CN115728084A - Performance test system for cold storage heat exchanger - Google Patents
Performance test system for cold storage heat exchanger Download PDFInfo
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- CN115728084A CN115728084A CN202211430505.2A CN202211430505A CN115728084A CN 115728084 A CN115728084 A CN 115728084A CN 202211430505 A CN202211430505 A CN 202211430505A CN 115728084 A CN115728084 A CN 115728084A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention relates to the technical field of energy storage system testing, in particular to a performance testing system of a cold accumulation heat exchanger, which comprises: the liquid storage part is used for storing liquid media, and a return pipeline is communicated between the inlet end and the outlet end of the liquid storage part; the cold storage pipeline is communicated with the return pipeline and is communicated with one end of a heat exchange flow channel of the cold storage heat exchanger; the cold release pipeline is communicated with the return pipeline and is communicated with the other end of the heat exchange flow channel of the cold accumulation heat exchanger, and the cold release pipeline is provided with an electric heater; an adjusting pipeline is connected between two ends of the heat exchange flow channel, and first monitoring pieces are installed at the inlet end and the outlet end of the heat exchange flow channel. The liquid storage part provides a pure substance of a liquid medium, the medium flowing inside the system can be prevented from being changed into a solid state to influence the operation of the system in the test process, and the stable operation of the detection system in the test process is ensured.
Description
Technical Field
The invention relates to the technical field of energy storage system testing, in particular to a performance testing system for a cold accumulation heat exchanger.
Background
In the energy storage system, the cold accumulation heat exchanger is used for storing cold energy in the system into the cold accumulation piece in a heat exchange manner, and when the system needs energy, the cold energy in the cold accumulation piece is transmitted to a medium in the system through the cold accumulation heat exchanger. The cold energy is stored and utilized in the system, and the performance of the cold accumulation heat exchanger is of great importance to the high efficiency and stability of the whole energy storage process.
The working process of the cold accumulation heat exchanger comprises two links of cold accumulation and cold release, and a test system in the prior art respectively completes the cold accumulation and cold release processes by using a low-temperature liquid pump and an air compressor. The air composition is unstable, and the water vapor and the carbon dioxide in the air become solid under the ultralow temperature condition, so that the normal operation of the equipment is influenced, and the heat transfer process is also adversely affected.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem of overcoming the defect that when the cold accumulation heat exchanger is detected in the prior art, the water vapor and the carbon dioxide in the system are changed into solid states under the ultralow temperature condition to influence the operation of detection equipment, thereby providing the performance test system for the cold accumulation heat exchanger.
In order to solve the above technical problem, the present invention provides a performance test system for a cold storage heat exchanger, comprising:
the liquid storage part is used for storing liquid media, and a return pipeline is communicated between the inlet end and the outlet end of the liquid storage part;
the cold storage pipeline is communicated with the return pipeline and is communicated with one end of the heat exchange flow channel of the cold storage heat exchanger;
the cold releasing pipeline is communicated with the return pipeline, the cold storage pipeline is communicated with the other end of the heat exchange flow channel of the cold storage heat exchanger, and the cold releasing pipeline is provided with an electric heater;
still be connected with the regulation pipeline between the heat transfer runner both ends, the intercommunication has the vaporization pipeline on the regulation pipeline, and first monitoring piece is all installed at the both ends of heat transfer runner for detect the temperature and the pressure data of medium.
Optionally, a first pneumatic regulating valve is installed on the regulating pipeline, and the vaporizing pipeline is installed between the downstream of the first pneumatic regulating valve and the heat exchange flow channel.
Optionally, an adjusting throttle valve is further installed on the adjusting pipeline, and the adjusting throttle valve is installed between the heat exchange flow channel and the vaporization pipeline.
Optionally, the liquid medium is liquid nitrogen.
Optionally, a cryogenic liquid pump is mounted in the return line.
Optionally, a main throttle and a main stop valve are installed on the return line, and the cryogenic liquid pump is installed between the main throttle and the main stop valve.
Optionally, the cold release line and the cold storage line are both connected to a return line between the main throttle valve and the cryogenic liquid pump.
