Thermal test device and method for high-temperature and high-pressure water-water passive residual discharge heat exchanger in cooling water tank

Abstract

The embodiment of the invention provides a thermal test device and method for a high-temperature and high-pressure water-water passive residual discharge heat exchanger arranged in a cooling water tank. The device comprises a passive residual discharge heat exchanger, a hot water circulating pump, an electric heater, a loop make-up water pump, a water tank cooling pump, a cooling water tank cooler, a nitrogen pressure stabilizer, a loop make-up water tank, a multifunctional test auxiliary water tank, a first check valve, a first electric stop valve, a first electric control valve, a second check valve, a second electric stop valve and a third electric stop valve. A third check valve, a second electric control valve, a fourth electric stop valve, a bypass control valve, a sixth electric stop valve, a first flow meter, a second flow meter, a third flow meter, a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor and a seventh electric stop valve; and an eighth electric stop valve and a cooling water tank. According to the technical scheme, the actual operation condition of the passive residual discharge heat exchanger can be conveniently simulated, stable control over the small-flow flowing condition of the hot side is achieved, and control over the steady-state temperature condition of the cold side is achieved.

Description

Technical Field

[0001] The present application relates to the field of ship propulsion technology, and in particular to a thermal engineering test device and method for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank. Background Art

[0002] In the field of ship propulsion, the role of the passive waste heat removal system is to remove the decay heat of the reactor to the final heat sink through natural circulation when the entire ship loses power. In a typical design, the hot side of the passive waste heat exchanger is high-temperature and high-pressure water, and the cold side is water in the cooling water tank. For this high-temperature and high-pressure water-water passive waste heat exchanger placed in the cooling water tank, its thermal engineering assessment test is mainly different from the conventional heat exchanger assessment test in the following ways:

[0003] (1) For conventional heat exchangers, the temperature and flow rate of the hot and cold sides of the heat exchanger are basically stable during operation, and these stable test conditions are used in thermal tests. For passive residual heat removal heat exchangers, the temperature and flow rate of the hot and cold sides of the heat exchanger are constantly changing with the shutdown time, overboard seawater temperature and other conditions during operation. Therefore, one or more typical operating conditions need to be proposed during the design process.

[0004] (2) The passive exhaust heat exchanger placed in the cooling water tank does not have the concept of the shell side of the conventional heat exchanger, so it is necessary to simulate the temperature conditions in the cooling water tank.

[0005] (3) Since the principle is natural circulation heat exchange, the flow rates on the hot and cold sides of the passive exhaust heat exchanger are relatively low when it is in operation. It is difficult to adjust to the parameters required for the test assessment by directly using a regulating valve.

[0006] (4) It is necessary to improve the versatility of the passive exhaust heat exchanger test system as much as possible, and the test system can be easily applied to other water-water circulation natural circulation heat exchangers. Summary of the invention

[0007] In response to the need for thermal performance assessment testing of a high-temperature and high-pressure water-water passive waste heat removal heat exchanger placed in a cooling water tank, an embodiment of the present invention proposes a thermal performance test scheme for a high-temperature and high-pressure water-water passive waste heat exchanger placed in a cooling water tank. This technical scheme can conveniently simulate the actual operating conditions of the passive waste heat exchanger, achieve stable control of small flow conditions on the hot side, and achieve control of steady-state temperature conditions on the cold side.

[0008] An embodiment of the present invention provides a thermal testing device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank, the testing device comprising:

[0009] Passive waste heat exchanger 1, hot water circulation pump 2, electric heater 3, loop water supply pump 4, water tank cooling pump 5, cooling water tank cooler 6, nitrogen pressure stabilizer 7, loop water supply tank 8, multifunctional test auxiliary water tank 9, first check valve 10, first electric stop valve 11, first electric regulating valve 12, second check valve 13, second electric stop valve 14, third electric stop valve 15, third check valve 16, second electric regulating valve 17, fourth electric stop valve 18, bypass regulating valve 19, sixth electric stop valve 20, first flow meter 21, second flow meter 22, third flow meter 23, first temperature sensor 24, second temperature sensor 25, third temperature sensor 26, fourth temperature sensor 27, fifth temperature sensor 28, seventh electric stop valve 30, eighth electric stop valve 31 and cooling water tank 29;

