CN110702851B - Performance test system and method for phase change energy storage device - Google Patents
Performance test system and method for phase change energy storage device Download PDFInfo
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- CN110702851B CN110702851B CN201910848987.5A CN201910848987A CN110702851B CN 110702851 B CN110702851 B CN 110702851B CN 201910848987 A CN201910848987 A CN 201910848987A CN 110702851 B CN110702851 B CN 110702851B
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Abstract
The invention provides a performance test system and a test method of a phase change energy storage device, the test system comprises an air-conditioning room, a cold water tank, a first ball valve, a first circulating water pump, a second ball valve, a third ball valve, a fourth ball valve, a fifth ball valve, a sixth ball valve, a flowmeter, a seventh ball valve, an eighth ball valve, a ninth ball valve, a second circulating water pump, a tenth ball valve, an eleventh ball valve, a twelfth ball valve, a tap water inlet, an air-cooled radiator, a thirteenth ball valve, a phase change energy storage device, a differential pressure sensor, a fourteenth ball valve, a fifteenth ball valve, a data acquisition device and a hot water tank, the heat storage, the heat release and the actual working condition test can be carried out on the phase change energy storage device by opening and closing different parts of the test system, so as to obtain the heat storage characteristic, the heat storage amount, the heat release characteristic, the heat release amount and other parameters of the phase change energy storage device, the test system can be used for the performance test of small and medium-size phase change energy storage devices, the testing method is simple.
Description
Technical Field
The invention belongs to the field of energy storage, relates to a performance test of an energy storage device, and particularly relates to a performance test system and a test method of a phase change energy storage device.
Background
The phase-change material can absorb a large amount of latent heat when melting, but phase-change material's temperature variation range is very little, and the kind of material is more, the melting point scope is big, the user can select the phase-change material of close melting point scope according to the hot water demand temperature, the price is also relatively cheap, phase-change heat storage energy storage is compared traditional hot water heat storage energy storage and has that energy storage density is big, the characteristics that the leaving water temperature is stable, consequently, on traditional heat storage water tank's development basis, phase-change energy storage device takes place in due charge, phase-change energy storage device mainly realizes heat accumulation and heat release function through phase-change material's melting and solidification process, in the aspect of industry waste heat utilization, millet electricity energy storage and solar thermal energy utilization have outstanding advantage.
The phase change energy storage device exchanges heat with the phase change material through the internal heat exchange device, so that the thermophysical property of the phase change material and the heat transfer capacity of the heat exchange device are main factors influencing the phase change heat storage device, and when the heat storage and heat release performances of different phase change materials and heat exchange devices with different structural forms are explored, a set of scientific, reasonable and strong-practicability test system and test method are needed, different working conditions can be simulated, and test data can be acquired under different working conditions.
Disclosure of Invention
The invention aims to provide a performance test system and a test method of a phase change energy storage device.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a phase change energy memory capability test system which characterized in that: the system comprises an air-conditioning room, a cold water tank, a first ball valve, a first circulating water pump, a second ball valve, a third ball valve, a fourth ball valve, a fifth ball valve, a sixth ball valve, a flowmeter, a seventh ball valve, an eighth ball valve, a ninth ball valve, a second circulating water pump, a tenth ball valve, an eleventh ball valve, a twelfth ball valve, a tap water inlet, an air-cooled radiator, a thirteenth ball valve, a phase-change energy storage device, a differential pressure sensor, a fourteenth ball valve, a fifteenth ball valve, a data acquisition device and a hot water tank;
the phase change energy storage device comprises a first port, a second port, a heat exchange coil, a phase change material and a shell, wherein the phase change temperature of the phase change material is 40-80 ℃;
the connection relationship of the test system is as follows: the water outlet of the cold water tank is connected with a first ball valve, the first ball valve is connected with the water inlet of a first circulating water pump, the water outlet of the first circulating water pump is respectively connected with a second ball valve and a thirteenth ball valve, the thirteenth ball valve is connected with an air-cooled radiator, a third ball valve and a fifth ball valve, the air-cooled radiator is connected with the water inlet of the cold water tank, the third ball valve is respectively connected with a fourth ball valve and an eighth ball valve, the second ball valve is respectively connected with the fourth ball valve and a first port of the phase change energy storage device, a differential pressure sensor is connected with a first port and a second port of the phase change energy storage device, a second port of the phase change energy storage device is respectively connected with a fourteenth ball valve and a fifteenth ball valve, the fourteenth ball valve is respectively connected with the water outlet of a sixth ball valve and a water outlet of a flow meter, the fifteenth ball valve is respectively connected with the water inlet of a seventh ball valve and a water inlet of the flow meter, the sixth ball valve and the seventh ball valve are respectively connected with the fifth ball valve and the ninth ball valve, the ninth ball valve is connected with the water outlet of the second circulating water pump, the water inlet of the second circulating water pump is connected with the tenth ball valve, the tenth ball valve is connected with the water outlet of the hot water tank, the water inlet of the hot water tank is connected with the eleventh ball valve, the eleventh ball valve is respectively connected with the eighth ball valve and the twelfth ball valve, and the twelfth ball valve is connected with the tap water inlet;
temperature measuring elements are respectively arranged on a first port and a second port of the phase change energy storage device, a plurality of temperature measuring elements are arranged in the phase change energy storage device, the arrangement points of the temperature measuring elements at least comprise the peripheries of the top, the middle and the bottom of a phase change material filling area in the phase change energy storage device, and at least 4 temperature measuring elements are uniformly arranged on each periphery;
the data acquisition device is connected with a temperature acquisition element, a flowmeter and a differential pressure sensor of the phase change energy storage device through a signal transmission line, and can continuously acquire temperature, flow and differential pressure data, the rest parts are connected through pipelines, and the medium in the pipelines is water;
the air-cooled radiator is provided with a plurality of adjusting gears, and different heat dissipation capacities can be realized.
