WO2015060405A1 - Système d'exploitation de chaleur solaire - Google Patents

Système d'exploitation de chaleur solaire Download PDF

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Publication number
WO2015060405A1
WO2015060405A1 PCT/JP2014/078257 JP2014078257W WO2015060405A1 WO 2015060405 A1 WO2015060405 A1 WO 2015060405A1 JP 2014078257 W JP2014078257 W JP 2014078257W WO 2015060405 A1 WO2015060405 A1 WO 2015060405A1
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WO
WIPO (PCT)
Prior art keywords
heat
temperature
pump
collector
storage tank
Prior art date
Application number
PCT/JP2014/078257
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English (en)
Japanese (ja)
Inventor
正登 小粥
義裕 市野
元巳 稲垣
Original Assignee
矢崎エナジーシステム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 矢崎エナジーシステム株式会社 filed Critical 矢崎エナジーシステム株式会社
Priority to CN201480057971.8A priority Critical patent/CN105723162B/zh
Publication of WO2015060405A1 publication Critical patent/WO2015060405A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
    • F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with 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
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1042—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00—Arrangements for controlling solar heat collectors
    • F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
    • 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
    • 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 storage system such as a solar heat utilization system.
  • Such a solar heat utilization system circulates a heat medium by driving a pump.
  • the pump starts operation when the temperature difference between the heat medium temperature in the solar heat collecting device and the heat storage temperature in the heat storage tank is equal to or higher than the first predetermined value, and is lower than the second predetermined value lower than the first predetermined value. Operation stops.
  • the heat medium temperature of the solar heat collecting device during the pump stop tends to be detected differently depending on the mounting position of the temperature sensor.
  • the detected temperature of the heat medium tends to vary depending on the installation location. There is.
  • the heat medium temperature is not detected differently only when a temperature sensor is installed in the return pipe, but is detected differently due to various factors such as contamination of the heat collecting part of the solar heat collecting device. It is.
  • the temperature difference is unlikely to be equal to or higher than the first predetermined value, and from the original temperature of the heat medium, the temperature difference is equal to or higher than the first predetermined value. In spite of this, the pump may not operate and the heat collection efficiency may be reduced.
  • the above problem is not limited to the solar heat utilization system that supplies hot water stored in the heat storage tank to the home, etc., but also uses solar heat that uses the heat medium and heat stored in the heat storage tank for the operation of other equipment. This is a common problem in the system.
  • the present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a solar heat utilization system capable of improving the heat collection efficiency.
  • the solar heat utilization system of the present invention includes a heat collecting device that heats a heat medium by receiving sunlight, a heat storage tank that stores heat by introducing the heat medium heated by the heat collecting apparatus, and the heat storage tank.
  • a pump that circulates the heat medium again to the heat storage tank through the heat collection device, a plurality of first temperature sensors that detect the temperature of the heat medium heated by the heat collection device, and a heat storage temperature in the heat storage tank.
  • the average value of the temperature difference between the second temperature sensor for detecting the temperature, the temperature of the heat medium detected by the plurality of first temperature sensors, and the heat storage temperature detected by the second temperature sensor is equal to or greater than a first predetermined value.
  • Control means for operating the pump in the event that the value becomes equal to or less than a second predetermined value that is lower than the first predetermined value, and stopping the pump when the average value is lower than the first predetermined value. 1 or to heat the heating medium by receiving sunlight
  • a plurality of heat collector groups each constituted by a plurality of heat collectors, wherein the plurality of first temperature sensors are provided for two or more heat collector groups of the plurality of heat collector groups.
  • the control means predetermines the pump when the average value is not equal to or greater than the first predetermined value while the pump is stopped and a part of the temperature difference is equal to or greater than the first predetermined value. It is characterized by being operated for hours.
  • a part of the temperature difference between the temperature of the heat medium detected by the plurality of first temperature sensors and the heat storage temperature detected by the second temperature sensor is a first predetermined value.
  • the pump is operated for a predetermined time. For this reason, a heat medium will be stirred by the driving
  • the temperature of the heat medium in the heat collector is averaged by stirring, and the mounting position of the first temperature sensor has an effect.
  • it is possible to reduce the frequency of occurrence of a situation where heat can be collected even though it can be collected. Therefore, it is possible to improve the heat collection efficiency.
