CN111413124B - Cold and hot water heat pump and heat source tower heat pump low-cost test bench of wide operating mode operation - Google Patents
Cold and hot water heat pump and heat source tower heat pump low-cost test bench of wide operating mode operation Download PDFInfo
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- CN111413124B CN111413124B CN202010248507.4A CN202010248507A CN111413124B CN 111413124 B CN111413124 B CN 111413124B CN 202010248507 A CN202010248507 A CN 202010248507A CN 111413124 B CN111413124 B CN 111413124B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 200
- 238000012360 testing method Methods 0.000 title claims abstract description 73
- 238000004378 air conditioning Methods 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000011160 research Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000011056 performance test Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 10
- 238000005057 refrigeration Methods 0.000 description 8
- 239000000945 filler Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 238000007710 freezing Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
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Abstract
本发明涉及一种宽工况运行的冷热水热泵和热源塔热泵低成本试验台，包括冷热量供给系统、机组试验系统以及中间管路阀件系统三部分。其中冷热量供给系统包括工况机、热水箱、冷水箱、冷却塔。机组试验系统包括空调箱、冷侧换热器、热侧换热器、膨胀水箱、电动阀、流量计、水泵。中间管路阀件系统包括蝶阀、水泵。本实验台可实现热源塔热泵一体机和冷热水热泵机组产品在高低温不同工况和冷热量情况下的性能测试以及科研研究。本实验台有效利用被测机冷源，降低工况机能耗，达到节能效果。本实验台优设优配工况机，达到多工况、低成本效果。本实验台填补了本技术领域现有技术的空白。
The invention relates to a low-cost test bench for cold and hot water heat pumps and heat source tower heat pumps operating under wide working conditions, comprising three parts: a cold and heat supply system, a unit test system and an intermediate pipeline valve system. The cold and heat supply system includes working condition machine, hot water tank, cold water tank and cooling tower. The unit test system includes air conditioning box, cold side heat exchanger, hot side heat exchanger, expansion water tank, electric valve, flow meter, and water pump. The intermediate pipeline valve system includes butterfly valve and water pump. This test bench can realize the performance test and scientific research of the heat source tower heat pump integrated machine and the cold and hot water heat pump unit products under different working conditions of high and low temperature and cold and heat conditions. This test bench effectively utilizes the cold source of the machine under test, reduces the energy consumption of the machine under working conditions, and achieves the effect of energy saving. This test bench is optimally equipped with a machine with optimal working conditions to achieve the effect of multiple working conditions and low cost. This experimental bench fills the blank of the prior art in this technical field.
Description
Technical Field
The invention relates to a dual-purpose detection device for a heat source tower and a cold and hot water heat pump unit, in particular to a cold and hot water heat pump and heat source tower heat pump unit energy-saving test bed which is low in cost and suitable for both high and low temperature working conditions.
Background
The existing central air-conditioning cold and heat source systems have respective advantages and defects: the water-ground source heat pump gives consideration to cooling and heating, has high efficiency, is limited by geographical conditions, has high initial investment, is lengthened along with the running time, is easy to generate the phenomenon of unbalanced cooling and heating quantity and influences heat exchange; the water chilling unit and the boiler have high cooling efficiency and compact structure, but the utilization rate of boiler heating energy is low; the air source heat pump has a small and exquisite structure, can supply cold and heat, but has low cold supply efficiency in summer and is easy to frost in winter; the heat source tower heat pump system has the advantages that the heat source tower heat pump system is not different from a traditional water chilling unit in summer working conditions, the cooling efficiency is high, under the working conditions in winter, a circulating working medium in the system becomes an anti-freezing solution, heat is taken from outdoor air in a low-temperature environment by means of a low freezing point of the solution, the problem that an air source heat pump is prone to frosting is avoided, the heat source tower and a cooling tower are the same device, and initial investment is reduced.
In recent years, heat source tower heat pump unit products are applied and popularized, detection needs to be performed on the aspects of refrigeration performance, heating performance, host performance and unit quality so as to control the unit quality, quality and cost, and research and optimization needs to be continuously performed on the aspects, such as refrigerating fluid components, splashing, filler material and filler arrangement, and the like, so that a heat source tower heat pump unit test bed is urgently needed, and even the test bed is energy-saving, efficient and multifunctional. The prior art does not provide a reliable and quality solution.