The hot water tank is provided with an electric heater and a temperature controller, and the heating mode of the hot water tank is electric heating.
The outside of the pipeline is wrapped by a heat insulation material which is rubber and plastic.
A test method of a phase change energy storage device performance test system is adopted, and the phase change energy storage device performance test system is characterized in that: the heat storage working condition test can be realized by opening and closing different parts of the test system; the method for testing the heat storage working condition comprises the following steps:
closing the first ball valve, the first circulating water pump, the second ball valve, the air-cooled radiator, the thirteenth ball valve, the third ball valve, the fifth ball valve, the sixth ball valve, the fifteenth ball valve, the twelfth ball valve and the tap water port; starting an electric heater of the hot water tank, keeping the hot water tank at a set temperature, and then starting a tenth ball valve, a ninth ball valve, a seventh ball valve, a flowmeter, a fourteenth ball valve, a differential pressure sensor, a fourth ball valve, an eighth ball valve, an eleventh ball valve and a data acquisition device; finally, a second circulating water pump is started; the hot water sequentially passes through the tenth ball valve, the second circulating water pump, the ninth ball valve, the seventh ball valve, the flowmeter, the fourteenth ball valve, the phase change energy storage device, the fourth ball valve, the eighth ball valve, the eleventh ball valve and the hot water tank to form a heat storage cycle, and a heating source with stable temperature is provided for the phase change energy storage device;
the flow of the heat storage circulation is adjusted to a set flow by opening the ninth ball valve and the tenth ball valve; respectively measuring the flow of a heat storage cycle, the pressure loss between a first port and a second port of the phase change energy storage device and the temperatures of the first port, the second port and different positions in the phase change energy storage device through a flowmeter, a differential pressure sensor and a temperature measuring element, wherein the acquisition frequency is not less than 1 min/time; when the temperature difference between the first port and the second port is less than 5 ℃ or the lowest temperature measured by the temperature measuring element in the phase change energy storage device is 5 ℃ higher than the phase change temperature point of the phase change material, the heat storage working condition test is considered to be finished, and all parts are stopped to run.
A test method of a phase change energy storage device performance test system is adopted, and the phase change energy storage device performance test system is characterized in that: the heat release working condition test can be realized by opening and closing different parts of the test system; the method for testing the heat release working condition comprises the following steps:
closing the third ball valve, the fourth ball valve, the seventh ball valve, the fourteenth ball valve, the eighth ball valve, the ninth ball valve, the second circulating water pump, the tenth ball valve, the eleventh ball valve, the twelfth ball valve, the tap water inlet and the hot water tank; opening a first ball valve, a second ball valve, a thirteenth ball valve, a differential pressure sensor, a fifteenth ball valve, a flow meter, a sixth ball valve, a fifth ball valve, an air-cooled radiator and a data acquisition device, and finally opening a first circulating water pump; the cold water sequentially passes through the first ball valve and the first circulating water pump and then is divided into two paths, one path of cold water sequentially passes through the second ball valve, the phase change energy storage device, the fifteenth ball valve, the flowmeter, the sixth ball valve, the fifth ball valve, the air-cooled radiator and the cold water tank to form a heat release cycle and provide a heat absorption cold source with stable temperature for the phase change energy storage device, and the other path of cold water sequentially passes through the thirteenth ball valve, the air-cooled radiator and the cold water tank to form an internal heat dissipation cycle, so that the cold water is strengthened in heat dissipation, and the cold water tank is kept at a set temperature;
the total flow passing through the first circulating water pump is adjusted by opening different opening degrees of the first ball valve, and the flow of the heat release cycle is adjusted to a set flow by opening different opening degrees of the second ball valve and the thirteenth ball valve; the heat dissipation capacity of the air-cooled radiator is adjusted through the adjusted temperature of the air-conditioning room and the gear of the air-cooled radiator, the control of the inlet water temperature of the cold water tank is realized, and the water temperature of the cold water tank is adjusted to be kept at a set temperature; the flow of a heat release cycle, the pressure loss between a first port and a second port of the phase change energy storage device and the temperatures of the first port, the second port and different positions in the phase change energy storage device are respectively measured through a flowmeter, a differential pressure sensor and a temperature measuring element, and the acquisition frequency is not less than 1 min/time; when the temperature difference between the first port and the second port is less than 5 ℃, or the lowest temperature measured in the temperature measuring element inside the phase change energy storage device is reduced to 30 ℃, the heat release condition test can be considered to be finished.