  • the control means detects the temperature of the heat medium detected by one of the plurality of first temperature sensors and the other first temperature sensors excluding the one.
  • the one first temperature sensor or the heat collector group provided with the one first temperature sensor is in an abnormal state. It is preferable to judge.
  • the one temperature sensor or the heat collector group provided with the one first temperature sensor is determined to be in an abnormal state.
  • the case where there is a difference greater than a specified value with respect to the average value includes sensor failure, dirt on the panel surface of the heat collecting device, clogging of the flow path, and the like.
  • the heat collector is of a vacuum tube type, the vacuum tube is broken. Therefore, when such a detection value is shown, it can be determined that the state is abnormal.
  • the average value is not limited to the average value itself, but is a concept including a value obtained by further calculating the average value, that is, a value derived from the average value.
  • FIG. 1 is a schematic configuration diagram of a heat storage system according to an embodiment of the present invention.
  • FIG. 2 is a configuration diagram showing details of the solar heat collecting apparatus shown in FIG. 1.
  • FIG. 3 is a diagram illustrating pump control by the control panel according to the present embodiment.
  • FIG. 4 is a flowchart showing a control method of the heat storage system according to the present embodiment.
  • FIG. 1 is a schematic configuration diagram of a heat storage system according to an embodiment of the present invention.
  • a heat storage system 1 performs heat storage using solar heat, and includes a solar heat collector (heat collector) 11, a heat storage tank 12, and a heat collection channel. 13 and a heat collecting pump (pump) 14.
  • the solar heat collector 11 heats the heat medium by receiving sunlight, and is installed at a position that is easy to receive sunlight and has an inclination, for example, on a roof.
  • the heat medium water, antifreeze, propylene glycol aqueous solution, or the like is used.
  • the heat storage tank 12 introduces a heat medium heated by the solar heat collector 11 and stores heat.
  • the heat storage tank 12 is a tank that stores a heat medium therein. Moreover, the heat storage tank 12 may store the heat of the introduced heat medium with a heat storage material.
  • the heat storage tank 12 is connected to a heat utilization device (for example, an absorption chiller / heater) that operates using heat, and the heat stored in the heat accumulation tank 12 is used by the heat utilization device.
  • a heat utilization device for example, an absorption chiller / heater
  • the heat storage tank 12 stores heat with a heat storage material
  • a heat storage material for example, magnesium hydroxide is used as the heat storage material, but is not limited thereto.
  • the heat storage tank 12 may function as a so-called hot water storage tank, and hot water may be supplied to a home or the like.
  • the heat storage tank 12 may be of a type including a heat exchanger.
  • the heat collection channel 13 is a pipe that circulates the heat medium from the heat storage tank 12 to the heat storage tank 12 again through the solar heat collector 11.
  • the flow path from the heat storage tank 12 to the solar heat collection apparatus 11 is referred to as a first heat collection flow path 13a
  • the flow path from the solar heat collection apparatus 11 to the heat storage tank 12 is referred to as a second heat collection flow path 13b.
  • the heat collection pump 14 is provided in the first heat collection flow path 13a of the heat collection flow path 13, and serves as a power source for circulating the heat medium from the heat storage tank 12 to the heat storage tank 12 again through the solar heat collecting apparatus 11. It is.
  • the heat storage system 1 includes a plurality of heat collector temperature sensors (a plurality of first temperature sensors) 15, a heat storage tank temperature sensor (second temperature sensor) 16, and a control panel (control means) 17. It has.
  • the plurality of heat collecting device temperature sensors 15 detect the temperature of the heat medium heated by the solar heat collecting device 11 and transmit a signal corresponding to the heat medium temperature to the control panel 17.
  • the heat storage tank temperature sensor 16 detects the temperature of the heat medium in the heat storage tank 12 (heat storage temperature of the heat storage tank 12), and transmits a signal corresponding to the heat medium temperature to the control panel 17.
  • the control panel 17 includes a CPU (Central Processing Unit) and controls the entire heat storage system 1 by the CPU.
  • the control panel 17 controls the heat collection pump 14 based on the temperature of the heat medium detected by the plurality of heat collector temperature sensors 15 and the heat storage temperature detected by the heat storage tank temperature sensor 16. .
