WO2013051642A1 - Système utilisant l'énergie solaire - Google Patents

Système utilisant l'énergie solaire Download PDF

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Publication number
WO2013051642A1
WO2013051642A1 PCT/JP2012/075763 JP2012075763W WO2013051642A1 WO 2013051642 A1 WO2013051642 A1 WO 2013051642A1 JP 2012075763 W JP2012075763 W JP 2012075763W WO 2013051642 A1 WO2013051642 A1 WO 2013051642A1
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WIPO (PCT)
Prior art keywords
heat
heat exchanger
flow rate
solar energy
heat medium
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PCT/JP2012/075763
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English (en)
Japanese (ja)
Inventor
菊池　宏成
隆成 水島
Original Assignee
株式会社日立プラントテクノロジー
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Filing date
Publication date
Application filed by 株式会社日立プラントテクノロジー filed Critical 株式会社日立プラントテクノロジー
Priority to CN201280048513.9A priority Critical patent/CN103890499A/zh
Priority to IN2534CHN2014 priority patent/IN2014CN02534A/en
Priority to GBGB1314899.4D priority patent/GB201314899D0/en
Priority to SG11201401315TA priority patent/SG11201401315TA/en
Publication of WO2013051642A1 publication Critical patent/WO2013051642A1/fr

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    • 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
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1078—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump and solar energy
    • 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
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0221—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with solar energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40—Thermal components
    • H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S2020/10—Solar modules layout; Modular arrangements
    • F24S2020/17—Arrangements of solar thermal modules combined with solar PV modules
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/60—Thermal-PV hybrids