Disclosure of Invention
In order to solve the technical problems, the invention aims to solve the problems of a platform required by detection of a heat source tower heat pump unit product in the aspects of refrigeration performance, heating performance, host performance and unit quality, continue scientific research and optimize the required platform in the aspects of refrigerating fluid components, floating, filler material, filler arrangement and the like, and solve the problems of dual-purpose detection and the required platform of a heat source tower and a cold and hot water heat pump unit, and the experimental platform has the functions of high efficiency, energy conservation and suitability for high and low temperature working conditions.
The technical scheme of the invention is as follows:
the utility model provides a cold and hot water heat pump of wide operating mode and heat source tower heat pump low-cost test bench which characterized in that:
the test bed comprises a cold and heat supply system (88), a unit test system (76) and a middle pipeline valve system for connecting the cold and heat supply system and the unit test system;
the cold and heat supply system (88) comprises a first working condition machine (81), a hot water tank (13), a cooling tower (9), a cold water tank (26) and a second working condition machine (80);
wherein the hot water tank (13) is connected with a first condenser (15) of the first working condition (81) machine through a first butterfly valve (14)/a second butterfly valve (16) and a first water pump (17); is connected with the cooling tower (9) through a third butterfly valve (11) and a second water pump (10)/a fourth butterfly valve (12); is connected with a second working condition machine (80) through a fifth butterfly valve (77) and a third water pump (79)/a sixth butterfly valve (78); the cold water tank (26) is connected with an evaporator (18) of the first working condition machine (81) through a seventh butterfly valve (20) and a fourth water pump (19)/eighth butterfly valve (22);
the unit test system (76) comprises an air conditioning box (82), a test space (8), a hot side heat exchanger (53), a cold side heat exchanger (69), a first expansion water tank (58), a second expansion water tank (86) and a pipeline electric heater (73);
wherein the air conditioning box (82) is connected with the hot side heat exchanger (53) through a ninth butterfly valve (54) and a tenth butterfly valve (55), is connected with the cold side heat exchanger (69) through an eleventh butterfly valve (62) and a twelfth butterfly valve (63)/a thirteenth butterfly valve (66), and is connected with the pipeline electric heater (73) through a fourteenth butterfly valve (75); the hot side heat exchanger (53) is connected with a tested machine through a fourteenth butterfly valve (75);
the cold-side heat exchanger (69) is connected with a tested machine through a fifteenth butterfly valve (64), a first flow meter (87), a fifth water pump (65)/a sixteenth butterfly valve (67), a second flow meter (85) and a sixth water pump (68); the pipeline electric heater (73) is connected with the tested machine through a seventeenth butterfly valve (72);
the middle pipeline valve system comprises a seventh water pump (25) and an eighteenth butterfly valve (30)/a nineteenth butterfly valve (32);
the second working condition machine (80) comprises a second condenser (100), an oil component (92), a compressor (90), an air component (91), a direct expansion type cooler (4), a first expansion valve (95) and a second expansion valve (96) which are connected in parallel, a first electromagnetic valve (93) and a second electromagnetic valve (94) which are connected to the first expansion valve (95) and the second expansion valve (96), a drying filter (97), a stop valve (98) and a liquid storage device (99), wherein the second condenser (100), the oil component (92), the compressor (90), the air component (91), the direct expansion type cooler (4), the first expansion valve (95) and the second expansion valve (96) are connected in sequence to form a loop; the second condenser (100) is connected with the third water pump (79) and a sixth butterfly valve (78).
Further, the cold and heat supply system (88) is directly connected with the unit test system (76) through a pipeline.