  • FIG. 2 is a configuration diagram showing details of the solar heat collecting apparatus 11 shown in FIG.
  • the solar heat collector 11 is a so-called reverse return type heat collector, and includes a plurality (three) of heat collector groups 11a to 11c.
  • the plurality of heat collector groups 11a to 11c introduce and heat the heat medium in parallel with each other, and the plurality of (five) heat collectors 11a1 to 11a1 to heat the heat medium by receiving sunlight.
  • 11a5, 11b1 to 11b5, 11c1 to 11c5 are respectively configured.
  • the solar heat collector 11 includes a forward pipe 11d, a branch forward pipe 11e1 to 11e3, a return pipe 11f, and a branch return pipe 11g1 to 11g3 in addition to the heat collector groups 11a to 11c. .
  • the forward piping 11d introduces the heat medium from the heat storage tank 12.
  • the branch outgoing pipes 11e1 to 11e3 are pipes, one end of which is connected to the outgoing pipe 11d, for feeding the heat medium from the outgoing pipe 11d to each of the heat collector groups 11a to 11c.
  • the first branch outgoing pipe 11e1 has one end connected to the outgoing pipe 11d and the other end connected to the first heat collector group 11a.
  • the second branch forward pipe 11e2 has one end connected to the forward pipe 11d, the other end connected to the second heat collector group 11b, and is connected in parallel to the first branch forward pipe 11e1.
  • the third branch forward pipe 11e3 has one end connected to the forward pipe 11d, the other end connected to the third heat collector group 11c, and is connected in parallel to the first and second branch forward pipes 11e1 and 11e2. .
  • one end of the first branch outgoing pipe 11e1 is connected to the front side (that is, the side closer to the heat collecting pump 14 and the heat storage tank 12) of the outgoing pipe 11d than the other branch outgoing pipes 11e2 and 11e3.
  • One end of the third branch forward pipe 11e3 is connected to the end of the forward pipe 11d, and one end of the second branch forward pipe 11e2 is an intermediate point in the forward pipe 11d (that is, the first branch forward pipe 11e1 and the forward pipe). Between the connection point of the pipe 11d and the connection point of the third branch forward pipe 11e3 and the forward pipe 11d).
  • the first heat collector group 11a includes a plurality (five) of heat collectors 11a1 to 11a5
  • the first branch outgoing pipe 11e1 has a heat medium in parallel with each of the heat collectors 11a1 to 11a5.
  • the other end is branched into a plurality (5) so as to be supplied.
  • the second and third heat collector groups 11b and 11c are also provided with a plurality (five) of heat collectors 11b1 to 11b5 and 11c1 to 11c5, respectively, so that the second and third branch outgoing pipes 11e2 and 11e3 are provided.
  • the other end side is branched into a plurality (five) so that the heat medium is supplied in parallel to the respective heat collectors 11b1 to 11b5 and 11c1 to 11c5.
  • the return pipe 11f discharges the heated heat medium to the heat storage tank 12 side.
  • the branch return pipes 11g1 to 11g3 are pipes whose other ends are connected to the return pipe 11f, and for transferring the heat medium from the respective heat collector groups 11a to 11c to the return pipe 11f.
  • the first branch return pipe 11g1 has one end connected to the first heat collector group 11a and the other end connected to the return pipe 11f.
  • the second branch return pipe 11g2 has one end connected to the second heat collector group 11b, the other end connected to the return pipe 11f, and connected in parallel to the first branch return pipe 11g1.
  • the third branch return pipe 11g3 has one end connected to the third heat collector group 11c, the other end connected to the return pipe 11f, and connected in parallel to the first and second branch return pipes 11g1 and 11g2. Yes.
  • the other end of the first branch return pipe 11g1 is connected to the end of the return pipe 11f.
  • the other end of the third branch return pipe 11g3 is connected to the near side (that is, the side closer to the heat storage tank 12) than the other branch return pipes 11g1 and 11g2.
  • the other end of the second branch return pipe 11g2 is an intermediate point in the return pipe 11f (that is, a connection point between the first branch return pipe 11g1 and the return pipe 11f, and a connection point between the third branch return pipe 11g3 and the return pipe 11f). Between).