Definitions

  • the present invention relates to a solar energy utilization system.
  • Patent Document 1 discloses a technique of utilizing sunlight by a water collector and a liquid heat medium conduit connected to a solar cell.
  • Patent Document 2 discloses a technique in which a solar cell is mounted on the surface of a direct expansion heat exchanger of a heat pump and sunlight is used as energy for heating / hot water heating.
  • the technique disclosed in the patent document has the following problems. Driving power is required to drive each means constituting the system. This power becomes large depending on the operating conditions of the system. For this reason, the power consumption increases depending on the operating conditions, and more power than the amount of power generated by the solar cell may be consumed. As a result, solar energy utilization efficiency may be reduced. Also, even if no more power than the generated power is consumed, the disclosed system is still insufficient in energy efficiency.
  • This invention is made in view of the said subject, The objective is to provide the solar energy utilization system which improved the utilization efficiency of solar energy rather than before.
  • the present inventors have at least a heat exchanger and a heat pump or another heat exchanger and a circulation pump, and can solve the above problems by controlling the circulation amount of the heat medium.
  • the headline and the present invention were completed.
  • FIG. 3 is a diagram showing the amount of heat recovered and the amount of power generated by the solar cell 1 with respect to the heat medium temperature supplied to the heat exchanger 2.
  • 3 is a flowchart showing control in the solar energy utilization system 100. It is a figure which shows the structure of the solar energy utilization system which concerns on 2nd Embodiment. It is a figure which shows the structure of the solar energy utilization system which concerns on 3rd Embodiment.
  • a solar energy utilization system 100 includes a solar cell 1, a heat exchanger 2 provided in close contact (close proximity) with the back surface of the solar cell (opposite side of the solar light irradiation surface), and a heat pump. 3 and a pump 4 controlled by an inverter (INV). And the heat exchanger 2 and the heat pump 3 are connected via piping, and a heat medium circulates between the heat exchanger 2 and the heat pump 3 through this piping.
  • the arrow in FIG. 1 has shown the flow direction of a refrigerant
  • the solar energy utilization system 100 includes an arithmetic control unit 5 that controls the circulation of the heat medium.
  • the calculation control unit 5 calculates the power consumption in the energy utilization system 100 and the power generation amount of the solar cell 1.
  • the arithmetic control part 5 controls the circulation flow rate of a heat medium by controlling the pump 4 based on this calculation result.
  • the solar energy utilization system 100 includes a current sensor 61 that measures the current of the solar cell 1, a voltage sensor 62 that measures the voltage, a temperature sensor 71 that measures the temperature of the heat medium discharged from the heat pump 3, and heat exchange.
  • a temperature sensor 72 for measuring the temperature of the heat medium discharged from the heat exchanger 2 a temperature sensor 79 for measuring the external temperature (outside air temperature), and a flow sensor for measuring the flow rate of the heat medium discharged from the heat exchanger 2. 91 is provided.
  • the solar energy utilization system 100 includes a system for supplying water heated by the heat pump 3 and storing the heated water.
  • the solar energy utilization system 100 includes an inverter-controlled pump 33, a flow rate sensor 93 that measures the flow rate of water supplied to the heat pump 3, and a temperature sensor 73 that measures the temperature of water supplied to the heat pump 3.
  • a temperature sensor 74 for measuring the temperature of water discharged from the heat pump 3 (ie, heated water) and a hot water supply tank 13 for storing the water discharged from the heat pump 3 are provided.
  • the solar cell 1 converts the energy of sunlight into electric power and supplies it as electric power to the outside.
  • the obtained electric power is supplied to an external load (not shown).
  • the obtained electric power is also used as electric power for driving each means (for example, the heat pump 3, the pump 4, etc.) constituting the solar energy utilization system 100.
  • the heat exchanger 2 cools the solar cell 1. Specifically, by passing a heat medium having a low temperature through the heat exchanger 1, the heat of the solar cell 1 is transmitted to the heat medium, and the temperature of the solar cell 1 is lowered. Note that the heat medium discharged from the heat exchanger 2 (heat medium to which heat from the solar cell 1 is transmitted) is supplied to a heat pump 3 to be described later.
  • the heat medium may be water (preferably providing a facility that does not freeze even at low temperatures), an antifreeze solution, or the like. Further, a gas such as carbon dioxide may be used.
  • the heat pump 3 is supplied with the heat medium discharged from the heat exchanger 2.
  • the heat pump 3 includes an evaporator 3a, a compressor 3b, a condenser 3c, and an expansion valve 3d.
  • the heat medium is supplied to the evaporator 3a.
  • the refrigerant flows through the heat pump 3 in the direction shown in FIG.
  • the water supplied to the heat pump 3 is supplied to the condenser 3c.
  • the refrigerant is compressed by the compressor 3b after receiving heat from the heating medium by the evaporator 3a. Thereby, a refrigerant
  • coolant will be in a high temperature / high pressure state.
  • the high-temperature and high-pressure refrigerant is cooled by the condenser 3c. That is, the heat of the high-temperature and high-pressure refrigerant is transmitted to the water supplied to the heat pump 3 (condenser 3c). Thereby, heated water (hot water) is obtained.
  • the obtained hot water is stored in the hot water supply tank 13.
  • the cooled refrigerant is expanded by the expansion valve 3d to be in a low temperature and low pressure state. Thereafter, the refrigerant is supplied again to the evaporator 3a.
  • the heat pump 3 in order to store hot water having a temperature suitable for use, the heat pump 3 is controlled so that the temperature measured by the temperature sensor 74 is 45 ° C.
  • the pump 4 circulates a heat medium between the heat exchanger 2 and the heat pump 3. Further, the circulation amount of the heat medium is changed by the pump 4.