A test method of a phase change energy storage device performance test system is adopted, and the phase change energy storage device performance test system is characterized in that: the actual working condition test can be realized by opening and closing different parts of the test system; the method for testing the actual working condition comprises the following steps:
closing the first ball valve, the first water circulating pump, the second ball valve, the thirteenth ball valve, the third ball valve, the fourteenth ball valve, the seventh ball valve, the ninth ball valve, the second water circulating pump, the tenth ball valve, the eleventh ball valve and the hot water tank; opening a twelfth ball valve, an eighth ball valve, a fourth ball valve, a differential pressure sensor, a fifteenth ball valve, a flow meter, a sixth ball valve, a fifth ball valve and a data acquisition device; opening a tap water port; cold water sequentially passes through a tap water inlet, a twelfth ball valve, an eighth ball valve, a fourth ball valve, a phase change energy storage device, a fifteenth ball valve, a flowmeter, a sixth ball valve, a fifth ball valve and an air-cooled radiator and finally flows into a cold water tank, so that tap water is heated from the phase change energy storage device and is heated into hot water;
the flow of tap water is adjusted to a set flow by opening different opening degrees of the twelfth ball valve; the flow of an actual working condition, the pressure loss between a first port and a second port of the phase change energy storage device and the temperatures of the first port, the second port and different positions in the phase change energy storage device are respectively measured through a flowmeter, a differential pressure sensor and a temperature measuring element, and the acquisition frequency is not less than 1 min/time; when the temperature of the second port drops to 40 ℃, the actual condition test may be considered to be finished.
Compared with the prior art, the invention has the beneficial effects that:
the performance test system of the phase change energy storage device can realize heat storage working condition test and heat release working condition test, obtain test data under different working conditions, can be used for performance test of medium and small-sized phase change energy storage devices, and can obtain heat storage characteristics, heat release characteristics, heat storage capacity and heat release capacity of the phase change energy storage device and heat loss during standing.
Furthermore, according to the testing method of the performance testing system of the phase change energy storage device, different testing functions can be realized by opening and closing different components of the testing system, the testing method is simple, the adjusting accuracy of different working conditions is high, and the testing method can be continued and stable. In the heat storage circulation, a hot water tank with a temperature controller is used as a constant temperature heat source of the phase change energy storage device. In the heat release circulation, the water temperature in the cold water tank is controlled by adopting a combined regulation and control mode of an air-conditioning room and a multi-gear air-cooled radiator, a local heat dissipation circulation and other modes, so that the temperature of the cold water tank is kept stable, and the cold water tank is used as a constant-temperature cold source of the phase change energy storage device. And the actual working condition test of tap water heating can be directly carried out, and the direct heat exchange of kitchen water or washing water is simulated.
Drawings
FIG. 1 is a schematic diagram of a system for testing performance of a phase change energy storage device according to the present invention;
FIG. 2 is a schematic diagram of the hot water tank filling function of a phase change energy storage device performance testing system of the present invention;
FIG. 3 is a schematic diagram of a cold water tank filling function of a phase change energy storage device performance testing system according to the present invention;
FIG. 4 is a schematic diagram of a heat storage condition test of a performance test system of a phase change energy storage device according to the present invention;
FIG. 5 is a schematic diagram of a heat release condition test of a phase change energy storage device performance test system according to the present invention;
FIG. 6 is a schematic diagram of an actual condition test of a performance test system of a phase change energy storage device according to the present invention;
FIG. 7 is a schematic diagram of a phase change energy storage device according to the present invention;
the system comprises an air-conditioning room 1, a cold water tank 2, a first ball valve 3, a first circulating water pump 4, a second ball valve 5, a third ball valve 6, a fourth ball valve 7, a fifth ball valve 8, a sixth ball valve 9, a flow meter 10, a seventh ball valve 11, an eighth ball valve 12, a ninth ball valve 13, a second circulating water pump 14, a tenth circulating water pump 15, an eleventh circulating water pump 16, a twelfth circulating water pump 17, a tap water inlet 18, an air-cooled radiator 19, an thirteenth ball valve 20, a phase-change energy storage device 21, a first port 2101, a second port 2102, a heat exchange coil 2103, a phase-change material 2104, a shell 2105, a differential pressure sensor 22, a fourteenth ball valve 23, a fifteenth ball valve 24, a data acquisition device 25 and a hot water tank 26.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The general concept of the invention is: a phase change energy storage device performance test system and a test method thereof can realize heat storage working condition test, heat release working condition test and actual working condition test by opening and closing different components of the test system, the regulation accuracy of each working condition is higher and can be continuously and stably, test data under different working conditions can be obtained, and the test method is simple.