  • the first branch return pipe 11g1 receives a heat medium from each of the heat collectors 11a1 to 11a5 in parallel.
  • One end is branched into a plurality (five) so as to be accepted.
  • the second and third heat collector groups 11b and 11c are also provided with a plurality (five) of heat collectors 11b1 to 11b5 and 11c1 to 11c5, respectively, so that the second and third branch return pipes 11g2 and 11g3 are provided.
  • the plurality of heat collector groups 11a to 11c introduce and heat the heat medium in parallel with each other.
  • the configuration of the solar heat collector 11 is not limited to that shown in FIG. 2, and may be connected to a pipe so as to be, for example, a direct return method, or may be configured by a vacuum tube type heat collector.
  • the solar heat collecting apparatus 11 is of a vacuum tube type, it goes without saying that the plurality of heat collectors 11a1 to 11a5, 11b1 to 11b5, 11c1 to 11c5 are constituted by vacuum tube type heat collecting tubes.
  • the plurality of heat collector groups 11a to 11c include a plurality of heat collectors 11a1 to 11a5, 11b1 to 11b5, and 11c1 to 11c5, respectively. .
  • the heat medium temperature tends to be detected differently depending on the mounting position of the heat collector temperature sensor 15. Further, when only a part of the surface of the heat collector is dirty, the solar heat collector 11 has a plurality of heat collector groups 11a to 11c as a heat medium regardless of the mounting position of the heat collector temperature sensor 15. Differences in temperature may occur.
  • the plurality of heat collector temperature sensors 15 are provided for each of the heat collector groups 11a to 11c as shown in FIG.
  • the first heat collector temperature sensor 15a is provided on the outlet side of the first branch return pipe 11g1 provided for the first heat collector group 11a
  • the second heat collector temperature sensor 15b is the second heat collector temperature sensor 15b.
  • a third heat collecting device temperature sensor 15c is provided on the outlet side of the second branch return pipe 11g2 provided for the heat collector group 11b, and a third branch return pipe provided for the third heat collector group 11c. 11g3 outlet side.
  • the plurality of heat collector temperature sensors 15 are not limited to one provided for each of the heat collector groups 11a to 11c, and are provided two for each of the heat collector groups 11a to 11c. Alternatively, the number of sensors attached to each of the heat collector groups 11a to 11c may be different.
  • the plurality of heat collector temperature sensors 15 are provided for all of the heat collector groups 11a to 11c.
  • the present invention is not limited to this, and two or more heat collector groups ( For example, what is necessary is just to be provided in the 1st and 2nd heat collector group 11a, 11b).
  • the plurality of heat collector temperature sensors 15 be provided at the same position in each of the heat collector groups 11a to 11c. That is, in the example shown in FIG. 2, the plurality of heat collector temperature sensors 15 are provided on the outlet sides of the branch return pipes 11g1 to 11g3, respectively, and are provided at the same positions. This is because the heat collecting pump 14 can be operated more accurately in the processing described later by providing the same position in this way.
  • FIG. 3 is a diagram showing pump control by the control panel 17 according to the present embodiment.
  • the control panel 17 calculates the temperature difference between each temperature of the heat medium detected by the plurality of heat collector temperature sensors 15 and the temperature of the heat medium (heat storage temperature) detected by the heat storage tank temperature sensor 16. calculate.
  • the control panel 17 calculates the average value of the differential temperatures.
  • the control panel 17 heat collecting pump 14 is operated. Further, when it is determined that the differential temperature is equal to or lower than T2 ° C. (second predetermined value) lower than T1 ° C. during the operation of the heat collection pump 14, the control panel 17 stops the heat collection pump 14.
  • control panel 17 executes the following control.
  • FIG. 4 is a flowchart showing a control method of the heat storage system 1 according to the present embodiment. In addition, the process shown in FIG. 4 is repeatedly performed until the heat storage system 1 stops.
  • the control panel 17 calculates an average value of the differential temperatures and determines whether the average value is equal to or higher than T1 ° C. (S1). When it is determined that the average value is equal to or higher than T1 ° C. (S1: YES), the control panel 17 starts the operation of the heat collecting pump 14 (S2).