Further, the cold water tank (26) is connected with a seventh water pump (25) through a twentieth butterfly valve (24) and is connected with a nineteenth butterfly valve (32) through a twenty-first butterfly valve (27);
furthermore, a first expansion water tank (58) and a twenty-second butterfly valve (60) are installed on a first hot water inlet pipeline of the unit test system (76), and a second expansion water tank (86) is installed on a third cold water inlet pipeline; the hot side heat exchanger (53) is connected with a first electric valve (56) in parallel, the cold side heat exchanger (69) is connected with a second electric valve (61) in parallel, a third electric valve (59) and a first water pressure difference meter (57) are connected between the hot water outlet first pipeline and the hot water inlet first pipeline, and a fourth electric valve (74) and a second water pressure difference meter (70) are connected between the cold water outlet third pipeline and the cold water inlet third pipeline.
Furthermore, the air conditioning box (82) comprises a filter (1), an air conditioning finned tube cooler (2), a first adjustable heater (3), a straight expansion type cooler (4), a second adjustable heater (5), an electric humidifier (6) and a fine adjustment heater (7) which are connected in sequence. A tenth butterfly valve (55) and a twelfth butterfly valve (63) are connected with the air-conditioning finned tube cooler (2), and a thirteenth butterfly valve (66) and a fourteenth butterfly valve (75) are connected with the air-conditioning finned tube cooler (2).
In the preferred scheme of the invention, the cold and heat supply system is connected with the unit test system through the intermediate pipeline valve system on one hand and is directly connected with the unit test system through the pipeline on the other hand.
In the preferred scheme of the invention, the cold water tank is connected with the seventh water pump through a twentieth butterfly valve and is connected with a nineteenth butterfly valve through a twenty-first butterfly valve; the second working condition machine is directly connected with the unit test system through a pipeline.
In the preferred scheme of the invention, a first expansion water tank and a twenty-second butterfly valve are installed on a hot water inlet 1 pipeline of a unit test system, a second expansion water tank and a twenty-third butterfly valve are installed on a cold water inlet 3 pipeline, a hot side heat exchanger is connected in parallel with a first electric valve, a cold side heat exchanger is connected in parallel with a second electric valve, a third electric valve, a first water pressure difference meter and a fourth electric valve and a second water pressure difference meter are connected between a hot water outlet 1 pipeline and the hot water inlet 1 pipeline, and a cold water outlet 3 pipeline and a cold water inlet 3 pipeline.
In the preferred scheme of the invention, the air-conditioning box comprises a filter, an air-conditioning finned tube cooler, a first adjustable heater, a direct expansion type cooler, a second adjustable heater, an electric humidifying device and a fine adjustment heater, wherein a tenth butterfly valve and a twelfth butterfly valve are connected with the air-conditioning finned tube cooler, and a thirteenth butterfly valve and a fourteenth butterfly valve are connected with the air-conditioning finned tube cooler.
In the preferred scheme of the invention, the test space is supplied with air from the side and returned with air from the top, but the test space is not limited to the air returning mode; all butterfly valves and stop valves are used for stopping the on-off of fluid media, but are not limited to the valves; the cold side heat exchanger and the hot side heat exchanger are plate heat exchangers, but are not limited to the heat exchangers; the fifth water pump and the sixth water pump are frequency conversion water pumps, and the first water pump, the second water pump, the third water pump and the fourth water pump are fixed-frequency water pumps, but are not limited to fixed-frequency water pumps.
In the preferred embodiment of the present invention, the device 9 is a cooling tower, but not limited to a cooling tower, and may also be a heat source tower or the like that can provide a cooling source.
In a preferred embodiment of the present invention, the first operating machine is a variable frequency screw type machine, but is not limited to a variable frequency type machine and a screw type machine, and may also be a scroll type machine, a fixed frequency type machine or a similar machine capable of compressing gas, increasing gas pressure or delivering gas.
In a preferred embodiment of the present invention, the second operating mechanism is a piston type, but not limited to a screw type, and may also be a scroll type or similar device capable of compressing, increasing the pressure of or delivering gas.
In a preferred embodiment of the present invention, the expansion valve in the second operating mode machine is an electronic expansion valve, but is not limited to an electronic expansion valve, and may also be a thermal expansion valve or similar device capable of performing a throttling function.
