CN210742178U - Heat storage performance test system for non-phase-change heat storage type solar air heat collector - Google Patents
Heat storage performance test system for non-phase-change heat storage type solar air heat collector Download PDFInfo
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- CN210742178U CN210742178U CN201921623906.3U CN201921623906U CN210742178U CN 210742178 U CN210742178 U CN 210742178U CN 201921623906 U CN201921623906 U CN 201921623906U CN 210742178 U CN210742178 U CN 210742178U
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Abstract
A heat storage performance test system of a non-phase-change heat storage type solar air heat collector comprises a solar air heat collection system and a test device, wherein the solar air heat collection system comprises a multi-channel solar air heat collector, an air flow adjusting device, an air temperature and humidity adjusting device, an air-water heat exchanger and a water tank; a heat storage pipe is arranged in a solar vacuum heat collecting pipe in the multi-channel solar air heat collector, one end of the heat storage pipe is open, and an opening and closing end cover is arranged at the opening; the testing device comprises an air outlet hygrothermograph, an air inlet hygrothermograph, a meteorological device, a water inlet thermometer, a water outlet thermometer and an air flow meter. The system has a simple structure and accurate test, can test the instantaneous efficiency of the solar air heat collection system containing the heat storage device and the heat storage time of the heat storage material, increases the gas-water heat exchanger and the water tank, and can convert the heat generated by the heat collector into the temperature rise of water; the heat storage capacity of the heat storage material is analyzed through the heat gain of water in the water tank.
Description
Technical Field
The utility model relates to a system for be arranged in non-phase change heat accumulation formula solar energy air heating system heat accumulation material capability test belongs to solar energy air heating system capability test technical field.
Background
Solar energy is used as a new energy, and has three characteristics compared with the conventional energy:
1. the energy source is the most abundant energy source which can be utilized by human beings, and is inexhaustible;
2. solar energy is available anywhere on the earth, can be developed and utilized on site, has no transportation problem, and has utilization value particularly for rural areas, islands and remote areas with inaccessible traffic;
3. the ecological balance is not influenced, and pollution and public nuisance are not caused absolutely. Therefore, solar energy is widely used as a clean renewable energy source in building heating, fresh air heating and the like.
But at the same time, because the energy density of the solar energy is lower, the influence of the weather is very serious. Therefore, there is a need to structurally integrate solar collectors with energy storage systems.
A heat storage tube is arranged in an all-glass solar vacuum heat collection tube, and a heat storage material is placed in the heat storage tube, so that the space in the all-glass solar vacuum heat collection tube and the vacuum heat preservation effect can be fully utilized, heat generated by the sun is stored in a high-temperature time period while wind is guided, the heat is automatically released after sunset, the all-day heat supply temperature can be balanced, and the contribution rate of solar energy is prolonged and increased as much as possible.
There are many common non-phase-change heat storage materials, and there is no specific test method for the difference of heat storage performance of these heat storage materials.
CN108709903A discloses an equipment for testing textile heat storage performance, including the sample mesa, the sample mesa is located the recess below at equipment middle part, and sample mesa below is provided with irradiance sensor and temperature sensor, be provided with the light filter on the sample mesa top equipment recess, the light filter top is provided with the xenon lamp, the display screen left side is provided with ambient temperature sensor. CN101358940 discloses a phase transition heat accumulation tester, by the water bath, the stabiliser, solid state relay, power converter, temperature detector, data acquisition appearance and computer constitute.
The heat storage performance testing technology is not suitable for testing the heat storage performance of the non-phase-change heat storage solar air heat collector.
Disclosure of Invention
The utility model discloses to the difference of non-phase change heat storage material heat accumulation ability and the not enough of test technology existence, provide a simple structure, test accurate non-phase change heat storage formula solar energy air heat collector heat accumulation capability test system.