  • the pump 4 is inverter-controlled and operates at a high rotational speed when the flow rate of the heat medium is large. On the other hand, when the flow rate of the heat medium is small, operation is performed at a low rotational speed. By using such an inverter-controlled pump, the rotation speed can be changed according to the flow rate. Thereby, when the heat medium flow rate is small, the rotational speed of the pump 4 can be suppressed, and the power consumption can be reduced.
  • the arithmetic control unit 5 is connected to each sensor (voltage sensor, voltage sensor, temperature sensor, flow rate sensor, etc.), each pump, and each means (heat exchanger 2 etc.) via an electric signal line (not shown). .
  • the calculation control unit 5 receives information (electrical signals) from each sensor, each pump, and the like, calculates (calculates), and controls the operation of each pump and each means based on the result of the calculation.
  • the calculation control unit 5 is one form as a flow rate control unit that controls the pump 4 to change the circulation amount of the heat medium. That is, the calculation control unit 5 is connected to each sensor, each pump, and each means, and communicates with the communication unit 5a that exchanges electrical signals, and an optimum output calculation unit that determines the amount of heat medium that flows through the heat exchanger 2. 5b, a simulation unit 5c that simulates (calculates) the amount of power generated by the solar cell 1 and the amount of power consumed by the solar energy utilization system 100, and a control unit 5d that controls the rotational speed (ie, inverter frequency) of each pump. It is equipped with. Specific control by the arithmetic control unit 5 will be described later.
  • the arithmetic control unit 5 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), and the like.
  • a CPU Central Processing Unit
  • ROM Read Only Memory
  • RAM Random Access Memory
  • HDD Hard Disk Drive
  • any devices and means can be used as the temperature sensors 71, 72, 73, 74, 79, the flow sensors 91, 93, the current sensor 61, the voltage sensor 62, and the pumps 4, 33.
  • the arithmetic control unit 5 controls the flow rate of the heat medium supplied to the heat exchanger 2 so that the power consumption in the solar energy utilization system 100 is as small as possible and the power generation amount of the solar cell 1 is as large as possible. That is, the supply flow rate of the heat medium to the heat exchanger 2 is controlled so that the difference between the power generation amount and the power consumption in the solar energy utilization system 100 becomes the largest. This will be specifically described below.
  • position information such as the latitude and longitude of the place where the solar cell 1 is installed is input to the optimum output calculation unit 5b of the calculation control unit 5 (step S101).
  • position information such as the latitude and longitude of the place where the solar cell 1 is installed is input to the optimum output calculation unit 5b of the calculation control unit 5 (step S101).
  • an electronic file in which position information is recorded is created using an input device such as a keyboard (not shown), and the value recorded in the electronic file is input. Further, the simulation start time is input.
  • the optimal output calculating part 5b acquires a measured value from the current sensor 61, the voltage sensor 62, each temperature sensor, and each flow sensor.
  • the optimum output calculation unit 5b calculates the amount of power generated by the solar cell 1 from the measured current value and voltage value of the solar cell 1 (step S102).
  • the calculated power generation amount is an actual power generation amount.
  • the solar cell 1 is connected to a secondary battery (not shown). That is, the power generated by the solar cell 1 is charged in the secondary battery. Thereby, a current flows through the solar cell 1.
  • the optimum output calculation unit 5b calculates the temperature of the surface of the solar cell 1 based on the calculated power generation amount (step S103).
  • the surface temperature is calculated based on a predetermined formula (heat balance, heat transfer characteristics) regarding the power generation amount of the solar cell 1 and the temperature of the heat medium supplied to and discharged from the heat exchanger 2.
  • the optimum output calculation unit 5b uses the temperature sensors 71 and 72 and the flow rate sensor 91 to calculate the amount of heat received by the heat medium in the heat exchanger 2 (that is, the amount of heat exchange between the solar cell 1 and the heat exchanger 2). calculate.
  • the temperature sensor 71 measures the temperature of the heat medium at the inlet of the heat exchanger 2 (that is, the temperature of the heat medium discharged from the heat pump 3 (specifically, the evaporator 3a)).
  • the temperature sensor 72 measures the temperature of the heat medium at the outlet of the heat exchanger 2 (that is, the temperature of the heat medium supplied to the heat pump 3).
  • the surface temperature of the solar cell 1 is calculated in consideration of the amount of heat obtained by calculation, the outside air temperature measured by the temperature sensor 79, the heat transfer characteristics of the heat exchanger 2, the heat balance in the system, and the like.
  • the amount of heat released from the solar cell 1 to the outside air that is, outside the system
  • the amount of heat released from the heat exchanger 2 to the outside air and the like are also calculated.
  • the optimum output calculation unit 5b calculates the solar trajectory based on the latitude, longitude, time, etc., input in step S101, and calculates the solar altitude and azimuth.
  • the solar radiation amount to the solar cell 1 is calculated by the electric power generation amount calculated by step S102, and the surface temperature calculated by step S103 (step S104). This amount of solar radiation is calculated based on a predetermined formula that reflects the temperature-efficiency characteristics of the solar cell 1.
  • the optimum output calculation unit 5b sets the supply amount of the heat medium supplied to the heat exchanger 2 (step S105). That is, the flow value by the pump 4 is set.
  • the initial flow rate in this embodiment is the maximum flow rate that can be changed by the pump 4.
  • the simulation unit 5c performs the following control (step S106 to step S111).
  • the temperature of the heat medium is input to the simulation unit 5c.
  • the same method as the input method in step S101 is used.
  • the outside air temperature measured by the temperature sensor 79 is set as the heat medium temperature (the outlet temperature of the heat exchanger 2) (step S106).