In the preferred scheme of the invention, the expansion valve in the second working condition machine is connected in parallel with two paths, namely a high-temperature-level expansion valve and a low-temperature-level expansion valve, and is respectively provided with an electromagnetic valve, wherein the former is responsible for throttling under the high-temperature working condition, and the latter is responsible for throttling under the low-temperature-level working condition.
In the preferred scheme of the invention, the second working condition machine can be composed of one piston type machine set or a plurality of machine sets connected in parallel.
In the preferred scheme of the invention, the direct expansion type cooler can also be called as an evaporator, is a fin type, and can also be other equipment capable of outputting cold energy outwards.
By the scheme, the invention at least has the following advantages:
1. the invention can provide a platform for detection, scientific research and optimization of heat source tower heat pump unit products in the aspects of refrigeration performance, heating performance, host performance and unit quality.
2. The invention can provide a detection platform for the research and optimization of heat source tower heat pump unit products in aspects of refrigerating fluid components, splashing, filler material, filler arrangement and the like.
3. The invention can realize the performance detection of the heat source tower heat pump unit and the cold and hot water heat pump unit, and provides a test and scientific research platform for the good coupling of the cold and hot water heat pump host of the heat source tower heat pump unit and the heat source tower.
4. When the cooling working condition of the heat source tower heat pump tested machine is tested, a part of cold water of the tested machine is introduced to exchange heat with the inlet air in the air-conditioning finned tube cooler, so that the temperature of the cold water is increased, the temperature of the inlet air is reduced, the cold source of the tested machine is effectively utilized, the investment of a direct expansion type cooler is reduced, the energy consumption, the investment and the operation cost of a test bed are reduced, and the overall energy efficiency of the test bed is improved.
5. When the tested machine heating condition of the heat source tower heat pump is tested, a part of hot water of the tested machine is introduced to exchange heat with the inlet air in the air-conditioning finned tube cooler, so that the temperature of the hot water is reduced, the temperature of the inlet air is increased, the freezing and frost cracking phenomena of the air-conditioning finned tube cooler at low ambient temperature are avoided, the heat source of the tested machine is effectively utilized, the electric heating operation energy consumption of an air-conditioning box is reduced, the operation energy consumption of a cold and heat supply system is reduced, the energy consumption and the operation cost of a test bed are reduced, and the overall energy efficiency and the safety quality of the test bed are improved.
6. The invention can meet the requirements of high-temperature test working condition and low-temperature test working condition for the second working condition machine by using the piston compressor and the grading electronic expansion valve, is flexible to use, and greatly saves the cost compared with the traditional design of separating the high-temperature and low-temperature working condition machine set.
7. In conclusion, the invention fills the blank of the prior art in the aspect of heat source tower heat pump detection.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate a certain embodiment of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a low-cost test bed for a cold-hot water heat pump and a heat source tower heat pump operated under wide working conditions.
Fig. 2 is a schematic diagram of a cold and heat supply system for a test stand.
FIG. 3 is a schematic diagram of an experimental system of the test bed set.
FIG. 4 is a second operating mode schematic.