  • control panel 17 refers to the detected temperature of each of the plurality of heat collecting device temperature sensors 15, and removes the temperature of the heat medium detected by one of the plurality of first temperature sensors 15 and the other one. It is determined whether the average value of the temperature of the heat medium detected by the first temperature sensor 15 has a difference equal to or greater than a specified value (S3). More specifically, the control panel 17 determines whether the difference between the temperature detected by the first heat collector temperature sensor 15a and the temperature detected by the second and third heat collector temperature sensors 15b, 15c is greater than a specified value.
  • step S5 it is determined whether the difference between the detected temperature of the second heat collector temperature sensor 15b and the detected temperature of the first and third heat collector temperature sensors 15a and 15c has a difference equal to or greater than a specified value.
  • step S5 it is determined whether or not the difference between the temperature detected by the third heat collector temperature sensor 15c and the temperature detected by the first and second heat collector temperature sensors 15a and 15b is greater than a specified value.
  • the control panel 17 determines whether the heat collector temperature sensor 15 having a difference equal to or greater than a specified value or the sensor 15 is present. It is determined that the provided heat collector groups 11a to 11c are in an abnormal state, and a display and sound to that effect are output (S4). Examples of the abnormality include failure of the heat collector temperature sensor 15 having a difference of a specified value or more, contamination on the surface of the heat collector of the solar heat collector 11, clogging of the flow path, and the like. In addition, when the heat collectors 11a1 to 11a5, 11b1 to 11b5, and 11c1 to 11c5 are vacuum tube type heat collectors, the vacuum tubes are broken. After output, the process proceeds to step S5.
  • step S5 the control panel 17 calculates an average value of the differential temperatures and determines whether the average value is T2 ° C. or less (S5). When it is determined that the average value is T2 ° C. or less (S5: YES), the control panel 17 stops the operation of the heat collecting pump 14 (S6). Then, the processing shown in FIG. 4 proceeds to step S1. On the other hand, when it is determined that the average value is not equal to or lower than T2 ° C. (S5: NO), the process proceeds to step S2.
  • the control panel 17 detects each temperature of the heat medium detected by the plurality of heat collector temperature sensors 15 and the heat storage tank temperature sensor 16. It is determined whether a part of the temperature difference from the temperature of the heat medium that has been performed is equal to or higher than T1 ° C. (S7).
  • step S1 If it is determined that all are not T1 ° C. or higher (S7: NO), the process proceeds to step S1. On the other hand, when it is determined that a part of the temperature is T1 ° C. or higher (S7: YES), the control panel 17 starts the operation of the heat collecting pump 14 (S8). As a result, the heat medium is agitated, and even if there is a difference in the heat medium temperature in the solar heat collector 11 when the pump is stopped, the heat medium temperature in the solar heat collector 11 is averaged by the agitation. The situation where the operation of the heat collecting pump 14 in step S2 is not performed due to the mounting position of the heat collecting device temperature sensor 15 is prevented.
  • control panel 17 determines whether t minutes have elapsed from the start of operation (S9). If it is determined that t minutes have not elapsed (S9: NO), the process proceeds to step S8. On the other hand, when it is determined that t minutes have elapsed (S9: YES), the control panel 17 determines that the stirring of the heat medium has been completed and stops the operation of the heat collecting pump 14 (S6). Then, the processing shown in FIG. 4 proceeds to step S1.
  • the heat collection pump 14 is operated for t minutes. For this reason, the heat medium is agitated by the operation of the heat collecting pump 14.
  • the heat medium temperature in the solar heat collector 11 is averaged by stirring, and the heat collector temperature in the solar heat collector 11 is averaged.
  • the frequency of occurrence of a situation in which heat is not collected even though the heat can be collected due to the mounting position of the heat device temperature sensor 15 can be suppressed. Therefore, it is possible to improve the heat collection efficiency.
  • one heat collector temperature sensor 15 or the heat collector groups 11a to 11c provided with the heat collector temperature sensor 15 is in an abnormal state.
  • the case where there is a difference greater than a specified value with respect to the average value includes sensor failure, contamination on the surface of the heat collector of the solar heat collector 11, clogging of the flow path, and the like.
  • the heat collectors 11a1 to 11a5, 11b1 to 11b5, and 11c1 to 11c5 are vacuum tube type heat collectors, the vacuum tubes are broken. Therefore, when such a detection value is shown, it can be determined that the state is abnormal.
