CN215731800U - Water-cooling heat exchange temperature control device of fuel cell engine test system - Google Patents
Water-cooling heat exchange temperature control device of fuel cell engine test system Download PDFInfo
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- CN215731800U CN215731800U CN202122242598.3U CN202122242598U CN215731800U CN 215731800 U CN215731800 U CN 215731800U CN 202122242598 U CN202122242598 U CN 202122242598U CN 215731800 U CN215731800 U CN 215731800U
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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
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Abstract
A water-cooling heat exchange temperature control device of a fuel cell engine test system belongs to the technical field of fuel cell engine test and solves the problems of poor dynamic response and difficult parameter determination existing in the process of adjusting the water-cooling temperature of an FCS fuel cell engine by utilizing PID parameters; the device comprises: FCS fuel cell engine, plate heat exchanger, internal cooling loop, external cooling loop; the water outlet and the water inlet of the FCS fuel cell engine are correspondingly and hermetically connected with one end of the inner cooling loop through pipelines respectively, and the first water inlet and the second water outlet of the plate heat exchanger are correspondingly and hermetically connected with the other end of the inner cooling loop through pipelines respectively; a second water inlet and a first water outlet of the plate heat exchanger are respectively and correspondingly hermetically connected with one end of an external cooling loop through a pipeline, and the other end of the external cooling loop is respectively used as an external cooling inlet and an external cooling outlet; PID parameters do not need to be debugged, and the dynamic response characteristic of water cooling control is improved.
Description
Technical Field
The utility model belongs to the technical field of fuel cell engine testing, and relates to a water-cooling heat exchange temperature control device of a fuel cell engine testing system.
Background
At present, a plate heat exchanger is generally adopted for water cooling of a fuel cell engine test system to realize heat exchange between an inner cooling loop and an outer cooling loop so as to control the water temperature of the inner cooling loop, a PID control method is generally adopted for temperature control, different PID parameters are triggered according to different difference values of target temperature and actual temperature, the temperature regulation capacity is enhanced when the difference value is large, the temperature regulation capacity is reduced when the difference value is small, and finally the control purpose that the actual temperature is equal to the target temperature is realized. The main disadvantages of the control of adjusting the water cooling temperature by using the PID parameters are that the dynamic response is poor and the parameters are difficult to determine, so that the proper parameters can be found out only by searching and debugging for a plurality of times, and because the external cooling conditions are different, the power is different, the parameters cannot be universal due to the difference of devices, different parameters need to be searched every time, and a plurality of groups of parameters are possibly needed to adapt to the change of different external conditions.
SUMMERY OF THE UTILITY MODEL
The utility model aims to design a water-cooling heat exchange temperature control device of a fuel cell engine test system, so as to solve the problems of poor dynamic response and difficult parameter determination existing in the prior art that the water-cooling temperature of an FCS fuel cell engine is adjusted by utilizing PID parameters.
The utility model solves the technical problems through the following technical scheme:
a water-cooling heat exchange temperature control device of a fuel cell engine test system comprises: the device comprises an FCS fuel cell engine (1), a plate heat exchanger (2), an inner cooling loop and an outer cooling loop; the water outlet and the water inlet of the FCS fuel cell engine (1) are respectively and correspondingly and hermetically connected with one end of the inner cooling loop through a pipeline, and the first water inlet and the second water outlet of the plate type heat exchanger (2) are respectively and correspondingly and hermetically connected with the other end of the inner cooling loop through pipelines; and a second water inlet and a first water outlet of the plate type heat exchanger (2) are respectively and correspondingly and hermetically connected with one end of the external cooling loop through pipelines, and the other end of the external cooling loop is respectively used as an external cooling inlet and an external cooling outlet.
The device transfers the heat generated by an FCS fuel cell engine (1) to a plate heat exchanger (2) by using an inner cooling loop, then transfers the heat to an outer cooling loop by using the plate heat exchanger (2), and achieves the temperature control of the inner cooling loop by controlling the flow of the outer cooling loop; PID parameters do not need to be debugged, so that the randomness and the rapidity of the power change and the heat productivity change of an engine galvanic pile can be adapted to the water-cooling heat exchange control of the FCS fuel cell engine (1), and the dynamic response characteristic of the water-cooling control is improved.