In the figure: a filter-1, an air-conditioning finned tube cooler-2, a first adjustable heater-3, a direct expansion type cooler-4, a second adjustable heater-5, an electric humidifier-6, a fine adjustment heater-7, a test space-8, a cooling tower-9, a second water pump-10, a third butterfly valve-11, a fourth butterfly valve-12, a hot water tank-13, a first butterfly valve-14, a first condenser-15, a second butterfly valve-16, a first water pump-17, an evaporator-18, a fourth water pump-19, a seventh butterfly valve-20, an eighth butterfly valve-22, a twentieth butterfly valve-24, a seventh water pump-25, a cold water tank-26, a twenty first hot side-27, an eighteenth butterfly valve-30, a nineteenth butterfly valve-32, a heat exchanger-53, A ninth butterfly valve-54, a tenth butterfly valve-55, a first electric valve-56, a first water pressure difference meter-57, a first expansion water tank-58, a third electric valve-59, a twenty-second butterfly valve-60, a second electric valve-61, an eleventh butterfly valve-62, a twelfth butterfly valve-63, a fifteenth butterfly valve-64, a fifth water pump-65, a thirteenth butterfly valve-66, a sixteenth butterfly valve-67, a sixth water pump-68, a cold side heat exchanger-69, a second water pressure difference meter-70, a twenty-third butterfly valve-71, a seventeenth butterfly valve-72, a pipeline electric heater-73, a fourth electric valve-74, a fourteenth butterfly valve-75, a unit test system-76, a fifth butterfly valve-77, a sixth butterfly valve-78, a third water pump-79, a first water pressure difference meter-57, a first expansion water tank-58, a second electric valve-67, a sixteenth butterfly valve-67, a sixth butterfly valve-75, a unit test system-76, a fifth butterfly valve-77, a sixth butterfly valve-78, a third water pump, a second electric valve, a sixth butterfly valve, a second electric valve, a fourth water pump, a sixth butterfly valve, a fourth water pump, a sixth butterfly valve, a fourth butterfly valve, a sixth butterfly valve, a fourth water pump, a sixth valve, a fourth water pump, a sixth butterfly valve, a fourth water pump, a fourth water pump, a sixth valve, a fourth water pump, a water, The air conditioner comprises a second working condition machine-80, a first working condition machine-81, an air conditioning box-82, a second flow meter-85, a second expansion water tank-86, a first flow meter-87, a cold and heat supply system-88, a compressor-90, an air separator-91, an oil separator-92, a first electromagnetic valve-93, a second electromagnetic valve-94, a first expansion valve-95, a second expansion valve-96, a drying filter-97, a first stop valve 98, a liquid reservoir-99, a second condenser-100 and a first stop valve 98.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The invention discloses a cold-hot water heat pump and heat source tower heat pump unit energy-saving test bed with low cost and high and low temperature working conditions, which is shown in a schematic diagram of fig. 1 and comprises a cold-hot water supply system 88, a unit test system 76 and an intermediate pipeline valve system. The cold and heat supply system 88 comprises a first working condition machine 81, a hot water tank 13, a cooling tower 9, a cold water tank 26 and a second working condition machine 80; the unit test system 76 comprises an air conditioning box 82, a test space 8, a hot side heat exchanger 53, a cold side heat exchanger 69, a first expansion water tank 58, a second expansion water tank 86 and a pipeline electric heater 73; the intermediate pipeline valve system comprises a seventh water pump 25, an eighteenth butterfly valve 30 and a nineteenth butterfly valve 32.
The specific connection method of the present invention is as follows.
As shown in fig. 3, the air conditioning cabinet 82 includes a filter 1, an air conditioning finned tube cooler 2, a first adjustable heater 3, a vertical expansion cooler 4, a second adjustable heater 5, an electric humidifier 6, and a trimmer heater 7.
The first operation device 81 includes the first condenser 15 and the evaporator 18 as shown in fig. 2.
As shown in fig. 1, 2 and 3, the cold and heat supply system 88 is connected to the unit test system 76 through an intermediate piping valve system, and is directly connected to the unit test system 76 through a pipe. Wherein, the cold water tank 26 is connected with the seventh water pump 25 through a twentieth butterfly valve 24, and is connected with a nineteenth butterfly valve 32 through a twenty-first butterfly valve 24; the hot side heat exchanger 53 is connected with the seventh water pump 25 through an eighteenth butterfly valve 30 and directly connected with a nineteenth butterfly valve 32 through a pipeline; the second working condition machine 80 is directly connected with the direct expansion type cooler 4 through a pipeline;
as shown in fig. 2, the hot water tank 13 is connected to the first condenser 15 through a first butterfly valve 14, a second butterfly valve 16, a first water pump 17, connected to the cooling tower 9 through a third butterfly valve 11, a second water pump 10, a fourth butterfly valve 12, and connected to the second operation machine 80 through a fifth butterfly valve 77, a sixth butterfly valve 78, and a third water pump 79; the cold water tank 26 is connected to the evaporator 18 through a seventh butterfly valve 20, an eighth butterfly valve 22, and a fourth water pump 19.