Optionally, the cooling release pipeline is further provided with a second pneumatic regulating valve, a cooling release vaporizer and a buffer tank in sequence, and the electric heater is communicated with an outlet of the buffer tank.
Optionally, a second monitoring part is installed between the electric heater and the buffer tank and used for detecting temperature and pressure data of the medium in the pipeline.
Optionally, a cold storage shut-off valve is installed on the cold storage pipeline.
The technical scheme of the invention has the following advantages:
1. the invention provides a performance test system of a cold accumulation heat exchanger, which comprises: the liquid storage part is used for storing liquid media, and a return pipeline is communicated between the inlet end and the outlet end of the liquid storage part; the cold storage pipeline is communicated with the return pipeline and is communicated with one end of a heat exchange flow channel of the cold storage heat exchanger; the cold release pipeline is communicated with the return pipeline and is communicated with the other end of the heat exchange flow channel of the cold accumulation heat exchanger, and the cold release pipeline is provided with an electric heater; still be connected with the regulation pipeline between the heat transfer runner both ends, the intercommunication has the vaporization pipeline on the regulation pipeline, and first monitoring piece is all installed at the both ends of heat transfer runner for detect the temperature and the pressure data of medium.
Other flow passages of the cold accumulation heat exchanger can be connected with energy storage equipment and used for storing cold energy during cold accumulation test and releasing the cold energy during cold release test. When the system operates, the return pipeline is opened, the liquid medium flows out of the liquid storage part and returns to the liquid storage part, and the pressure of the medium in the system is kept stable by controlling the flow rate of the medium. When the cold storage test is carried out, the cold storage pipeline is opened, the liquid medium enters the heat exchange flow channel of the cold storage heat exchanger through the cold storage pipeline, and after the cold energy in the medium is released, the liquid medium enters the vaporization pipeline through the adjusting pipeline and then is released out of the system. When a cold release test is carried out, the cold release pipeline is opened, a medium enters a heat exchange flow channel of the cold accumulation heat exchanger after being heated by the electric heater, and is released out of the system after entering the vaporization pipeline through the regulating pipeline after cold energy is absorbed and cooled. When the testing is carried out, the first monitoring part is utilized to monitor the temperature and pressure data of the medium at the inlet and the outlet of the heat exchange flow passage in real time, and the data are used for representing the heat exchange performance of the cold accumulation heat exchanger. In the test process, the liquid storage part is used for providing a pure substance of a liquid medium, so that the medium flowing inside the system can be prevented from becoming a solid state to influence the operation of the system in the test process, and the stable operation of the detection system in the test process is ensured.
2. According to the performance test system for the cold storage heat exchanger, the first pneumatic regulating valve is installed on the regulating pipeline, and the vaporization pipeline is installed between the downstream of the first pneumatic regulating valve and the heat exchange flow channel. The first starting regulating valve is arranged on the regulating pipeline, so that the medium in the regulating pipeline is throttled during a cold release test, part of the medium is liquefied, and the pressure regulation of the medium in the regulating pipeline is realized.
3. According to the performance test system of the cold accumulation heat exchanger, the adjusting throttle valve is further arranged on the adjusting pipeline and is arranged between the heat exchange flow channel and the vaporization pipeline. Through setting up the regulation choke valve on the governing pipeline for the medium of following output in the cold-storage heat exchanger during cold storage test inputs main vaporizer again after the throttle, adjusts the medium pressure in the governing pipeline, promotes test system's stability.
4. According to the performance test system for the cold accumulation heat exchanger, the main throttle valve and the main stop valve are installed on the return pipeline, and the low-temperature liquid pump is installed between the main throttle valve and the main stop valve. The opening and closing of the return pipeline are controlled by the main throttle valve and the main stop valve, and the medium pressure in the return pipeline is controlled, so that the medium pressure in the return pipeline is kept stable, a medium with stable pressure is provided for the cold storage pipeline or the cold release pipeline, and the stability of the test system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a performance test system of a cold storage heat exchanger provided in an embodiment of the present invention.