The utility model discloses a non-phase change heat accumulation formula solar energy air heat collector heat accumulation capability test system adopts following technical scheme:
the device comprises a solar air heat collection system and a testing device;
the solar air heat collection system comprises a multi-channel solar air heat collector, an air flow adjusting device, an air temperature and humidity adjusting device, an air-water heat exchanger and a water tank; the multi-channel solar air heat collector, the air flow adjusting device and the air temperature and humidity adjusting device are connected through an air guide pipeline, an air-water heat exchanger is arranged on a pipeline between an air outlet (a hot air outlet) of the multi-channel solar air heat collector and the air temperature and humidity adjusting device, and the air-water heat exchanger is connected with the water tank; the multi-channel solar air collector comprises a multi-channel header and all-glass solar vacuum heat collecting tubes, and all the all-glass solar vacuum heat collecting tubes are connected to the multi-channel header. A heat storage pipe is arranged in the all-glass solar vacuum heat collecting pipe, one end of the heat storage pipe is opened, and an opening and closing end cover is arranged at the opening;
the testing device comprises an air outlet hygrothermograph, an air inlet hygrothermograph, a meteorological device, a water inlet thermometer, a water outlet thermometer and an air flow meter; the air outlet hygrothermograph and the air inlet hygrothermograph are respectively connected with the air outlet and the air inlet of the multi-channel header; the meteorological device is arranged on one side of the multi-channel solar air heat collector; the water inlet thermometer and the water outlet thermometer are respectively connected with the water inlet and the water outlet of the water tank.
The middle of the heat storage pipe is an air supply channel connected with an air inlet of the multi-channel header, and the two sides of the heat storage pipe are air outlet channels connected with an air outlet of the multi-channel header.
The air outlet hygrothermograph, the air inlet hygrothermograph, the meteorological device, the water inlet thermometer, the water outlet thermometer and the air flow meter are all connected with a data collector.
The heat obtaining efficiency of the multi-channel solar air heat collector is calculated by collecting the air temperature, humidity, air flow and solar irradiance of the inlet and the outlet of the multi-channel solar air heat collector. The heat release amount of the heat storage material is calculated by collecting the temperature of the inlet and the outlet of the water tank, and the performances of different heat storage materials are further analyzed.
The utility model discloses simple structure, test are accurate, have following characteristics:
1. the portable testing system can calculate the instantaneous efficiency of the solar air heat collecting system with the heat storage device and the heat storage time of the heat storage material.
2. The heat storage pipe is designed into an open-close type energy storage cavity and can be filled with different heat storage materials so as to analyze the heat storage capacity of the heat storage pipe under the same experimental condition.
3. The gas-water heat exchanger and the water tank are added, so that heat generated by the heat collector can be converted into temperature rise of water; the heat release amount of the heat storage material is calculated through the heat gain amount of water in the water tank, and the heat storage capacity of the heat storage material is analyzed.
Drawings
Fig. 1 is the structural principle schematic diagram of the heat storage performance test system of the non-phase-change heat storage type solar air heat collector of the utility model.
Fig. 2 is a structural schematic diagram of an open-close type energy storage cavity.
FIG. 3 is a graphical representation of collector instantaneous efficiency versus time.
In the figure: 1. an air outlet hygrothermograph; 2. an air inlet hygrothermograph; 3. a meteorological device; 4. a water inlet thermometer; 5. a water outlet thermometer; 6. an air flow meter; 7. a data acquisition unit; 8. the solar heat collector comprises an air flow adjusting device, 9 air temperature and humidity adjusting devices, 10 air-water heat exchangers, 11 water tanks, 12 multi-channel solar air heat collectors, 13 multi-channel header tanks, 14 all-glass solar vacuum heat collecting tubes, 15 opening and closing end covers, 16 heat storage tubes, 17 non-phase-change heat storage materials, 18 air supply channels and 19 air outlet channels.
Detailed Description
The utility model discloses a non-phase change heat accumulation formula solar energy air heat collector heat accumulation capability test system, including solar energy air heat collecting system and testing arrangement.
The solar air heat collection system comprises a multi-channel solar air heat collector 12, an air flow adjusting device 8, an air temperature and humidity adjusting device 9, an air-water heat exchanger 10 and a water tank 11. The multi-channel solar air heat collector 12 is mounted on the fixed support, and comprises a multi-channel header 13 and a plurality of (50) all-glass evacuated solar collector tubes 14, wherein each all-glass evacuated solar collector tube 14 is connected to the multi-channel header 13. A heat storage tube 16 is arranged in the all-glass solar vacuum heat collection tube 14, one end of the heat storage tube 16 is open, an opening end cover 15 is arranged at the opening, and different types of non-phase-change heat storage materials 17 are filled in the heat storage tube 16. The middle of the heat storage pipe 16 is provided with an air supply duct 18 connected with an air inlet of the multi-channel header 13, and two sides of the heat storage pipe 16 are provided with air outlet ducts 19 connected with an air outlet of the multi-channel header 13, so that the cold air can be heated, and certain heat can be accumulated.