As shown in fig. 3, the air conditioning finned tube cooler 2 is connected to a hot side heat exchanger 53 through a ninth butterfly valve 54 and a tenth butterfly valve 55, to a cold side heat exchanger 69 through an eleventh butterfly valve 62, a twelfth butterfly valve 63 and a thirteenth butterfly valve 66, and to a tubular electric heater 73 through a fourteenth butterfly valve 75; the hot side heat exchanger 53 is connected with the tested machine through a fourteenth butterfly valve 52; the cold-side heat exchanger 69 is connected with the tested machine through a fifteenth butterfly valve 64, a sixteenth butterfly valve 67, a fifth water pump 65, a sixth water pump 68, a first flow meter 86 and a second flow meter 85; the pipeline electric heater 73 is connected with the tested machine through a seventeenth butterfly valve 72; the hot water inlet first pipeline is provided with a first expansion water tank 58 and a twenty-second butterfly valve 60, the cold water inlet third pipeline is provided with a second expansion water tank 86 and a twenty-third butterfly valve 71, the hot side heat exchanger is connected with a first electric valve 56 in parallel, the cold side heat exchanger is connected with a second electric valve 61 in parallel, a third electric valve 59 and a first water pressure difference meter 57 are connected between the hot water outlet first pipeline and the hot water inlet first pipeline, and a fourth electric valve 74 and a second water pressure difference meter 70 are connected between the cold water outlet third pipeline and the cold water inlet third pipeline.
As shown in fig. 4, the high-temperature and high-pressure gaseous refrigerant from the compressor 90 is separated by the oil component 92, enters the second condenser 100 to exchange heat with the constant-temperature water from the hot water tank 13, enters the reservoir 99, enters the first solenoid valve 93 (the second solenoid valve 94), enters the first expansion valve 95 (the second expansion valve 96) for throttling, enters the direct expansion type cooler 4 to exchange heat with the intake air in the air conditioning box, enters the air component 91 to be subjected to gas-liquid separation, and enters the compressor 90 for compression, thereby forming a cycle. The sixth butterfly valve 78 and the third water pump 79 are connected to a second condenser 100 in the second working machine 80.
The cold and hot water heat pump and heat source tower heat pump unit energy-saving test bed with low cost and high and low temperature working conditions is applicable to realize the detection of the refrigeration and heating performance of the cold and hot water heat pump unit and the detection of the refrigeration and heating performance of the heat source tower heat pump unit, has energy-saving and high-efficiency performance compared with the domestic, and has the following specific principles and schemes:
cold and heat supply system:
this system provides cooling and heating for the unit test system 76. Specifically, the hot water tank 13 stores constant-temperature hot water, on one hand, provides a cold source for the second operating mode machine 80 to cool the high-pressure section refrigerant of the second operating mode machine 80, on the other hand, provides a cold source for the first operating mode machine 81 to cool the high-pressure section refrigerant of the first operating mode machine 81, and the absorbed heat is taken away by air through the cooling tower 9; the cold water tank 26 stores cold water, provides a cold source for the hot-side heat exchanger 53, cools hot water in the hot-side heat exchanger 53, and takes away absorbed heat from low-pressure refrigerant through the evaporator 18; the cold water output from the evaporator of the second working condition machine 80 provides a cold source for the direct-expansion type cooler 4, and is used for cooling the inlet air in the direct-expansion type cooler 4.
The cold and hot water heat pump unit detects the refrigeration and heating working condition and is energy-saving and efficient:
the outlet of the condenser of the cold and hot water heat pump unit is connected with a first hot water inlet pipeline of the unit test system 76, and the inlet of the condenser is connected with a first hot water outlet pipeline to form a hot water pipeline; the outlet of the evaporator is connected with a cold water inlet third pipeline, and the inlet of the evaporator is connected with a cold water outlet third pipeline to form a cold water pipeline. For a hot water pipeline, heat in high-temperature hot water is absorbed and taken away by low-temperature cold water through the cold-side heat exchanger 69, heat is exchanged by the hot-side heat exchanger 53 and taken away by cold water provided by the cold and heat supply system 88, heat is exchanged by the air-conditioning finned tube cooler 2 irregularly and taken away by inlet air to form low-temperature hot water, and the flow of the hot water is adjusted through the electric valve 59 so as to control the temperature of outlet water. For a cold water pipeline, cold energy in low-temperature cold water is absorbed and taken away by high-temperature hot water through heat exchange of the cold side heat exchanger 69, heat exchange of the air-conditioning finned tube cooler 2 is taken away by inlet air, high-temperature water temperature is formed, cold water flow is adjusted through the electric valve 74, cold water is heated by the electric pipeline heater 73 to control the water temperature, hot water heat in a condenser generated by a tested machine in the testing process is effectively utilized, energy consumption of a cold and heat supply system 88 increased by providing the part of heat is saved, the requirement of the testing working condition of the tested machine on the inlet and outlet temperature of chilled water is met, and the double-layer effects of testing and energy saving are achieved.