For a detailed description of the technical contents and the construction and objects of the present invention, reference will now be made to the accompanying drawings.
As shown in fig. 1 to 7, the performance testing system for a phase change energy storage device of the present invention is characterized in that:
the utility model provides a phase change energy memory capability test system which characterized in that: the system comprises an air-conditioning room 1, a cold water tank 2, a first ball valve 3, a first circulating water pump 4, a second ball valve 5, a third ball valve 6, a fourth ball valve 7, a fifth ball valve 8, a sixth ball valve 9, a flow meter 10, a seventh ball valve 11, an eighth ball valve 12, a ninth ball valve 13, a second circulating water pump 14, a tenth ball valve 15, an eleventh ball valve 16, a twelfth ball valve 17, a tap water inlet 18, an air-cooled radiator 19, a thirteenth ball valve 20, a phase change energy storage device 21, a differential pressure sensor 22, a fourteenth ball valve 23, a fifteenth ball valve 24, a data acquisition device 25 and a hot water tank 26;
the phase change energy storage device 21 comprises a first port 2101, a second port 2102, a heat exchange coil 2103, a phase change material 2104 and a housing 2105, wherein the phase change temperature of the phase change material 2104 is 40-80 ℃;
the connection relationship of the test system is as follows: a first ball valve 3 is connected with a water outlet of the cold water tank 2, a first ball valve 3 is connected with a water inlet of a first circulating water pump 4, a second ball valve 5 and a thirteenth ball valve 20 are respectively connected with a water outlet of the first circulating water pump 4, the thirteenth ball valve 20 is connected with an air-cooled radiator 19, a third ball valve 6 and a fifth ball valve 8, the air-cooled radiator 19 is connected with a water inlet of the cold water tank 2, the third ball valve 6 is respectively connected with a fourth ball valve 7 and an eighth ball valve 12, the second ball valve 5 is respectively connected with the fourth ball valve 7 and a first port 2101 of the phase change energy storage device 21, a differential pressure sensor 22 is connected with the first port 2101 and a second port 2102 of the phase change energy storage device 21, a fourteenth ball valve 23 and a fifteenth ball valve 24 are respectively connected with a second port 2102 of the phase change energy storage device 21, the fourteenth ball valve 23 is respectively connected with a water outlet of a sixth ball valve 9 and a water outlet of a flow meter 10, the fifteenth ball valve 24 is respectively connected with the seventh ball valve 11 and the water inlet of the flowmeter 10, the sixth ball valve 9 and the seventh ball valve 11 are simultaneously respectively connected with the fifth ball valve 8 and the ninth ball valve 13, the ninth ball valve 13 is connected with the water outlet of the second circulating water pump 14, the water inlet of the second circulating water pump 14 is connected with the tenth ball valve 15, the tenth ball valve 15 is connected with the water outlet of the hot water tank 26, the water inlet of the hot water tank 26 is connected with the eleventh ball valve 16, the eleventh ball valve 16 is respectively connected with the eighth ball valve 12 and the twelfth ball valve 17, and the twelfth ball valve 17 is connected with the tap water inlet 18;
temperature measuring elements are respectively arranged at the first port 2101 and the second port 2102 of the phase change energy storage device 21, a plurality of temperature measuring elements are arranged in the phase change energy storage device 21, the arrangement points of the temperature measuring elements at least comprise the peripheries of the top, middle and bottom three sections of a phase change material filling area in the phase change energy storage device 21, and at least 4 temperature measuring elements are uniformly arranged on each periphery;
the data acquisition device 25 is connected with the temperature acquisition element of the phase change energy storage device 21, the flowmeter 10 and the differential pressure sensor 22 through signal transmission lines, can continuously acquire temperature, flow and differential pressure data, the connection modes of the rest parts are all connected through pipelines, and the medium in the pipelines is water;
the air-cooled radiator 19 has a plurality of adjustment gears, and can realize different heat dissipation capacities.
The hot water tank 26 is provided with an electric heater and a temperature controller, and the hot water tank 26 is heated by electricity.
The outside of the pipeline is wrapped by a heat insulation material which is rubber and plastic.
A test method of a phase change energy storage device performance test system is adopted, and the phase change energy storage device performance test system is characterized in that: by opening and closing different components of the test system, the functions that can be realized are as follows:
(1) running water fills the hot water tank 26
As shown in fig. 2, the method for filling the hot water tank 26 with tap water is as follows: and opening the eleventh ball valve 16, the twelfth ball valve 17 and the tap water port 18, closing other parts, and enabling cold water to sequentially flow into the hot water tank 26 through the tap water port 18, the twelfth ball valve 17 and the eleventh ball valve 16, so that the tap water can be filled into the hot water tank 26 and the water filling is stopped until the set liquid level is reached.