The multi-channel solar air heat collector 12, the air flow adjusting device 8 and the air temperature and humidity adjusting device 9 are connected into a closed circulation pipeline through an air guide pipeline. A gas-water heat exchanger 10 is arranged on a pipeline between a hot air outlet of a multi-channel solar air heat collector 12 and an air temperature and humidity adjusting device 9, the gas-water heat exchanger 10 is connected with a water tank 11, and the gas-water heat exchanger 10 exchanges heat between hot air and water in the water tank 10.
As shown in fig. 2, the open-close end cover 15 at the opening of the heat storage tube 16 is opened, the heat storage material 17 is filled in the heat storage tube 16, the heat storage tube 16 is filled in the all-glass solar vacuum heat collection tube 14, and 50 heat collection tubes are uniformly and fixedly connected to two sides of the multi-channel header 13 to form the multi-channel solar air heat collector 12.
The testing device comprises an air outlet hygrothermograph 1, an air inlet hygrothermograph 2, a meteorological device 3, a water inlet thermometer 4, a water outlet thermometer 5, an air flow meter 6 and a data collector 7. The air outlet hygrothermograph 1, the air inlet hygrothermograph 2, the meteorological device 3, the water inlet thermometer 4, the water outlet thermometer 5 and the air flow meter 6 are all connected with the data acquisition unit 7, and the acquired data are transmitted to the terminal equipment in real time. The air outlet hygrothermograph 1 and the air inlet hygrothermograph 2 are respectively connected with an air outlet and an air inlet of the multi-channel header 13 and respectively collect the outlet air temperature and humidity and the inlet air temperature and humidity of the multi-channel solar air heat collector 12. The meteorological device 3 is arranged on one side of the multi-channel solar air heat collector 12 and can monitor solar irradiance, environment temperature and humidity, wind speed and wind direction. The water inlet thermometer 4 and the water outlet thermometer 5 are respectively connected to the water inlet and the water outlet of the water tank 11, and respectively monitor the water temperatures of the water inlet and the water outlet of the water tank 11.
The test procedure of the above system is as follows.
(1) Instantaneous efficiency η calculation for solar air collector
When the weather is clear, the solar air heat collecting system is placed under the irradiation of sunlight, the instantaneous efficiency η of the multi-channel solar air heat collector 12 is calculated by collecting the temperature and humidity of the air at the inlet and the outlet of the multi-channel solar air heat collector 12, the air flow and the solar irradiance within a certain time period, and the specific calculation formula is as follows:
η instantaneous efficiency of heat collector;
cpma: air specific heat capacity (calculated from a table look-up of air temperature and humidity), J/(kg ℃.);
t1: the temperature of the air at the outlet of the collector is at DEG C;
t2: the inlet air temperature of the collector is at DEG C;
Ag: total area of collector, m2；
G: solar irradiance, W/m2。
Note: during the test, the total solar irradiance on the lighting surface of the heat collector is not less than 700W/m2The wind speed of the surrounding environment should not be higher than 4m/s, the average surrounding temperature is 8-35 ℃, and the humidity of the surrounding environment should not be higher than 80%.
In the initial stage of the test, because the heat storage material can absorb part of heat, the instantaneous efficiency of the multi-channel solar air heat collector 12 is lower, and along with the gradual reduction of the heat absorption of the heat storage material, the instantaneous efficiency of the heat collector will gradually increase until being stable, and the heat storage material is determined to completely store heat (time t). During the test period (from the start of irradiation of the collector 12 by the sun to complete heat storage of the heat storage material), data was recorded every 10s, and a curve of the instantaneous efficiency of the collector as a function of time was obtained, as shown in fig. 3.