  • step S107 the power consumption of the pump 4 is calculated based on the set heat medium temperature and the heat medium flow rate set in step S105 (step S107). Further, the power consumption of the pump 33 is calculated in the same manner based on the flow rate sensor 93 (step S107). These calculations are performed based on the relationship between the flow rate and power consumption in each pump, which is calculated in advance.
  • step S108 the simulation unit 5 c calculates the power consumption of the heat pump 3 and the outlet temperature of the heat medium in the evaporator 3 a in the heat pump 3 based on the preset characteristics of the heat pump 3.
  • the inlet temperature, outlet temperature and flow rate of the condenser 3c in the heat pump 3 and the inlet temperature and flow rate of the evaporator 3a are used as parameters.
  • the measured value by the temperature sensors 73 and 74 and the flow sensor 93 is used for the inlet temperature, the outlet temperature, and the flow rate of the condenser 3c in the heat pump 3, respectively.
  • the flow rate of the heat medium in the evaporator 3a is set in step S105 (the value set in step S113 after the second calculation), and the inlet temperature of the heat medium in the evaporator 3a is set in step S106. It is the value of the outlet temperature of the heat exchanger 2 (after the second calculation, the value of the outlet temperature of the heat exchanger 2 calculated in step S109).
  • the simulation unit 5c Based on the power consumption of the pumps 4 and 33 obtained in the above step S107 and the power consumption of the heat pump 3 obtained in step S108, the simulation unit 5c performs the power generation amount of the solar cell 1 and heat exchange with the solar cell 1.
  • the heat balance with the container 2 is calculated (step S109). First, the surface temperature of the solar cell 1 is calculated. A specific calculation method is the same as the method described in step S103. Then, by calculating the heat balance, the outlet temperature of the heat exchanger 2, that is, the inlet temperature of the heating medium of the evaporator 3a of the heat pump 3 is calculated. The calculated surface temperature is an estimated value at the heat medium flow rate set in step S105 (the heat medium flow rate set in step S113 after the second calculation). Furthermore, the power generation amount of the solar cell 1 is calculated from the surface temperature of the solar cell 1 based on a predetermined formula that reflects the temperature-efficiency characteristics of the solar cell 1.
  • the amount of solar radiation, the outside air temperature, the power generation amount of the solar cell 1, the inlet temperature of the heat medium, and the flow rate are used as parameters.
  • the solar radiation amount is the value calculated in step S104
  • the outside air temperature is the value measured by the temperature sensor 79.
  • the power generation amount of the solar cell 1 uses the value calculated in step S102 (after the second calculation, the value calculated in the previous step S109).
  • the inlet temperature of the heat exchanger 2 of the heat medium the outlet temperature of the heat medium of the evaporator 3a of the heat pump 3 calculated in step S108 is used, and the flow rate of the heat medium is the value set in step S105 ( For the second and subsequent times, the value set in step S113) is used.
  • the outlet temperature of the heat exchanger 2 of the heat medium calculated (estimated) in step S109 is stored in a storage unit (not shown).
  • the simulation unit 5c While the calculated outlet temperature of the heat exchanger 2 of the heat medium is stored, the simulation unit 5c stores the stored outlet temperature of the heat exchanger 2 of the heat medium at the time of the previous calculation and the value calculated this time. Are compared (determined) (step S110). In addition, since there is no comparison target at the time of the first calculation, the determination is not performed. Specifically, the simulation unit 5c determines whether or not the difference between the stored previous value and the currently calculated value is smaller than a predetermined value (for example, 0.1 ° C. or less) (whether or not it has converged). ).
  • a predetermined value for example, 0.1 ° C. or less
  • step S107 to step S110 are performed again, and the convergence determination is performed again. And when it is judged that it has converged (Yes direction of step S110), it progresses to step S111. Then, the difference between the calculated power generation amount and the power consumption calculated in steps S107 and S108 is calculated and stored in a storage unit (not shown) (step S111). This difference is stored together with the flow rate set in step S105. Incidentally, when the outlet temperature (estimated value) of the heat exchanger 2 of the heat medium converges, the inlet temperature (estimated value) of the heat exchanger 2 also converges.
  • the optimum output calculation unit 5b determines whether or not the flow rate set in step S105 is the lowest flow rate that can be set in the pump 4 (step S112). In this embodiment, in step S105, the maximum flow rate is set at the start of operation. Therefore, after the first calculation, the process proceeds in the No direction of step S112. Then, the flow rate of the heat medium is decreased by a predetermined increment (step S113), and the decreased flow rate is set again (step S105). Thereafter, steps S106 to S112 are repeated.
  • step S112 if the flow rate set in step S105 is the minimum flow rate, the process proceeds in the Yes direction in step S112. Then, the optimum calculation output unit 5b compares all the difference values stored by the simulation unit 5c (step S114). After the comparison, the optimum calculation output unit 5b extracts the flow when the difference is the smallest, that is, the power that can be taken out is the largest, and outputs it to the outside (step S115).
  • the output to the outside may be displayed on a display, for example, or may be directly transmitted to the control unit 5d to control the pump 4. In this embodiment, the output to the outside is directly transmitted to the control unit 5d and the pump 4 is controlled.
  • the suppliable power determined by complicated factors such as the amount of solar radiation, power consumption of the pump and heat pump, and heat radiation from the surface of the solar cell 1 to the outside is extracted to the maximum extent. be able to. Therefore, more efficient use of solar energy can be achieved.
  • the circulation of the heat medium has been mainly described.