The heat source tower heat pump unit detects the refrigeration and heating working conditions and is energy-saving and efficient:
for the refrigeration working condition of the heat source tower heat pump unit, the outlet of the evaporator is connected with a cold water inlet third pipeline, the inlet of the evaporator is connected with a cold water outlet third pipeline to form a cold water pipeline, the outlet air at the top of the heat source tower directly enters the air conditioning box through the fan and the air duct for treatment, and the treated air enters the heat source tower from the side through the fan air duct to form an air system. For a cold water pipeline, cold energy in low-temperature cold water is taken away by inlet air through heat exchange of the air-conditioning finned tube cooler 2 to form high-temperature water temperature, cold water flow is adjusted through the electric valve 74, cold water is heated by the pipeline electric heater 73 to control the water temperature, heat in return air is effectively utilized, energy consumption of a cold and heat supply system 88 increased by raising the temperature of the low-temperature cold water is avoided, the requirement of a tested machine on the temperature of inlet and outlet of chilled water is met, and a double-layer effect of testing and energy saving is achieved. For an air system, inlet air is filtered by a filter 1 and enters an air-conditioning finned tube cooler 2 for heat exchange, is subjected to temperature rise adjustment by an adjustable heater 3, is cooled and dehumidified by a direct expansion type cooler 4, is appropriately heated by the adjustable heater, is subjected to humidity adjustment by an electric humidifier 6, and is subjected to temperature adjustment by a fine adjustment heater 7, so that outlet air of an air-conditioning box reaches parameters required by a test working condition.
The design and operation principle of the high-low temperature test working condition machine is as follows:
the piston compressor which is wide in operation range and can realize large pressure ratio and can be operated under high and low temperature working conditions is selected, the high-temperature-level electronic expansion valve is selected for the high-temperature operation working condition, and the low-temperature-level electronic expansion valve is selected for the low-temperature-level operation working condition. When a high-temperature working condition test is carried out, the high-temperature electromagnetic valve and the corresponding expansion valve are opened; when the low-temperature working condition test is carried out, the low-temperature-level electromagnetic valve and the corresponding expansion valve are opened.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
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| CN114166514B (en) * | 2021-11-26 | 2023-07-25 | 中国北方发动机研究所(天津) | Test system and test method for simulating plateau environment expansion valve cooling liquid steam escape |
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| CN201522137U (en) * | 2009-10-12 | 2010-07-07 | 湖南秋克热源塔热泵科技工程有限公司 | Low heat source rotational flow cold-hot water machine set of heat source tower heat pump |
| CN102003838A (en) * | 2010-11-16 | 2011-04-06 | 刘秋克 | Solar-powered primary source heat source tower heat pump complete device |
| CN201875830U (en) * | 2010-12-01 | 2011-06-22 | 东南大学 | Latent heat recycling based efficient heat pump-type device for regenerating solutions in heat-source tower |
| CN102679624B (en) * | 2012-06-08 | 2014-07-16 | 湖南大学 | Solar energy and heat source tower heat pump combined triple supply air-conditioning system |
| CN202916108U (en) * | 2012-11-16 | 2013-05-01 | 无锡商业职业技术学院 | Energy saving device for testing performance coefficients of water source heat pump |
| US20160299038A1 (en) * | 2015-04-09 | 2016-10-13 | Palo Alto Research Center Incorporated | System and method for remotely inferring characteristics of thermostat-controlled appliances |
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