(2) Calculation of heat release amount of heat storage material
After the heat storage material 17 stores heat completely, the solar air heat collector 12 is shielded, the air-water heat exchanger 10 is started, and the heat storage material 17 releases heat. When the water temperature t at the inlet of the water tank 11 is4And the outlet water temperature t5When the difference is less than +/-0.5 ℃, the heat release is determined to be finished, and the heat release amount of the heat storage material is calculated by collecting the inlet and outlet temperatures of the water tank 11, wherein the specific calculation formula is as follows:
Q＝cwater (W)×mWater (W)×{[t(4,1)+t(5,1)]/2-[t(4,0)+t(5,0)]/2}，
Q: heat release, J;
cwater (W): specific heat capacity of water, J/(kg. DEG C.);
mwater (W): the mass of water in the water tank is kg;
t(4,1)，t(5,1): the water temperatures of the inlet and the outlet of the water tank are controlled at the temperature of DEG C when the heat release is finished;
t(4,0)，t(5,0): the water temperature at the inlet and outlet of the water tank is at the temperature of DEG C when the heat release is started.
(3) Total efficiency ηGeneral assemblyIs calculated by
Total efficiency η of the entire test systemGeneral assemblyThe solar radiation amount in the heat release amount Q/t time period.
The type of the heat storage material 17 filled in the heat storage tube 16 is changed, and the heat release amount of different types of heat storage materials and the instantaneous efficiency of the multi-channel solar air heat collector 12 can be obtained according to the process.
And (4) comparing the heat release quantity of different heat storage materials after heat storage under the same irradiation quantity condition, so as to analyze the heat storage performance of different heat storage materials.
The air flow adjusting device 8, the air temperature and humidity adjusting device 9, the gas-water heat exchanger 10, the multi-channel header 13, the all-glass solar vacuum heat collecting tube 14, the hygrothermograph, the meteorological device, the thermometer, the air flow meter and the like which are not described in detail are all the conventional general technologies.
Claims (3)
1. The utility model provides a non-phase change heat accumulation formula solar energy air heat collector heat accumulation performance test system which characterized by: the solar air heat collection system comprises a solar air heat collection system and a testing device;
the solar air heat collection system consists of a multi-channel solar air heat collector, an air flow adjusting device, an air temperature and humidity adjusting device, an air-water heat exchanger and a water tank; the multi-channel solar air heat collector, the air flow adjusting device and the air temperature and humidity adjusting device are connected through an air guide pipeline, an air-water heat exchanger is arranged on a pipeline between an air outlet of the multi-channel solar air heat collector and the air temperature and humidity adjusting device, and the air-water heat exchanger is connected with the water tank; the multi-channel solar air collector comprises a multi-channel header and all-glass solar vacuum heat collecting tubes, each all-glass solar vacuum heat collecting tube is connected to the multi-channel header, a heat storage tube is mounted in each all-glass solar vacuum heat collecting tube, one end of each heat storage tube is open, and an opening and closing end cover is arranged at each opening;
the testing device comprises an air outlet hygrothermograph, an air inlet hygrothermograph, a meteorological device, a water inlet thermometer, a water outlet thermometer and an air flow meter; the air outlet hygrothermograph and the air inlet hygrothermograph are respectively connected with the air outlet and the air inlet of the multi-channel header; the meteorological device is arranged on one side of the multi-channel solar air heat collector; the water inlet thermometer and the water outlet thermometer are respectively connected with the water inlet and the water outlet of the water tank.
2. The heat storage performance test system of the non-phase-change heat storage type solar air collector according to claim 1, characterized in that: the middle of the heat storage pipe is an air supply channel connected with an air inlet of the multi-channel header, and the two sides of the heat storage pipe are air outlet channels connected with an air outlet of the multi-channel header.
3. The heat storage performance test system of the non-phase-change heat storage type solar air collector according to claim 1, characterized in that: the air outlet hygrothermograph, the air inlet hygrothermograph, the meteorological device, the water inlet thermometer, the water outlet thermometer and the air flow meter are all connected with a data collector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921623906.3U CN210742178U (en) | 2019-09-27 | 2019-09-27 | Heat storage performance test system for non-phase-change heat storage type solar air heat collector |
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| CN201921623906.3U CN210742178U (en) | 2019-09-27 | 2019-09-27 | Heat storage performance test system for non-phase-change heat storage type solar air heat collector |
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