As a further improvement of the technical solution of the present invention, the internal cooling circuit includes: a first flow meter (5); the water outlet of the FCS fuel cell engine (1) is in sealed connection with the water inlet end of the first flowmeter (5) through a pipeline, the water outlet end of the first flowmeter (5) is in sealed connection with the first water inlet of the plate type heat exchanger (2) through a pipeline, and the second water outlet of the plate type heat exchanger (2) is in sealed connection with the water inlet of the FCS fuel cell engine (1) through a pipeline.
As a further improvement of the technical solution of the present invention, the internal cooling circuit further includes: a first temperature sensor (3); the first temperature sensor (3) is hermetically arranged on a pipeline between a water inlet of the FCS fuel cell engine (1) and a second water outlet of the plate type heat exchanger (2).
As a further improvement of the technical solution of the present invention, the internal cooling circuit further includes: a second temperature sensor (4); and the second temperature sensor (4) is hermetically arranged on a pipeline between a water outlet of the FCS fuel cell engine (1) and a water inlet end of the first flowmeter (5).
As a further improvement of the technical solution of the present invention, the external cooling circuit comprises: a proportional three-way valve (8) and a second flowmeter (9); a first water outlet of the plate heat exchanger (2) is hermetically connected with a water inlet end of a second flowmeter (9) through a pipeline, and a water outlet end of the second flowmeter (9) is hermetically connected with an external cold outlet through a pipeline; the first port of the proportional three-way valve (8) is hermetically connected with the water outlet end of the second flow meter (9) through a pipeline; and a second port of the proportional three-way valve (8) is in sealing connection with a second water inlet of the plate heat exchanger (2) through a pipeline, and a third port of the proportional three-way valve (8) is in sealing connection with an external cold inlet through a pipeline.
As a further improvement of the technical solution of the present invention, the external cooling circuit further comprises: a third temperature sensor (6); and the third temperature sensor (6) is hermetically arranged on a pipeline between the second port of the proportional three-way valve (8) and the second water inlet of the plate heat exchanger (2).
As a further improvement of the technical solution of the present invention, the external cooling circuit further comprises: a fourth temperature sensor (7); the fourth temperature sensor (7) is hermetically arranged on a pipeline between the first water outlet of the plate heat exchanger (2) and the water inlet end of the second flowmeter (9).
The utility model has the advantages that:
the device transfers the heat generated by an FCS fuel cell engine (1) to a plate heat exchanger (2) by using an inner cooling loop, then transfers the heat to an outer cooling loop by using the plate heat exchanger (2), and achieves the temperature control of the inner cooling loop by controlling the flow of the outer cooling loop; PID parameters do not need to be debugged, so that the randomness and the rapidity of the power change and the heat productivity change of an engine galvanic pile can be adapted to the water-cooling heat exchange control of the FCS fuel cell engine (1), and the dynamic response characteristic of the water-cooling control is improved.
Drawings
Fig. 1 is a structural diagram of a water-cooling heat exchange temperature control device of a fuel cell engine test system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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.
The technical scheme of the utility model is further described by combining the drawings and the specific embodiments in the specification:
example one
As shown in fig. 1, a water-cooling heat exchange temperature control device of a fuel cell engine test system includes: the fuel cell system comprises an FCS fuel cell engine 1, a plate heat exchanger 2, a first temperature sensor 3, a second temperature sensor 4, a first flow meter 5, a third temperature sensor 6, a fourth temperature sensor 7, a proportional three-way valve 8 and a second flow meter 9.