(2) The running water fills the cold water tank 2
As shown in fig. 3, the method for filling the cold water tank 2 with the tap water includes: and (3) opening the third ball valve 6, the eighth ball valve 12, the twelfth ball valve 17 and the tap water port 18, closing other parts, and allowing cold water to flow into the cold water tank 2 through the tap water port 18, the twelfth ball valve 17, the eighth ball valve 12, the third ball valve 6 and the air-cooled radiator 19 in sequence to fill the cold water tank 2 with tap water until the water level is set.
(3) Testing of Heat storage Condition
The main purposes of the heat storage working condition test are as follows: the phase change energy storage device 21 is tested for heat storage characteristics, heat storage amount, and heat loss during standing after heat storage is completed, and the heat storage characteristics include: the influence of different flow rates on the heat storage capacity of the phase change energy storage device 21 and the influence of different water inlet temperatures on the heat storage capacity of the phase change energy storage device 21.
As shown in fig. 4, the method for testing the heat storage condition is as follows: closing the first ball valve 3, the first circulating water pump 4, the second ball valve 5, the air-cooled radiator 19, the thirteenth ball valve 20, the third ball valve 6, the fifth ball valve 8, the sixth ball valve 9, the fifteenth ball valve 24, the twelfth ball valve 17 and the tap water port 18; turning on an electric heater of the hot water tank 26, keeping the hot water tank 26 at a set temperature, and then turning on a tenth ball valve 15, a ninth ball valve 13, a seventh ball valve 11, a flow meter 10, a fourteenth ball valve 23, a differential pressure sensor 22, a fourth ball valve 7, an eighth ball valve 12, an eleventh ball valve 16 and a data acquisition device 25; finally, the second circulating water pump 14 is started; the hot water sequentially passes through the tenth ball valve 15, the second circulating water pump 14, the ninth ball valve 13, the seventh ball valve 11, the flow meter 10, the fourteenth ball valve 23, the phase change energy storage device 21, the fourth ball valve 7, the eighth ball valve 12, the eleventh ball valve 16 and the hot water tank 26 to form a heat storage cycle, and a heating source with stable temperature is provided for the phase change energy storage device 21.
Wherein, the flow of the heat accumulation circulation is adjusted to the set flow by opening the ninth ball valve 13 and the tenth ball valve 15; the flow of a heat storage cycle, the pressure loss between the first port 2101 and the second port 2102 of the phase change energy storage device 21 and the temperatures of different positions inside the first port 2101, the second port 2102 and the phase change energy storage device 21 are respectively measured through the flowmeter 10, the differential pressure sensor 22 and the temperature measuring element, and the acquisition frequency is not less than 1 min/time; when the temperature difference between the first port 2101 and the second port 2102 is less than 5 ℃, or the lowest temperature measured by the temperature measuring element inside the phase change energy storage device 21 is 5 ℃ higher than the phase change temperature point of the phase change material 2104, it can be considered that the heat storage working condition test is finished, and all components are stopped.
(4) Testing of exothermic conditions
The main purposes of the heat release condition test are as follows: the phase change energy storage device 21 is tested for heat release characteristics, heat release amount, and heat release efficiency, the heat release characteristics including: the influence of different flow rates on the heat release capacity of the phase change energy storage device 21 and the influence of different water inlet temperatures on the heat release capacity of the phase change energy storage device 21.
As shown in FIG. 5, the method for testing the heat release condition is as follows: closing the third ball valve 6, the fourth ball valve 7, the seventh ball valve 11, the fourteenth ball valve 23, the eighth ball valve 12, the ninth ball valve 13, the second circulating water pump 14, the tenth ball valve 15, the eleventh ball valve 16, the twelfth ball valve 17, the tap water port 18 and the hot water tank 26; opening a first ball valve 3, a second ball valve 5, a thirteenth ball valve 20, a differential pressure sensor 22, a fifteenth ball valve 24, a flow meter 10, a sixth ball valve 9, a fifth ball valve 8, an air-cooled radiator 19 and a data acquisition device 25, and finally opening a first circulating water pump 4; the cold water is divided into two paths after sequentially passing through the first ball valve 3 and the first circulating water pump 4, one path of cold water sequentially passes through the second ball valve 5, the phase change energy storage device 21, the fifteenth ball valve 24, the flowmeter 10, the sixth ball valve 9, the fifth ball valve 8, the air cooling radiator 19 and the cold water tank 2 to form heat release circulation, a heat absorption cold source with stable temperature is provided for the phase change energy storage device 21, and the other path of cold water sequentially passes through the thirteenth ball valve 20, the air cooling radiator 19 and the cold water tank 2 to form internal heat dissipation circulation, strengthen cold water heat dissipation and keep the cold water tank 2 at a set temperature.