  • a heat collector (11) that heats the heat medium by receiving sunlight, A heat storage tank (12) for storing heat by introducing a heat medium heated by the heat collector (11); A pump (heat collection pump 14) for circulating a heat medium from the heat storage tank (12) to the heat storage tank (12) again through the heat collecting device (11); A plurality of first temperature sensors (heat collector temperature sensor 15) for detecting the temperature of the heat medium heated by the heat collector (11); A second temperature sensor (heat storage tank temperature sensor 16) for detecting the heat storage temperature in the heat storage tank (12); The average value of the temperature difference between each temperature of the heat medium detected by the plurality of first temperature sensors (heat collector temperature sensor 15) and the heat storage temperature detected by the second temperature sensor (heat storage tank temperature sensor 16).
  • the pump (heat collecting pump 14) is operated when the value becomes equal to or higher than the first predetermined value, and the pump (heat collecting value) when the average value becomes equal to or lower than the second predetermined value lower than the first predetermined value.
  • the heat collector (11) has a plurality of heat collector groups (11a to 11c) each constituted by one or a plurality of heat collectors that heat the heat medium by receiving sunlight.
  • the plurality of first temperature sensors are provided for two or more heat collector groups of the plurality of heat collector groups (11a to 11c),
  • the control means (control panel 17) is configured such that the average value is not equal to or more than the first predetermined value while the pump (heat collecting pump 14) is stopped, and a part of the differential temperature is the first predetermined value.
  • a solar heat utilization system that causes the pump (heat collecting pump 14) to operate for a predetermined time in the case described above.
  • the control means is configured so that the temperature of the heat medium detected by one of the plurality of first temperature sensors (heat collecting device temperature sensor 15) and other than the one are excluded.
  • the one first temperature sensor (heat collector temperature sensor 15) or The solar heat utilization system according to [1], wherein the heat collector group provided with the one first temperature sensor (heat collector temperature sensor 15) is determined to be in an abnormal state.
  • the present invention it is possible to improve the heat collection efficiency.
  • the present invention having this effect is useful for a solar heat utilization system.
  • Thermal storage system (solar heat utilization system) 11 Solar heat collector (heat collector) 11a to 11c Multiple heat collector groups 11a1 to 11a5, 11b1 to 11b5, 11c1 to 11c5 Heat collector 11d Outward pipe 11e1 to 11e3 Branch forward pipe 11f Return pipe 11g1 to 11g3 Branch return pipe 12 Heat storage tank 13 Heat collection path 14 Heat pump (pump) 15 Multiple heat collector temperature sensors (multiple first temperature sensors) 16 Thermal storage tank temperature sensor (second temperature sensor) 17 Control panel (control means)

Abstract

On décrit un système de stockage de chaleur (1) qui comprend: un dispositif de collecte de chaleur solaire (11); un réservoir de stockage de chaleur (12); une pompe de collecte de chaleur (14); de multiples capteurs de température (15) du dispositif de collecte de chaleur; un capteur de température (16) du réservoir de stockage de chaleur; et un tableau de commande (17). Le dispositif de collecte de chaleur solaire (11) comprend de multiples groupes de collecteurs de chaleur (11a-11c) constitués chacun d'un ou de plusieurs collecteurs de chaleur chauffant un milieu thermique par réception de la lumière solaire; et les multiples capteurs de température (15) du dispositif de collecte de chaleur sont installés par rapport à deux ou plusieurs des multiples groupes de collecteurs de chaleur (11a-11c). Pendant le temps d'arrêt de la pompe de collecte de chaleur (14), si la valeur moyenne de l'écart de température entre la température de stockage de chaleur détectée par le capteur de température (16) du réservoir de stockage de chaleur et les températures respectives du milieu thermique détectées par les multiples capteurs de température (15) du dispositif de collecte de chaleur est inférieure à une température T1°C, et si quelques-uns des écarts de température sont égaux ou supérieurs à la température T1°C, le tableau de commande (17) amène la pompe de collecte de chaleur (14) à fonctionner pendant une durée prescrite.
PCT/JP2014/078257 2013-10-23 2014-10-23 Système d'exploitation de chaleur solaire WO2015060405A1 (fr)

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