  • the flow of water controlled by the pump 33 water supply to the heat pump 3 is not particularly limited. Therefore, the pump 33 and the like may be appropriately controlled so that the temperature and amount of water stored in the hot water supply tank 13 become desired.
  • the solar energy utilization system 200 includes a heat exchanger 3e instead of the heat pump 3.
  • a heat exchanger 3e instead of the heat pump 3.
  • the temperature of the heat medium supplied to the heat exchanger 2 is increased throughout the year. Therefore, water can be sufficiently heated by directly transmitting solar heat to the water with the heat exchanger 3e, and there is no need to provide a heat pump. Therefore, the power consumption in the solar energy utilization system 200 can be suppressed by using a heat exchanger that consumes less power than the heat pump.
  • the heat medium discharged from the heat exchanger 3e is cooled by a cooler (not shown), and the cooled heat medium is heat-exchanged. You may comprise so that it may be supplied to the container 2.
  • control can be performed in the same manner as the flow shown in FIG.
  • the configuration of the solar energy utilization system 300 will be described with reference to FIG. Components similar to those of the solar energy utilization system 100 of FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the hot water supply tank 13 has a horizontally long form for the sake of space, but actually has a vertically long form (long in the vertical direction).
  • the solar energy utilization system 300 includes temperature sensors 73 to 78 and 81 to 84 that measure the temperature at each position. Furthermore, inverter-controlled pumps 32 to 37 for controlling the flow rate of water or heat medium at each position are provided. Then, flow rate sensors 92 to 97 for measuring the flow rate at each position are provided. Since these all have the same functions as those described with reference to FIG.
  • the heat medium discharged from the heat exchanger 2 is temporarily stored in the high-temperature heat medium tank 11.
  • the stored heat medium branches and is supplied to the heat pumps 14 and 16 and the heat exchanger 15. And after supplying heat with respect to water with the heat pumps 14 and 16 and the heat exchanger 15, it is stored in the low-temperature heat-medium tank 12.
  • FIG. Thereafter, the heat medium stored in the low-temperature heat medium tank is supplied to the heat exchanger 2 again.
  • the heat pumps 14 and 16 have the same configuration as the heat pump 3 shown in FIG. Therefore, the description about the heat pumps 14 and 16 is omitted.
  • the temperature of the discharged water (temperature measured by the temperature sensors 74 and 76) is set to 45 ° C. Therefore, when the temperature of the heat medium in the high-temperature heat medium tank 11 is 46 ° C. or higher, the heat medium is supplied to the heat exchanger 15.
  • a case is, for example, a case where the outside air temperature measured by the temperature sensor 79 is high (for example, in summer, the installation location is a tropical area, etc.).
  • the temperature is lower than 46 ° C., the heat pump 14 is supplied.
  • the heat medium when the temperature of the heat medium is equal to or higher than a predetermined value (46 ° C. in the above example), it is not necessary to raise the temperature of the heat medium, so the heat medium may be supplied to the heat exchanger 15.
  • a predetermined value 46 ° C. in the above example
  • the heat medium is supplied to the heat pump 14.
  • the power consumption of the heat pump 14 can be reduced by supplying the heat medium to the heat pump 14 or the heat exchanger 15 according to the temperature of the heat medium discharged from the heat exchanger 2. . Therefore, a solar energy utilization system with better energy efficiency can be provided.
  • the PID controller 110 is connected to the temperature sensor 76 for measuring the temperature of the water discharged from the heat exchanger 15 and the pump 34 via an electric signal line.
  • the water can be heated to 45 ° C. by controlling the pump 34 while measuring the temperature of the discharged water by the temperature sensor 76. That is, when the temperature measured by the temperature sensor 76 is lower than 45 ° C., the pump 34 may be controlled to increase the flow rate of the heat medium, and when the temperature is higher than 45 ° C., the flow rate of the heat medium is decreased.
  • the control to be performed may be performed on the pump 34. Thereby, water can be reliably heated so that the temperature of water may be 45 degreeC.
  • the heat medium is also supplied to the heat pump 16. And fluids, such as water, are flowing in the direction opposite to the direction of flow of this heat carrier. Therefore, also in the heat pump 16, heat exchange is performed in the same manner as in the heat pump 14, and the heat medium transferred to the fan coil unit 17 is supplied. Thereby, warm air is discharged from the fan coil unit 17. That is, according to the solar energy utilization system 300, it is possible to simultaneously perform power supply, hot water supply, and heating to the outside using sunlight.
  • the temperature and flow rate of water supplied to the heat pump 14 and the heat exchanger 15 are not particularly limited, and may be set in the same manner as the solar energy utilization system 100 described above. Moreover, what is necessary is just to perform control of each pump, the heat exchangers 2 and 15, and the heat pumps 14 and 16 similarly to control of the solar energy utilization system 100 demonstrated with reference to FIG.
  • the PID controller 110 is used to control the heat exchanger 15, but may be used to control the heat pump 14 or the heat pump 16. Further, such a PID controller 110 may be similarly provided in the first embodiment shown in FIG. 1 or the second embodiment shown in FIG. Furthermore, you may control according to the temperature of the supplied water instead of the temperature of the discharged water. Even if it does in this way, there exists the same effect. That is, the supply amount (supply flow rate) of the heat medium may be controlled according to the temperature of the fluid to be heated such as water.
  • feedback control other than PID control or control such as feedforward control can be performed as appropriate.
  • the flow rate control by the pump 4 is performed by the rotation control by the inverter.
  • a normal pump, a damper and a flow rate adjustment valve are provided, and the opening degree of the damper and the flow rate adjustment valve are adjusted. You may make it change with an opening degree etc. Such a case also corresponds to “control of the flow rate (circulation amount) by the circulation pump”.