Description of reference numerals: 1. a liquid storage member; 2. a master cut-off valve; 3. a cryogenic liquid pump; 4. a main throttle valve; 5. a cold storage stop valve; 6. a second pneumatic regulating valve; 7. a cooling vaporizer; 8. a buffer tank; 9. a first monitoring member; 10. a second monitoring member; 11. an electric heater; 12. a flow meter; 13. a first pneumatic regulating valve; 14. adjusting a throttle valve; 15. a main vaporizer; 16. a control component; 17. adjusting a stop valve; 18 a cold storage device; 19. a cold accumulation heat exchanger.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
As shown in fig. 1, the system for testing the performance of the energy storage device integrating cold storage and release provided in this embodiment includes: a cold releasing pipeline, a cold storing pipeline and a liquid nitrogen storage tank as a liquid storage part 1.
The liquid storage component 1 is used for storing a liquid medium, and in this embodiment, the liquid medium is liquid nitrogen. A return pipeline is communicated between the inlet end of the liquid storage part 1 and the outlet end thereof. The cold storage pipeline is communicated with the return pipeline, and the cold storage pipeline is communicated with one end of a heat exchange flow channel of the cold storage heat exchanger 19. The cold releasing pipeline is communicated with the return pipeline, the cold storage pipeline is communicated with the other end of the heat exchange flow channel of the cold storage heat exchanger 19, and the electric heater 11 is installed on the cold releasing pipeline. An adjusting pipeline is further connected between the two ends of the heat exchange runner, the adjusting pipeline is communicated with a vaporization pipeline, and first monitoring pieces 9 are mounted at the inlet end and the outlet end of the heat exchange runner and used for detecting temperature and pressure data of a medium. In this embodiment, the first detecting member includes a pressure sensor and a temperature sensor.
A first pneumatic regulating valve 13 is arranged on the regulating pipeline, and the vaporizing pipeline is arranged between the downstream of the first pneumatic regulating valve 13 and the heat exchange flow channel. The adjusting pipeline is also provided with an adjusting throttle valve 14, and the adjusting throttle valve 14 is arranged between the heat exchange flow channel and the vaporization pipeline.
The low-temperature liquid pump 3, the main throttle valve 4 and the main stop valve 2 are installed on the return pipeline, and the low-temperature liquid pump 3 is installed between the main throttle valve 4 and the main stop valve 2. The cold release pipeline and the cold storage pipeline are both connected to a return pipeline between the main throttle valve 4 and the low-temperature liquid pump 3.
The cold release pipeline is also sequentially provided with a second pneumatic regulating valve 6, a cold release vaporizer 7 and a buffer tank 8, and an electric heater 11 is communicated with the outlet of the buffer tank 8. And a second monitoring part 10 is arranged between the electric heater 11 and the buffer tank 8 and is used for detecting the temperature and pressure data of the medium in the pipeline. In this embodiment, the second monitoring member 10 includes a temperature sensor and a pressure sensor. And a cold storage stop valve 5 is arranged on the cold storage pipeline and used for controlling the on-off of the cold storage pipeline.
A data acquisition and control subsystem as a control assembly 16 is also installed in the system for acquiring data measured by the sensors and the flow meter 12 in the system and controlling the opening or closing of the valves in the system, the operating power of the pump body and the operating power of the electric heater 11 according to the acquired data and control data input by external workers. The main stop valve 2, the cryogenic liquid pump 3, the main throttle valve 4, the cold storage stop valve 5, the second pneumatic control valve 6, the two groups of first monitoring parts 9, the one group of second monitoring parts 10, the electric heater 11, the four flow meters 12, the first pneumatic control valve 13 and the adjusting throttle valve 14 in the system are all in signal connection with the data acquisition and control subsystem.
The cryogenic liquid pump 3 is used for regulating the medium pressure in the return line to keep stable. Before the system operates, the low-temperature liquid pump 3 is precooled for one time to reduce the evaporation amount after operation and ensure the pressure to be stable. The adjusting pipelines and the two ends are provided with adjusting stop valves 17, when the cooling pipeline works to carry out cooling test, the lower adjusting stop valve is opened, and the upper adjusting stop valve is closed; when the cold storage pipeline works to perform cold storage testing, the adjusting stop valve at the lower part is closed, and the adjusting stop valve at the upper part is opened.