Wherein, the total flow passing through the first circulating water pump 4 is adjusted by opening different opening degrees of the first ball valve 3, and then the flow of the heat release cycle is adjusted to a set flow by opening different opening degrees of the second ball valve 5 and the thirteenth ball valve 20; the heat dissipation capacity of the air cooling radiator 19 is adjusted through the adjusted temperature of the air conditioning room 1 and the gear of the air cooling radiator 19, the control of the water inlet temperature of the cold water tank 2 is realized, and the water temperature of the cold water tank 2 is adjusted to be kept at a set temperature; the flow of a heat release cycle, the pressure loss between the first port 2101 and the second port 2102 of the phase change energy storage device 21 and the temperatures of different positions inside the first port 2101, the second port 2102 and the phase change energy storage device 21 are respectively measured by the flowmeter 10, the differential pressure sensor 22 and the temperature measuring element, and the acquisition frequency is not less than 1 min/time; when the temperature difference between the first port 2101 and the second port 2102 is less than 5 ℃, or the lowest temperature measured in the temperature measurement element inside the phase change energy storage device 21 is reduced to 30 ℃, the heat release condition test may be considered to be finished.
(5) Test of actual conditions
The main purposes of the actual working condition test are as follows: the practical use performance of the phase change energy storage device 21 is tested, tap water directly exchanges heat with the phase change energy storage device 21 through the tap water, and the tap water is heated into hot water which can be used as kitchen water and washing water.
As shown in fig. 6, the method for testing the actual working condition includes: closing the first ball valve 3, the first circulating water pump 4, the second ball valve 5, the thirteenth ball valve 20, the third ball valve 6, the fourteenth ball valve 23, the seventh ball valve 11, the ninth ball valve 13, the second circulating water pump 14, the tenth ball valve 15, the eleventh ball valve 16 and the hot water tank 26; opening a twelfth ball valve 17, an eighth ball valve 12, a fourth ball valve 7, a differential pressure sensor 22, a fifteenth ball valve 24, a flowmeter 10, a sixth ball valve 9, a fifth ball valve 8 and a data acquisition device 25; opening the tap water port 18; cold water sequentially passes through a tap water inlet 18, a twelfth ball valve 17, an eighth ball valve 12, a fourth ball valve 7, a phase change energy storage device 21, a fifteenth ball valve 24, a flowmeter 10, a sixth ball valve 9, a fifth ball valve 8 and an air-cooled radiator 19 and finally flows into the cold water tank 2, so that tap water is heated from the phase change energy storage device 21 to be heated into hot water.
Wherein, the tap water flow is adjusted to the set flow by opening different opening degrees of the twelfth ball valve 17; the flow of an actual working condition, the pressure loss between the first port 2101 and the second port 2102 of the phase change energy storage device 21 and the temperatures of different positions inside the first port 2101, the second port 2102 and the phase change energy storage device 21 are respectively measured through the flowmeter 10, the differential pressure sensor 22 and the temperature measuring element, and the acquisition frequency is not less than 1 min/time; the end of the actual condition test may be considered when the temperature of the second port 2102 drops to 40 ℃.
Claims (6)
1. The utility model provides a phase change energy memory capability test system which characterized in that: the air-cooled water heater comprises an air-conditioning room (1), a cold water tank (2), a first ball valve (3), a first circulating water pump (4), a second ball valve (5), a third ball valve (6), a fourth ball valve (7), a fifth ball valve (8), a sixth ball valve (9), a flow meter (10), a seventh ball valve (11), an eighth ball valve (12), a ninth ball valve (13), a second circulating water pump (14), a tenth ball valve (15), an eleventh ball valve (16), a twelfth ball valve (17), a tap water inlet (18), an air-cooled radiator (19), a thirteenth ball valve (20), a phase-change energy storage device (21), a differential pressure sensor (22), a fourteenth ball valve (23), a fifteenth ball valve (24), a data acquisition device (25) and a hot water tank (26);
the phase change energy storage device (21) comprises a first port (2101), a second port (2102), a heat exchange coil (2103), a phase change material (2104) and a shell (2105), wherein the phase change temperature of the phase change material (2104) is 40-80 ℃;
the connection relationship of the test system is as follows: the water outlet of the cold water tank (2) is connected with a first ball valve (3), the first ball valve (3) is connected with the water inlet of a first circulating water pump (4), the water outlet of the first circulating water pump (4) is respectively connected with a second ball valve (5) and a thirteenth ball valve (20), the thirteenth ball valve (20) is connected with an air-cooled radiator (19), a third ball valve (6) and a fifth ball valve (8), the air-cooled radiator (19) is connected with the water inlet of the cold water tank (2), the third ball valve (6) is respectively connected with a fourth ball valve (7) and an eighth ball valve (12), the second ball valve (5) is respectively connected with a fourth ball valve (7) and a first port (2101) of a phase-change energy storage device (21), a differential pressure sensor (22) is connected with a first port (2101) and a second port (2102) of the phase-change energy storage device (21), and a second port (2102) of the phase-change energy storage device (21) is respectively connected with a fourteenth ball valve (23) and a fifteenth ball valve (24), the fourteenth ball valve (23) is respectively connected with water outlets of a sixth ball valve (9) and a flowmeter (10), the fifteenth ball valve (24) is respectively connected with water inlets of a seventh ball valve (11) and a flowmeter (10), the sixth ball valve (9) and the seventh ball valve (11) are simultaneously and respectively connected with a fifth ball valve (8) and a ninth ball valve (13), the ninth ball valve (13) is connected with a water outlet of a second circulating water pump (14), a water inlet of the second circulating water pump (14) is connected with a tenth ball valve (15), the tenth ball valve (15) is connected with a water outlet of a hot water tank (26), a water inlet of the hot water tank (26) is connected with an eleventh ball valve (16), the eleventh ball valve (16) is connected with an eighth ball valve (12) and a twelfth ball valve (17), and the twelfth ball valve (17) is connected with a tap water inlet (18);