[0010] The cooling water tank 29 is used to contain cooling liquid, and the passive waste heat exchanger 1 is arranged in the cooling water tank 29. The output end of the passive waste heat exchanger 1, the third electric stop valve 15, the hot water circulation pump 2, the first check valve 10, the first electric stop valve 11, the electric heater 3, the eighth electric stop valve 31, the first electric regulating valve 12, the first flow meter 21, the second flow meter 22, the seventh electric stop valve 30, and the input end of the passive waste heat exchanger 1 are connected in sequence through pipelines, and the pipelines at the output end and the input end of the passive waste heat exchanger 1 are correspondingly connected with the first temperature sensor 24 and the second temperature sensor 25;

[0011] The loop water supply tank 8 is connected to between the first flow meter 21 and the second flow meter 22 through the loop water supply pump 4, the second check valve 13, and the second electric stop valve 14 in sequence;

[0012] The nitrogen pressure regulator 7 is connected to between the first flow meter 21 and the second flow meter 22 via the sixth electric stop valve 20;

[0013] A bypass pipeline provided with a bypass regulating valve 19 is connected between the third electric stop valve 15 and the hot water circulation pump 2 and between the first flow meter 21 and the second flow meter 22;

[0014] The cooling water tank cooler 7 is arranged in the cooling water tank 29, and is used to cool the cooling liquid contained in the cooling water tank 29. The output end of the cooling water tank cooler 7, the fourth electric stop valve 18, the third flow meter 23, the multifunctional test auxiliary water tank 9, the water tank cooling pump 5, the third check valve 16, the second electric regulating valve 17, and the input end of the cooling water tank cooler 7 are connected in sequence through pipelines, and the pipelines at the output end and the input end of the cooling water tank cooler 7 are correspondingly connected with the fifth temperature sensor 28 and the fourth temperature sensor 27;

[0015] The cooling water tank 29 is connected to the third temperature sensor 26 for detecting the temperature of the cooling liquid contained in the cooling water tank 29 .

[0016] In some embodiments, the rated heat exchange capacity of the electric heater 3 is greater than twice the rated heat exchange capacity of the passive exhaust heat exchanger 1 .

[0017] In some embodiments, the rated heat exchange capacity of the cooling water tank cooler 7 is greater than the rated heat exchange capacity of the passive exhaust heat exchanger 1 .

[0018] An embodiment of the present invention provides a test method, based on a thermal test device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank as described in any of the above embodiments, the method comprising:

[0019] When the passive waste heat exchanger 1 is tested and assessed, it is first debugged in a cold state, the first electric stop valve 11, the third electric stop valve 15, and the sixth electric stop valve 20 are opened, the opening of the first electric regulating valve 12 and the bypass regulating valve 19 are increased, and the hot water circulation pump 2 is started. By charging the nitrogen pressurizer 7 and starting the loop water supply pump 4, the flow through the passive waste heat exchanger 1 is adjusted to the vicinity of the hot side flow specified in the test and assessment working conditions of the passive waste heat exchanger 1 by adjusting the opening of the first electric regulating valve 12 and the bypass regulating valve 19;

[0020] Open the fourth electric stop valve 18, start the water tank cooling pump 5, and adjust the flow rate in the cooling water tank cooler 7 to near the calculated value by adjusting the second electric regulating valve 17;

[0021] After the cold state debugging is completed, the electric heater 3 is started, and the electric power is adjusted to the rated heat exchange capacity of the heat exchanger specified in the test and assessment working condition of the passive waste heat exchanger 1 by adjusting the power, and the hot side temperature of the passive waste heat exchanger 1 is gradually increased. When the second temperature sensor 25 reaches the hot side temperature of the heat exchanger specified in the test and assessment working condition of the passive waste heat exchanger 1, the temperature in the cooling water tank 29 is adjusted to the cold side medium temperature specified in the test and assessment working condition of the passive waste heat exchanger 1 by adjusting the opening of the second electric regulating valve 17;

[0022] When the parameters of the second temperature sensor 25 and the third temperature sensor 26 are stable, the system basically reaches the test and assessment conditions specified for the passive waste heat exchanger 1. At this time, the required test parameters are obtained through the second flow meter 22, the first temperature sensor 24, the second temperature sensor 25, and the third temperature sensor 26 parameters, and the heat exchange power of the passive waste heat exchanger 1 is calculated.