The water outlet of the FCS fuel cell engine 1 is hermetically connected with the water inlet end of a first flowmeter 5 through a pipeline, the water outlet end of the first flowmeter 5 is hermetically connected with a first water inlet of a plate type heat exchanger 2 through a pipeline, a first water outlet of the plate type heat exchanger 2 is hermetically connected with the water inlet end of a second flowmeter 9 through a pipeline, and the water outlet end of the second flowmeter 9 is hermetically connected with an external cold outlet through a pipeline; the first port of the proportional three-way valve 8 is hermetically connected with the water outlet end of the second flow meter 9 through a pipeline; a second port of the proportional three-way valve 8 is hermetically connected with a second water inlet of the plate type heat exchanger 2 through a pipeline, and a second water outlet of the plate type heat exchanger 2 is hermetically connected with a water inlet of the FCS fuel cell engine 1 through a pipeline; a third port of the proportional three-way valve 8 is hermetically connected with the external cold inlet through a pipeline; the first temperature sensor 3 is hermetically arranged on a pipeline between a water inlet of the FCS fuel cell engine 1 and a second water outlet of the plate heat exchanger 2; the second temperature sensor 4 is hermetically arranged on a pipeline between the water outlet of the FCS fuel cell engine 1 and the water inlet end of the first flowmeter 5; the third temperature sensor 6 is hermetically arranged on a pipeline between the second port of the proportional three-way valve 8 and the second water inlet of the plate heat exchanger 2; the fourth temperature sensor 7 is hermetically mounted on the pipeline between the first water outlet of the plate heat exchanger 2 and the water inlet end of the second flowmeter 9. The readings of the first temperature sensor 3, the second temperature sensor 4, the third temperature sensor 6 and the fourth temperature sensor 7 are respectively T1, T2, T3 and T4; the readings of the first flowmeter 5 and the second flowmeter 9 are Q1 and Q2 respectively.
The working principle of the device is as follows:
the fuel cell engine is a heat source, and is internally provided with a heat-generating electric pile and a water pump, the heat-generating power of the electric pile has randomness and rapidity, and the rotating speed of the water pump generally follows the output electric power of the electric pile and also has randomness and rapidity. The target temperature of control is T1, and the current control mode is to control the opening degree of an external cold ratio train valve (three-way or two-way) according to the difference value between the target temperature and the actual temperature, so as to control external cooling water with different flow rates to enter the plate heat exchanger, and realize the purpose of controlling the temperature of T1. The heat generated by the FCS fuel cell engine is transferred to the plate heat exchanger 2 by the inner cooling water loop and then transferred to the outer cooling loop by the plate heat exchanger 2, and a heat balance relationship exists between the inner cooling water loop and the outer cooling water loop without considering the natural loss of the heat. The heat generated by the FCS fuel cell engine 1 is equal to (T2-T1) Q1C 1, and C1 is the specific heat capacity of the internal cooling coolant. The heat carried away by the external cooling circuit through the plate heat exchanger 2 is equal to (T3-T4) Q2C 2, C2 being the specific heat capacity of the external cooling liquid. The heat preservation measures are taken for all the pipelines, and no consideration is given to the heat damage of the pipelines in the air, and at the moment, (T2-T1) Q1C 1 (T3-T4) Q2C 2 exists, namely the heat generated by the FCS fuel cell engine 1 is equal to the heat taken away by external cold, and the FCS fuel cell engine is in a heat balance state. When the power of the electric stack in the FCS fuel cell engine 1 changes, namely T2 and Q1 change, namely the internal cooling heat quantity changes, (T2-T1) Q1C 1 changes, the value of the external cooling flow Q2 is controlled, and the value reaches (T2-T1) Q1C 1 (T3-T4) Q2C 2 again, so that the temperature control of T1 is realized. When the temperature target value of T1 is actively changed, the adjustment of Q2 can also be realized. Including changes in the external cooling conditions, such as changes in the external cooling inlet T4, temperature differences affecting the temperature of the water inside and outside the panel switch, and changes in the external cooling water pressure, affecting the flow through the panel switch, can be eliminated by control of the external cooling flow Q2. According to the control method, PID parameters do not need to be debugged to control the external cooling proportional valve, the flow rate required by external cooling is calculated by calculating the heat productivity of internal cooling, the proportional valve is adjusted to control the external cooling flow rate, and simply, the control of the external cooling proportional valve is closed by the sampling value of the external cooling flow rate Q2.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a fuel cell engine test system water-cooling heat transfer temperature control device which characterized in that includes: the device comprises an FCS fuel cell engine (1), a plate heat exchanger (2), an inner cooling loop and an outer cooling loop; the water outlet and the water inlet of the FCS fuel cell engine (1) are respectively and correspondingly and hermetically connected with one end of the inner cooling loop through a pipeline, and the first water inlet and the second water outlet of the plate type heat exchanger (2) are respectively and correspondingly and hermetically connected with the other end of the inner cooling loop through pipelines; and a second water inlet and a first water outlet of the plate type heat exchanger (2) are respectively and correspondingly and hermetically connected with one end of the external cooling loop through pipelines, and the other end of the external cooling loop is respectively used as an external cooling inlet and an external cooling outlet.