temperature measuring elements are respectively arranged at the first port (2101) and the second port (2102) of the phase change energy storage device (21), a plurality of temperature measuring elements are arranged inside the phase change energy storage device (21), the arrangement points of the temperature measuring elements at least comprise the peripheries of the top section, the middle section and the bottom section of a phase change material filling area inside the phase change energy storage device (21), and at least 4 temperature measuring elements are uniformly arranged on each periphery;
the data acquisition device (25) is connected with a temperature acquisition element of the phase change energy storage device (21), the flowmeter (10) and the differential pressure sensor (22) through signal transmission lines, temperature, flow and differential pressure data can be continuously acquired, the connection modes of the rest parts are all connected through pipelines, and the medium in the pipelines is water;
the air-cooled radiator (19) is provided with a plurality of adjusting gears, and different heat dissipation capacities can be realized;
by opening and closing different parts of the test system, the heat storage working condition test and the heat release working condition test can be realized, and the actual working condition test can be realized;
when the heat release working condition is tested, cold water sequentially passes through a first ball valve (3) and a first circulating water pump (4) and then is divided into two paths, one path of cold water sequentially passes through a second ball valve (5), a phase change energy storage device (21), a fifteenth ball valve (24), a flowmeter (10), a sixth ball valve (9), a fifth ball valve (8), an air-cooled radiator (19) and a cold water tank (2) to form heat release circulation, a heat absorption cold source with stable temperature is provided for the phase change energy storage device (21), and the other path of cold water sequentially passes through a thirteenth ball valve (20), the air-cooled radiator (19) and the cold water tank (2) to form internal heat dissipation circulation, strengthen cold water heat dissipation and keep the cold water tank (2) at a set temperature; the heat dissipation capacity of the air cooling radiator (19) is adjusted by adjusting the temperature of the air conditioning room (1) and the gear of the air cooling radiator (19), the water inlet temperature of the cold water tank (2) is controlled, and the water temperature of the cold water tank (2) is adjusted to be kept at a set temperature.
2. The system for testing the performance of the phase-change energy storage device according to claim 1, wherein: the hot water tank (26) is provided with an electric heater and a temperature controller, and the heating mode of the hot water tank (26) is electric heating.
3. The system for testing the performance of the phase-change energy storage device according to claim 1, wherein: the outside of the pipeline is wrapped by a heat insulation material which is rubber and plastic.
4. A testing method of a performance testing system of a phase change energy storage device, which adopts the performance testing system of the phase change energy storage device of any one of claims 1 to 3, and is characterized in that: the heat storage working condition test can be realized by opening and closing different parts of the test system; the method for testing the heat storage working condition comprises the following steps:
closing a first ball valve (3), a first circulating water pump (4), a second ball valve (5), an air-cooled radiator (19), a thirteenth ball valve (20), a third ball valve (6), a fifth ball valve (8), a sixth ball valve (9), a fifteenth ball valve (24), a twelfth ball valve (17) and a tap water port (18); the method comprises the steps that a hot water tank (26) is opened and kept at a set temperature, and then a tenth ball valve (15), a ninth ball valve (13), a seventh ball valve (11), a flow meter (10), a fourteenth ball valve (23), a differential pressure sensor (22), a fourth ball valve (7), an eighth ball valve (12), an eleventh ball valve (16) and a data acquisition device (25) are opened; finally, the second circulating water pump (14) is started; the hot water sequentially passes through a tenth ball valve (15), a second circulating water pump (14), a ninth ball valve (13), a seventh ball valve (11), a flowmeter (10), a fourteenth ball valve (23), a phase change energy storage device (21), a fourth ball valve (7), an eighth ball valve (12), an eleventh ball valve (16) and a hot water tank (26) to form a heat storage cycle, and a heating heat source with stable temperature is provided for the phase change energy storage device (21);
the flow of the heat accumulation circulation is adjusted to a set flow by opening a ninth ball valve (13) and a tenth ball valve (15); the flow of a heat storage cycle, the pressure loss between a first port (2101) and a second port (2102) of the phase change energy storage device (21) and the temperatures of different positions inside the first port (2101), the second port (2102) and the phase change energy storage device (21) are respectively measured through a flowmeter (10), a differential pressure sensor (22) and a temperature measuring element, and the acquisition frequency is not less than 1 min/time; when the temperature difference between the first port (2101) and the second port (2102) is less than 5 ℃, or the lowest temperature measured in the internal temperature measuring element of the phase change energy storage device (21) is 5 ℃ higher than the phase change temperature point of the phase change material (2104), the heat storage working condition test is considered to be finished, and all components are stopped to run.