[0023] The beneficial effects of the above embodiments of the present invention include:

[0024] The hot side test circuit of the water-water passive exhaust heat exchanger placed in the cooling water tank proposed in the above embodiment of the present invention is simple in principle, quick to set up, and highly reusable. The small flow condition of the hot side can be easily adjusted by the common adjustment method of the regulating valve and the bypass system. By setting the heat exchanger in the cooling water tank, the temperature condition of the medium on the cold side of the heat exchanger can be easily controlled and adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings illustrate generally, by way of example and not limitation, various embodiments discussed herein.

[0026] Figure 1 It is a structural schematic diagram of a thermal testing device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank according to an embodiment of the present invention.

[0027] Explanation of symbols:

[0028] 1- passive waste heat exchanger, 2- hot water circulation pump, 3- electric heater, 4- loop water supply pump, 5- water tank cooling pump, 6- cooling water tank cooler, 7- nitrogen regulator, 8- loop water supply tank, 9- multi-functional test auxiliary water tank, 10- first check valve, 11- first electric stop valve, 12- first electric regulating valve, 13- second check valve, 14- second electric stop valve, 15- third electric stop valve, 16- third check valve, 17- second electric regulating valve, 18- fourth electric stop valve, 19- bypass regulating valve, 20- sixth electric stop valve, 21- first flow meter, 22- second flow meter, 23- third flow meter, 24- first temperature sensor, 25- second temperature sensor, 26- third temperature sensor, 27- fourth temperature sensor, 28- fifth temperature sensor, 29- cooling water tank, 30- seventh electric stop valve, 31- eighth electric stop valve. DETAILED DESCRIPTION

[0029] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0030] In the embodiments of the present application, it should be noted that, unless otherwise specified and limited, the term "connection" should be understood in a broad sense. For example, it can be an electrical connection or a connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0031] It should be noted that the terms "first\second\third" involved in the embodiments of the present application are only used to distinguish similar objects, and do not represent a specific order for the objects. It is understandable that the specific order or sequence of "first\second\third" can be interchanged where permitted. It should be understood that the objects distinguished by "first\second\third" can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0032] The patent of this invention belongs to the field of ship power technology, and specifically relates to a thermal testing scheme for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank. It can be applied to the thermal-hydraulic testing of a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank, and can be used as a reference for thermal-hydraulic testing of other types of water-water circulation natural circulation heat exchangers.

[0033] The following is combined with Figure 1 The embodiments of the present invention are described in detail. Figure 1It is a structural schematic diagram of a thermal testing device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank according to an embodiment of the present invention.

[0034] The embodiment of the present invention provides a thermal test device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank, such as Figure 1 As shown, the test device includes:

[0035] Passive waste heat exchanger 1, hot water circulation pump 2, electric heater 3, loop water supply pump 4, water tank cooling pump 5, cooling water tank cooler 6, nitrogen pressure stabilizer 7, loop water supply tank 8, multifunctional test auxiliary water tank 9, first check valve 10, first electric stop valve 11, first electric regulating valve 12, second check valve 13, second electric stop valve 14, third electric stop valve 15, third check valve 16, second electric regulating valve 17, fourth electric stop valve 18, bypass regulating valve 19, sixth electric stop valve 20, first flow meter 21, second flow meter 22, third flow meter 23, first temperature sensor 24, second temperature sensor 25, third temperature sensor 26, fourth temperature sensor 27, fifth temperature sensor 28, seventh electric stop valve 30, eighth electric stop valve 31 and cooling water tank 29.