The return line pressure adjustment steps are as follows: opening main stop valve 2 and main throttle valve 4, closing second pneumatic control valve 6 and cold storage stop valve 5, ensure that only the return line is unblocked, then open cryogenic liquid pump 3, through the frequency adjustment return line's of adjustment cryogenic liquid pump 3 pressure, finally realize the interior liquid nitrogen pressure stability of return line, provide the liquid nitrogen of pressure stability for follow-up test.
When the cold storage and heat exchange member is subjected to a cold storage test or a cold storage test, the other heat exchange flow passage in the cold storage and heat exchange member is communicated with the external cold storage device 18. In this embodiment, the cold storage device is a cold storage packed bed filled with cold storage material.
Cold storage test flow: liquid nitrogen flows out from an outlet of a liquid nitrogen storage tank serving as the liquid storage part 1 and returns to the liquid storage part 1 through a return pipeline in sequence through the main stop valve 2, the cryogenic liquid pump 3 and the main throttle valve 4. The branch liquid nitrogen passes through the low-temperature liquid pump 3, passes through the cold storage stop valve 5, enters the heat exchange flow channel of the cold storage heat exchanger serving as the tested equipment from the cold storage pipeline, flows from bottom to top, and the gas-liquid mixture after the heat exchange enters the main vaporizer 15 on the vaporization pipeline through the adjusting pipeline and is discharged out of the system after being vaporized.
The procedure of the cold release test: liquid nitrogen flows out from an outlet of a liquid nitrogen storage tank serving as the liquid storage part 1 and returns to the liquid storage part 1 through the main stop valve 2, the cryogenic liquid pump 3 and the main throttle valve 4 in sequence through the return pipeline. The branch enters a cold release vaporizer 7 after the flow of the branch is regulated by a second pneumatic regulating valve 6 after passing through a cryogenic liquid pump 3, the branch is subjected to temperature regulation by an electric heater 11 after passing through a buffer tank 8, the branch enters a heat exchange runner of a cold accumulation heat exchanger serving as tested equipment from top to bottom for heat exchange, throttling is realized at the outlet of the heat exchange runner through a first pneumatic regulating valve 13, the supercritical low-temperature nitrogen is liquefied, the pressure regulation is realized, and a gas-liquid mixture enters a main vaporizer 15 on a vaporization pipeline through a regulating pipeline and is discharged out of a system after being evaporated.
During testing, the first monitoring part 9 is used for monitoring the temperature and pressure data of the medium at the inlet and the outlet of the heat exchange flow passage in real time, the second monitoring part 10 is used for monitoring the temperature and pressure data of the medium in the cold release pipeline before entering the electric heater 11 in real time, and the temperature and pressure data measured by the first monitoring part 9 and the second monitoring part 10 are used for representing the heat exchange performance of the cold accumulation heat exchanger. In the testing process, the liquid storage part 1 is used for providing a pure substance of a liquid medium, so that the medium flowing inside the system can be prevented from becoming a solid state to influence the operation of the system in the testing process, and the stable operation of the detection system in the testing process is ensured.
In the prior art, when the performance of the cold accumulation heat exchanger is tested, the low-temperature liquid pump 3 and the air compressor are required to be respectively used for realizing cold accumulation and cold release processes, the flow is complex, the flowing working medium elements are different in composition, and the unstable system performance is easily caused due to the unstable air components. The performance test system for the cold accumulation heat exchanger provided by the embodiment can realize the performance test system for the energy storage component for storing and releasing energy at the same time only by using the low-temperature liquid pump 3. The flowing medium is liquid nitrogen or nitrogen, the element composition is the same, the nitrogen is a pure substance, compared with the use of air, the system performance is more stable, and the electric heater 11 can realize the adjustment of different air temperatures. The pressure regulating mode of the variable-frequency low-temperature liquid pump 3 with the pneumatic regulating valve is adopted, and the flow regulating mode of the return pipeline with the branch is utilized, so that the regulating range of the pressure and the flow of the working medium is enlarged. The combination of the cryogenic liquid pump 3 and the cold release vaporizer 7 can realize the cold storage and the cold release functions at the same time, and the use of equipment such as a compressor and the like is reduced. Pure nitrogen is used as a flowing working medium in the cold releasing process, so that the system state in the cold storing and releasing process is more stable. The buffer tank 8 and the electric heater 11 are combined for use, so that the flow rate and the temperature of the nitrogen can be ensured to be stable.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.
