipments 22A to 22D becomes equal to or higher than the set internal temperature, the air conditioning compressor When the operation frequency of 11a is further lowered and the operation frequency of the refrigeration compressor 21a is controlled to be increased, it is possible to suppress the amount of power used while reliably suppressing the deterioration of the quality of the object to be cooled.
- the embodiment of the present invention is not limited to the above embodiment.
- the peak prediction unit 32 may predict not only the peak time but also the peak power that is the power used at the peak time.
- the operation control unit 33 may determine the number of operation controls to be executed among the three operation controls based on the predicted peak power. For example, when a plurality of set power values are set and the peak power is larger than the set maximum set power value, all three operation controls are executed, and when the set power value is larger than the second largest set power value Two operation controls may be executed, and one operation control may be executed when the operation value is larger than the lowest set power value. Thereby, the overlap of the operation time of the operation content with much electric power used instantaneously can be suppressed reliably.
- the operation control unit 33 shifts the time of the defrosting operation for each of the plurality of refrigeration equipments 22A to 22D. You may make it control to. Similarly, the operation control unit 33 may control the chilling operation so that the defrosting operation time is shifted for each of the plurality of refrigeration devices 22A to 22D.
- Air-conditioning refrigeration complex equipment 2 watt-hour meter, 10 air conditioner, 11 air-conditioning outdoor unit, 11a air-conditioning compressor, 12A-12D indoor unit, 13 refrigerant piping, 20 freezing device, 21 freezing outdoor unit, 21a freezing Compressor, 22A-22D refrigeration equipment, 23 refrigerant piping, 30 operation control unit, 31 operation monitoring unit, 31a storage unit, 32 peak prediction unit, 33 operation control unit, 40 operation control unit, AEC power consumption, CEC use Electricity amount, CP cooling period, DD operation period, f10 air conditioning compressor operating frequency, f20 refrigeration compressor operating frequency, PD peak time, Pref set power value, t arrival time, T0 target temperature, T1 set temperature, T2 upper limit temperature, TEC power consumption.
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Abstract
Description
以下、本発明の空調冷凍複合設備の実施の形態について、図面を用いて詳細に説明する。図1は本発明の実施の形態に係る空調冷凍複合設備を示す模式図である。図1の空調冷凍複合設備1は、例えば食品工場等の空気調和装置10と冷凍装置20とが併設される施設へ敷設されるシステムであって、空気調和装置10、冷凍装置20、運転制御装置30を有している。図1において、空調冷凍複合設備1は、1台の空気調和装置10と1台の冷凍装置20とを有する場合について例示しているが、2台以上の空気調和装置10又は2台以上の冷凍装置20を有していてもよい。
Claims (8)
- 空調用圧縮機を備えた空調用室外機と、前記空調用室外機に配管を介して接続され空調空間の空気調和を行う室内機とを有する空気調和装置と、
冷凍用圧縮機を備えた冷凍用室外機と、前記冷凍用室外機に配管を介して接続され被冷却物の冷却を行う冷凍機器とを有する冷凍装置と、
前記空気調和装置及び前記冷凍装置の動作を制御する運転制御装置と
を有し、
前記運転制御装置は、
前記空気調和装置の使用電力量と前記冷凍装置の使用電力量とを取得する運転監視部と、
前記運転監視部において検出された前記空気調和装置の使用電力量と前記冷凍装置の使用電力量との合計が最大になるピーク時間及びピーク電力使用量を予測するピーク予測部と、
前記ピーク予測部において予測された前記ピーク時間に前記空調用圧縮機の運転周波数を下げる運転を行うこと、前記ピーク時間の前に前記冷凍機器の冷やし込み運転を行うこと、前記冷凍機器の霜取運転を前記ピーク時間の前後にずらして行うことの3つの運転制御のうちいずれかを実行する動作制御部と
を備えた空調冷凍複合設備。 - 前記動作制御部は、前記空調用圧縮機の運転周波数を下げる運転、前記冷凍機器の霜取運転を前記ピーク時間の前後にずらして行うこと、前記ピーク時間の前に前記冷凍機器の冷やし込み運転を行うことの優先順位で制御するものである請求項1に記載の空調冷凍複合設備。
- 前記動作制御部は、前記ピーク時間に前記空調用圧縮機の運転周波数を下げた場合であって空調空間の室温が設定温度より高くなったとき、前記空調用圧縮機の運転周波数を上げて、前記冷凍機器の霜取運転を前記ピーク時間の後に行うように制御するものである請求項1又は2に記載の空調冷凍複合設備。
- 前記動作制御部は、前記霜取運転を前記ピーク時間よりも後に実行し、前記冷やし込み運転を前記ピーク時間の前に実行するように制御するものである請求項1~3のいずれか1項に記載の空調冷凍複合設備。
- 前記動作制御部は、前記ピーク時間に前記空調用圧縮機の周波数を下げているときに、前記冷凍機器の庫内温度が設定庫内温度以上になったとき、前記空調用圧縮機の運転周波数をさらに下げて前記冷凍用圧縮機の運転周波数を上げるように制御するものである請求項1~4のいずれか1項に記載の空調冷凍複合設備。
- 前記ピーク予測部は、前日の前記空気調和装置の使用電力量と前記冷凍装置の使用電力量とから当日の前記ピーク時間を予測するものである請求項1~5のいずれか1項に記載の空調冷凍複合設備。
- 前記空気調和装置及び前記冷凍装置の使用電力量を計測する電力量計をさらに備え、
前記運転監視部は、前記電力量計において計測された運転状態から前記空気調和装置及び前記冷凍装置の使用電力量を取得するものである請求項1~6のいずれか1項に記載の空調冷凍複合設備。 - 前記運転監視部は、前記空気調和装置及び前記冷凍装置の運転状態から使用電力量を取得するものである請求項1~7のいずれか1項に記載の空調冷凍複合設備。
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JPWO2021240615A1 (ja) * | 2020-05-25 | 2021-12-02 |
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- 2014-09-26 WO PCT/JP2014/075747 patent/WO2016046991A1/ja active Application Filing
- 2014-09-26 JP JP2016549890A patent/JPWO2016046991A1/ja active Pending
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CN111503723A (zh) * | 2020-02-14 | 2020-08-07 | 青岛海信日立空调系统有限公司 | 一种空调设备 |
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JP7309063B2 (ja) | 2020-05-25 | 2023-07-14 | 三菱電機株式会社 | 冷凍サイクル装置 |
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