[0036] The cooling water tank 29 is used to contain cooling liquid, and the passive waste heat exchanger 1 is arranged in the cooling water tank 29. The output end of the passive waste heat exchanger 1, the third electric stop valve 15, the hot water circulation pump 2, the first check valve 10, the first electric stop valve 11, the electric heater 3, the eighth electric stop valve 31, the first electric regulating valve 12, the first flow meter 21, the second flow meter 22, the seventh electric stop valve 30, and the input end of the passive waste heat exchanger 1 are connected in sequence through pipelines, and the pipelines at the output end and the input end of the passive waste heat exchanger 1 are correspondingly connected with the first temperature sensor 24 and the second temperature sensor 25.

[0037] The loop water supply tank 8 is connected to between the first flow meter 21 and the second flow meter 22 through the loop water supply pump 4, the second check valve 13, and the second electric stop valve 14 in sequence.

[0038] The nitrogen pressure regulator 7 is connected between the first flow meter 21 and the second flow meter 22 via the sixth electric stop valve 20 .

[0039] A bypass pipeline provided with a bypass regulating valve 19 is connected between the third electric stop valve 15 and the hot water circulation pump 2 and between the first flow meter 21 and the second flow meter 22 .

[0040] The cooling water tank cooler 7 is arranged in the cooling water tank 29, and is used for cooling the cooling liquid contained in the cooling water tank 29. The output end of the cooling water tank cooler 7, the fourth electric stop valve 18, the third flow meter 23, the multi-functional test auxiliary water tank 9, the water tank cooling pump 5, the third check valve 16, the second electric regulating valve 17, and the input end of the cooling water tank cooler 7 are connected in sequence through pipelines, and the pipelines at the output end and the input end of the cooling water tank cooler 7 are correspondingly connected with the fifth temperature sensor 28 and the fourth temperature sensor 27.

[0041] The cooling water tank 29 is connected to a third temperature sensor 26 for detecting the temperature of the cooling liquid contained in the cooling water tank 29 .

[0042] According to the rated heat exchange rate of the heat exchanger specified in the test and assessment conditions of the passive waste heat exchanger 1, configure the electric heater 3 and cooling water tank cooler 7 of appropriate capacity. The capacity of the electric heater should be more than twice the rated heat exchange rate of the passive waste heat exchanger 1, and the heat exchange rate of the cooling water tank cooler 7 should be higher than the rated heat exchange rate of the passive waste heat exchanger 1. According to the hot side flow rate specified in the test and assessment conditions of the passive waste heat exchanger 1, configure a suitable water tank cooling pump 5. According to the pressure parameters specified in the test and assessment conditions of the passive waste heat exchanger 1, configure a suitable loop water supply pump 4, the design pressure of the nitrogen regulator 7, and the outlet pressure of the loop water supply pump 4 should be higher than the pressure specified in the test and assessment conditions of the passive waste heat exchanger 1.

[0043] In some embodiments, the rated heat exchange capacity of the electric heater 3 is greater than twice the rated heat exchange capacity of the passive exhaust heat exchanger 1 .

[0044] In some embodiments, the rated heat exchange capacity of the cooling water tank cooler 7 is greater than the rated heat exchange capacity of the passive exhaust heat exchanger 1 .

[0045] An embodiment of the present invention provides a test method, based on a thermal test device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank as in any of the above embodiments, the method comprising:

[0046] When the passive waste heat exchanger 1 is tested and assessed, it is first debugged in a cold state, the first electric stop valve 11, the third electric stop valve 15, and the sixth electric stop valve 20 are opened, the opening of the first electric regulating valve 12 and the bypass regulating valve 19 are increased, the hot water circulation pump 2 is started, and the flow through the passive waste heat exchanger 1 is adjusted to near the hot side flow specified in the test and assessment working conditions of the passive waste heat exchanger 1 by charging the nitrogen pressurizer 7 and starting the loop water supply pump 4 by adjusting the opening of the first electric regulating valve 12 and the bypass regulating valve 19.

[0047] The fourth electric stop valve 18 is opened, the water tank cooling pump 5 is started, and the flow rate in the cooling water tank cooler 7 is adjusted to be close to the calculated value by adjusting the second electric regulating valve 17 .