2. The fuel cell engine test system water-cooling heat exchange temperature control device of claim 1, wherein the internal cooling loop comprises: a first flow meter (5); the water outlet of the FCS fuel cell engine (1) is in sealed connection with the water inlet end of the first flowmeter (5) through a pipeline, the water outlet end of the first flowmeter (5) is in sealed connection with the first water inlet of the plate type heat exchanger (2) through a pipeline, and the second water outlet of the plate type heat exchanger (2) is in sealed connection with the water inlet of the FCS fuel cell engine (1) through a pipeline.
3. The fuel cell engine test system water-cooling heat exchange temperature control device of claim 2, wherein the internal cooling loop further comprises: a first temperature sensor (3); the first temperature sensor (3) is hermetically arranged on a pipeline between a water inlet of the FCS fuel cell engine (1) and a second water outlet of the plate type heat exchanger (2).
4. The fuel cell engine test system water-cooling heat exchange temperature control device of claim 2, wherein the internal cooling loop further comprises: a second temperature sensor (4); and the second temperature sensor (4) is hermetically arranged on a pipeline between a water outlet of the FCS fuel cell engine (1) and a water inlet end of the first flowmeter (5).
5. The fuel cell engine test system water-cooling heat exchange temperature control device as claimed in claim 1, wherein the external cooling loop comprises: a proportional three-way valve (8) and a second flowmeter (9); a first water outlet of the plate heat exchanger (2) is hermetically connected with a water inlet end of a second flowmeter (9) through a pipeline, and a water outlet end of the second flowmeter (9) is hermetically connected with an external cold outlet through a pipeline; the first port of the proportional three-way valve (8) is hermetically connected with the water outlet end of the second flow meter (9) through a pipeline; and a second port of the proportional three-way valve (8) is in sealing connection with a second water inlet of the plate heat exchanger (2) through a pipeline, and a third port of the proportional three-way valve (8) is in sealing connection with an external cold inlet through a pipeline.
6. The fuel cell engine test system water-cooling heat exchange temperature control device of claim 5, wherein the external cooling loop further comprises: a third temperature sensor (6); and the third temperature sensor (6) is hermetically arranged on a pipeline between the second port of the proportional three-way valve (8) and the second water inlet of the plate heat exchanger (2).
7. The fuel cell engine test system water-cooling heat exchange temperature control device of claim 5, wherein the external cooling loop further comprises: a fourth temperature sensor (7); the fourth temperature sensor (7) is hermetically arranged on a pipeline between the first water outlet of the plate heat exchanger (2) and the water inlet end of the second flowmeter (9).
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| CN202122242598.3U CN215731800U (en) | 2021-09-15 | 2021-09-15 | Water-cooling heat exchange temperature control device of fuel cell engine test system |
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| CN202122242598.3U CN215731800U (en) | 2021-09-15 | 2021-09-15 | Water-cooling heat exchange temperature control device of fuel cell engine test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389213A (en) * | 2022-10-26 | 2022-11-25 | 南京理工大学 | Water-cooling multi-channel high-temperature gas pressure measuring device and method for ramjet engine |
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2021
- 2021-09-15 CN CN202122242598.3U patent/CN215731800U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389213A (en) * | 2022-10-26 | 2022-11-25 | 南京理工大学 | Water-cooling multi-channel high-temperature gas pressure measuring device and method for ramjet engine |
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Address after: 230088 No.8 DALONGSHAN Road, hi tech Zone, Hefei City, Anhui Province Patentee after: Cowell Technology Co.,Ltd. Address before: 230088 No.8 DALONGSHAN Road, hi tech Zone, Hefei City, Anhui Province Patentee before: Hefei Kewei Power System Co.,Ltd. |
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