5. A testing method of a performance testing system of a phase change energy storage device, which adopts the performance testing system of the phase change energy storage device of any one of claims 1 to 3, and is characterized in that: the heat release working condition test can be realized by opening and closing different parts of the test system; the method for testing the heat release working condition comprises the following steps:
closing a third ball valve (6), a fourth ball valve (7), a seventh ball valve (11), a fourteenth ball valve (23), an eighth ball valve (12), a ninth ball valve (13), a second circulating water pump (14), a tenth ball valve (15), an eleventh ball valve (16), a twelfth ball valve (17), a tap water port (18) and a hot water tank (26); opening a first ball valve (3), a second ball valve (5), a thirteenth ball valve (20), a differential pressure sensor (22), a fifteenth ball valve (24), a flow meter (10), a sixth ball valve (9), a fifth ball valve (8), an air-cooled radiator (19) and a data acquisition device (25), and finally opening a first circulating water pump (4); cold water sequentially passes through the first ball valve (3) and the first circulating water pump (4) and then is divided into two paths, one path of cold water sequentially passes through the second ball valve (5), the phase change energy storage device (21), the fifteenth ball valve (24), the flowmeter (10), the sixth ball valve (9), the fifth ball valve (8), the air-cooled radiator (19) and the cold water tank (2) to form heat release circulation, a heat absorption cold source with stable temperature is provided for the phase change energy storage device (21), and the other path of cold water sequentially passes through the thirteenth ball valve (20), the air-cooled radiator (19) and the cold water tank (2) to form internal heat dissipation circulation, so that cold water heat dissipation is strengthened, and the cold water tank (2) is kept at a set temperature;
the total flow passing through the first circulating water pump (4) is adjusted by opening different opening degrees of the first ball valve (3), and the flow of the heat release cycle is adjusted to a set flow by opening different opening degrees of the second ball valve (5) and the thirteenth ball valve (20); the heat dissipation capacity of the air-cooled radiator (19) is adjusted through the adjusted temperature of the air-conditioned room (1) and the gear of the air-cooled radiator (19), the control of the water inlet temperature of the cold water tank (2) is realized, and the water temperature of the cold water tank (2) is adjusted to be kept at a set temperature; the flow of a heat release cycle, the pressure loss between a first port (2101) and a second port (2102) of the phase change energy storage device (21) and the temperatures of different positions inside the first port (2101), the second port (2102) and the phase change energy storage device (21) are respectively measured through a flowmeter (10), a differential pressure sensor (22) and a temperature measuring element, and the acquisition frequency is not less than 1 min/time; when the temperature difference between the first port (2101) and the second port (2102) is less than 5 ℃, or the lowest temperature measured in the temperature measuring element inside the phase change energy storage device (21) is reduced to 30 ℃, the heat release condition test can be considered to be finished.
6. A testing method of a performance testing system of a phase change energy storage device, which adopts the performance testing system of the phase change energy storage device of any one of claims 1 to 3, and is characterized in that: the actual working condition test can be realized by opening and closing different parts of the test system; the method for testing the actual working condition comprises the following steps:
closing a first ball valve (3), a first circulating water pump (4), a second ball valve (5), a thirteenth ball valve (20), a third ball valve (6), a fourteenth ball valve (23), a seventh ball valve (11), a ninth ball valve (13), a second circulating water pump (14), a tenth ball valve (15), an eleventh ball valve (16) and a hot water tank (26); opening a twelfth ball valve (17), an eighth ball valve (12), a fourth ball valve (7), a differential pressure sensor (22), a fifteenth ball valve (24), a flowmeter (10), a sixth ball valve (9), a fifth ball valve (8) and a data acquisition device (25); opening a tap water port (18); cold water sequentially passes through a tap water inlet (18), a twelfth ball valve (17), an eighth ball valve (12), a fourth ball valve (7), a phase change energy storage device (21), a fifteenth ball valve (24), a flowmeter (10), a sixth ball valve (9), a fifth ball valve (8) and an air cooling radiator (19) and finally flows into the cold water tank (2), so that tap water is heated from the phase change energy storage device (21) and is heated into hot water;
wherein, the tap water flow is adjusted to the set flow by opening different opening degrees of the twelfth ball valve (17); the flow of an actual working condition, the pressure loss between a first port (2101) and a second port (2102) of the phase change energy storage device (21) and the temperatures of different positions inside the first port (2101), the second port (2102) and the phase change energy storage device (21) are respectively measured through a flowmeter (10), a differential pressure sensor (22) and a temperature measuring element, and the acquisition frequency is not less than 1 min/time; when the temperature of the second port (2102) drops to 40 ℃, the end of the duty test may be considered.
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