[0048] After the cold state debugging is completed, start the electric heater 3, adjust the electric power to the rated heat exchanger of the heat exchanger specified in the test and assessment conditions of the passive waste heat exchanger 1 by adjusting the power, and gradually increase the hot side temperature of the passive waste heat exchanger 1. When the second temperature sensor 25 reaches the hot side temperature of the heat exchanger specified in the test and assessment conditions of the passive waste heat exchanger 1, adjust the temperature in the cooling water tank 29 to the cold side medium temperature specified in the test and assessment conditions of the passive waste heat exchanger 1 by adjusting the opening of the second electric regulating valve 17.

[0049] When the parameters of the second temperature sensor 25 and the third temperature sensor 26 are stable, the system basically reaches the test and assessment conditions specified for the passive waste heat exchanger 1. At this time, the required test parameters are obtained through the second flow meter 22, the first temperature sensor 24, the second temperature sensor 25, and the third temperature sensor 26, and the heat exchange power of the passive waste heat exchanger 1 is calculated.

[0050] In the embodiment of the present invention, the passive exhaust heat exchanger 1 is the target device for the test. The multifunctional test auxiliary water tank 9 has the function of an air cooling tower.

[0051] The present invention proposes a thermal test scheme for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank. The test scheme includes a passive exhaust heat exchanger, a hot water circulation pump, an electric heater, a voltage stabilizer, a loop water supply tank, a loop water supply pump, a cooling water tank, a cooling water tank cooler, a water tank cooling pump, pipelines, an insulation layer and other pipeline accessories. The specific description is as follows:

[0052] In the above-mentioned embodiment of the present invention, the flow and temperature conditions on the hot side of the passive exhaust heat exchanger are realized by a set of electric heating and nitrogen pressure stabilization test circuits.

[0053] In the above-mentioned embodiment of the present invention, the small flow condition on the hot side of the passive exhaust heat exchanger is achieved by the regulating valve and the bypass branch, wherein the bypass branch contributes to a greater flow regulation effect.

[0054] In the above embodiment of the present invention, the temperature of the medium on the cold side of the passive exhaust heat exchanger is controlled by the cooling heat exchanger arranged inside the cooling water tank. The corresponding cooling heat exchanger is configured according to the designed heat exchange capacity of the passive exhaust heat exchanger. The heat exchange capacity of the cooling heat exchanger is adjusted by the temperature measurement condition arranged inside the cooling water tank. If necessary, it is possible to consider dispersing multiple cooling heat exchangers on both sides of the water tank to achieve the stability of the medium temperature in the cooling water tank. The cooling water tank is coated with thermal insulation material to reduce external heat dissipation and enhance the effect of stable control of the medium temperature in the cooling water tank.

[0055] The hot side test circuit of the water-water passive exhaust heat exchanger placed in the cooling water tank proposed in the embodiment of the present invention is simple in principle, quick to set up, and highly reusable. The small flow condition of the hot side can be easily adjusted by the common adjustment method of the regulating valve and the bypass system. By setting the heat exchanger in the cooling water tank, the temperature condition of the medium on the cold side of the heat exchanger can be easily controlled and adjusted.