Abstract

La présente invention concerne un système utilisant l'énergie solaire, qui permet d'améliorer l'efficacité d'utilisation de l'énergie solaire par rapport à l'art antérieur. Ledit système utilisant l'énergie solaire est pourvu d'une pile solaire (1) et obtient de l'énergie de ladite pile solaire (1). Le système utilisant l'énergie solaire est caractérisé en ce qu'il comporte les éléments suivants : un premier échangeur de chaleur (2) destiné à refroidir la pile solaire (1); une pompe à chaleur (3) reliée au premier échangeur de chaleur (2); une pompe de circulation (4) destinée à faire circuler un milieu chauffant entre le premier échangeur de chaleur (2) et la pompe à chaleur (3); et une unité de commande de débit (5) destinée à modifier le débit de la pompe de circulation (4). En variante, le système utilisant l'énergie solaire est caractérisé en ce qu'il comporte les éléments suivants : un premier échangeur de chaleur (2) destiné à refroidir le pile solaire (1); un second échangeur de chaleur (3e) relié au premier échangeur de chaleur (2); une pompe de circulation (4) destinée à faire circuler un milieu chauffant entre le premier échangeur de chaleur (2) et le second échangeur de chaleur (3e); et une unité de commande de débit (5) destinée à modifier le débit de la pompe de circulation (4).
PCT/JP2012/075763 2011-10-07 2012-10-04 Système utilisant l'énergie solaire WO2013051642A1 (fr)

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CN201280048513.9A CN103890499A (zh) 2011-10-07 2012-10-04 太阳能利用系统
IN2534CHN2014 IN2014CN02534A (fr) 2011-10-07 2012-10-04
GBGB1314899.4D GB201314899D0 (en) 2011-10-07 2012-10-04 System using solar energy
SG11201401315TA SG11201401315TA (en) 2011-10-07 2012-10-04 Solar energy application system

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JP2011223365A JP5779070B2 (ja) 2011-10-07 2011-10-07 太陽エネルギ利用システム
JP2011-223365 2011-10-07

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IN2014CN02534A (fr) 2015-06-26
JP5779070B2 (ja) 2015-09-16

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