Claims (10)
1. A performance test system for a cold storage heat exchanger is characterized by comprising:
the liquid storage device comprises a liquid storage part (1) and a liquid storage device, wherein the liquid storage part is used for storing a liquid medium, and a return pipeline is communicated between an inlet end and an outlet end of the liquid storage part (1);
the cold storage pipeline is communicated with the return pipeline and is communicated with one end of a heat exchange flow channel of the cold storage heat exchanger;
the cold release pipeline is communicated with the return pipeline, the cold release pipeline is communicated with the other end of the heat exchange flow channel of the cold accumulation heat exchanger, and an electric heater (11) is arranged on the cold release pipeline;
still be connected with the regulation pipeline between the heat transfer runner both ends, the last intercommunication of regulation pipeline has the vaporization pipeline, first monitoring piece (9) are all installed at the both ends of heat transfer runner for detect the temperature and the pressure data of medium.
2. The cold-storage heat exchanger performance test system of claim 1, characterized in that a first pneumatic regulating valve (13) is installed on the regulating pipeline, and the vaporization pipeline is installed between the downstream of the first pneumatic regulating valve (13) and the heat exchange flow channel.
3. The cold storage heat exchanger performance test system of claim 2, characterized in that an adjusting throttle valve (14) is further installed on the adjusting pipeline, and the adjusting throttle valve (14) is installed between the heat exchange flow channel and the vaporization pipeline.
4. The cold-storage heat exchanger performance test system according to any one of claims 1 to 3, wherein the liquid medium is liquid nitrogen.
5. The cold storage heat exchanger performance test system according to any one of claims 1 to 3, wherein a cryogenic liquid pump (3) is mounted on the return line.
6. The cold-storage heat exchanger performance testing system of claim 5, characterized in that a main throttle valve (4) and a main stop valve (2) are installed on the return line, and the cryogenic liquid pump (3) is installed between the main throttle valve (4) and the main stop valve (2).
7. The cold-storage heat exchanger performance test system according to claim 6, characterized in that the cold release line and the cold storage line are both connected on a return line between the main throttle valve (4) and the cryogenic liquid pump (3).
8. The performance test system of the cold accumulation heat exchanger according to any one of the claims 1 to 3, characterized in that a second pneumatic regulating valve (6), a cold releasing vaporizer (7) and a buffer tank (8) are further sequentially installed on the cold releasing pipeline, and the electric heater (11) is communicated with an outlet of the buffer tank (8).
9. The cold-storage heat exchanger performance test system of claim 8, characterized in that a second monitoring member (10) is installed between the electric heater (11) and the buffer tank (8) for detecting temperature and pressure data of the medium in the pipeline.
10. The cold storage heat exchanger performance test system according to any one of claims 1 to 3, wherein a cold storage stop valve (5) is mounted on the cold storage pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211430505.2A CN115728084A (en) | 2022-11-15 | 2022-11-15 | Performance test system for cold storage heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211430505.2A CN115728084A (en) | 2022-11-15 | 2022-11-15 | Performance test system for cold storage heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN115728084A true CN115728084A (en) | 2023-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211430505.2A Pending CN115728084A (en) | 2022-11-15 | 2022-11-15 | Performance test system for cold storage heat exchanger |
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| CN (1) | CN115728084A (en) |
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- 2022-11-15 CN CN202211430505.2A patent/CN115728084A/en active Pending
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