[0056] The technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0057] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A thermal test device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank, characterized in that: The test device comprises: Passive waste heat exchanger (1), hot water circulation pump (2), electric heater (3), loop water supply pump (4), water tank cooling pump (5), cooling water tank cooler (6), nitrogen pressure stabilizer (7), loop water supply tank (8), multifunctional test auxiliary water tank (9), first check valve (10), first electric stop valve (11), first electric regulating valve (12), second check valve (13), second electric stop valve (14), third electric stop valve (15), third check valve (16), second electric regulating valve (17), fourth electric stop valve (18), bypass regulating valve (19), sixth electric stop valve (20), first flow meter (21), second flow meter (22), third flow meter (23), first temperature sensor (24), second temperature sensor (25), third temperature sensor (26), fourth temperature sensor (27), fifth temperature sensor (28), seventh electric stop valve (30), eighth electric stop valve (31) and cooling water tank (29); The cooling water tank (29) is used to contain cooling liquid. The passive waste heat exchanger (1) is arranged in the cooling water tank (29). The output end of the passive waste heat exchanger (1), the third electric stop valve (15), the hot water circulation pump (2), the first check valve (10), the first electric stop valve (11), the electric heater (3), the eighth electric stop valve (31), the first electric regulating valve (12), the first flow meter (21), the second flow meter (22), the seventh electric stop valve (30), and the input end of the passive waste heat exchanger (1) are connected in sequence through pipelines. The pipelines at the output end and the input end of the passive waste heat exchanger (1) are connected to the first temperature sensor (24) and the second temperature sensor (25) respectively. The loop water supply tank (8) is connected to between the first flow meter (21) and the second flow meter (22) through the loop water supply pump (4), the second check valve (13), and the second electric stop valve (14) in sequence; The nitrogen pressure regulator (7) is connected to between the first flow meter (21) and the second flow meter (22) via the sixth electric stop valve (20); A bypass pipeline provided with a bypass regulating valve (19) is connected between the third electric stop valve (15) and the hot water circulation pump (2) and between the first flow meter (21) and the second flow meter (22); The cooling water tank cooler (7) is arranged in the cooling water tank (29) and is used to cool the cooling liquid contained in the cooling water tank (29); the output end of the cooling water tank cooler (7), the fourth electric stop valve (18), the third flow meter (23), the multifunctional test auxiliary water tank (9), the water tank cooling pump (5), the third check valve (16), the second electric regulating valve (17), and the input end of the cooling water tank cooler (7) are connected in sequence through pipelines; the pipelines at the output end and the input end of the cooling water tank cooler (7) are correspondingly connected to the fifth temperature sensor (28) and the fourth temperature sensor (27); The cooling water tank (29) is connected to the third temperature sensor (26) for detecting the temperature of the cooling liquid contained in the cooling water tank (29).

2. The thermal test device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank according to claim 1 is characterized in that: The rated heat exchange capacity of the electric heater (3) is greater than twice the rated heat exchange capacity of the passive waste heat exchanger (1).

3. The thermal test device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank according to claim 1 is characterized in that: The rated heat exchange capacity of the cooling water tank cooler (7) is greater than the rated heat exchange capacity of the passive waste heat exchanger (1).

4. A test method, characterized in that: Based on the thermal testing device for a high-temperature and high-pressure water-water passive exhaust heat exchanger placed in a cooling water tank as described in any one of claims 1 to 3, the method comprises: When the passive waste heat exchanger (1) is tested and assessed, it is first debugged in a cold state, the first electric stop valve (11), the third electric stop valve (15), and the sixth electric stop valve (20) are opened, the openings of the first electric regulating valve (12) and the bypass regulating valve (19) are increased, the hot water circulation pump (2) is started, and the flow through the passive waste heat exchanger (1) is adjusted to the vicinity of the hot side flow specified in the test and assessment working conditions of the passive waste heat exchanger (1) by charging the nitrogen pressure stabilizer (7) and starting the loop water supply pump (4) by adjusting the openings of the first electric regulating valve (12) and the bypass regulating valve (19); Open the fourth electric stop valve (18), start the water tank cooling pump (5), and adjust the flow rate in the cooling water tank cooler (7) to a value close to the calculated value by adjusting the second electric regulating valve (17); After the cold state debugging is completed, the electric heater (3) is started, and the electric power is adjusted to the rated heat exchange capacity of the heat exchanger specified in the test and assessment working condition of the passive waste heat exchanger (1) by adjusting the power, and the hot side temperature of the passive waste heat exchanger (1) is gradually increased. When the second temperature sensor (25) reaches the hot side temperature of the heat exchanger specified in the test and assessment working condition of the passive waste heat exchanger (1), the temperature in the cooling water tank (29) is adjusted to the cold side medium temperature specified in the test and assessment working condition of the passive waste heat exchanger (1) by adjusting the opening of the second electric regulating valve (17); When the parameters of the second temperature sensor (25) and the third temperature sensor (26) are stable, the system basically reaches the test and assessment conditions specified for the passive waste heat exchanger (1). At this time, the required test parameters are obtained through the second flow meter (22), the first temperature sensor (24), the second temperature sensor (25), and the third temperature sensor (26), and the heat exchange power of the passive waste heat exchanger (1) is calculated.

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