CN-121994865-A - Thermal performance testing system and method for intermittent heat source heat storage tank of fusion device

Abstract

The invention discloses a thermal performance test system and a thermal performance test method for an intermittent heat source heat storage tank of a fusion device, which belong to the technical field of performance detection of core equipment of an energy storage system of the fusion device. The testing method adopts a double-tank circulation flow, combines automatic control to realize accurate reproduction of the charging/discharging process, and supports waste heat utilization to improve energy efficiency. The invention fills the technical blank of thermal performance test of the heat storage tank under the fusion intermittent heat source, and can provide experimental basis for the design and operation strategy optimization of the efficient heat storage tank.

Inventors

• LI XUE
• LI ZHAOJUN
• DING RUI
• ZHAO ZHILI

Assignees

• 聚变新能(安徽)有限公司
• 中国科学院合肥物质科学研究院

Dates

Publication Date

20260508

Application Date

20260409

Claims (10)

1. 1. A thermal performance test system of an intermittent heat source heat storage tank of a fusion device is characterized by comprising a heat storage tank operation system for simulating the operation of the heat storage system of the fusion device, an auxiliary heating system for heating the heat storage tank operation system and a test control system, wherein the heat storage tank operation system comprises a first test tank, a second test tank, a heat source simulated electric heater, a first pump, a second pump, a first valve and a second valve, an inlet of the first test tank is connected with an outlet of the heat source simulated electric heater, an inlet of the heat source simulated electric heater is connected with an outlet of the first pump, an inlet of the first pump is connected with an outlet of the second test tank through the first valve, an inlet of the second test tank is connected with an outlet of the first test tank through the second valve, the auxiliary heating system comprises a storage tank heater and a storage tank electric tracing heat which are respectively arranged in the first test tank and the second test tank and on the side wall, and a pipeline electric tracing heat which is arranged on the outer surface of a connecting pipeline, and the test control system comprises a plurality of test tank temperature test sets which are respectively arranged in the first test tank and the second test tank, a plurality of test tank temperature test tanks which are respectively arranged on the first test tank and the pipeline outlet of the second test tank and the pipeline, a plurality of test tank and a liquid level meter which are respectively arranged on the first test tank and the pipeline and a second test tank.
2. 2. The intermittent heat source heat storage tank thermal performance test system of a fusion device according to claim 1, wherein the first test tank and the second test tank are internally provided with test tank temperature test groups at least comprising nine temperature measuring points, the temperature measuring points are distributed on three vertical sections and three horizontal sections, and the distances between the temperature measuring points in the vertical sections and the horizontal sections are equal.
3. 3. The fusion device intermittent heat source heat storage tank thermal performance test system according to claim 1, wherein the first pump and the second pump are automatic control pumps which are started and stopped under the control of a PLC.
4. 4. The thermal performance test system of the intermittent heat source heat storage tank of the fusion device according to claim 1, wherein the first valve and the second valve are automatic control valves which are controlled to be opened and closed by a PLC.
5. 5. The fusion device intermittent heat source heat storage tank thermal performance test system according to claim 1, wherein the geometric dimensions of the first test tank and the second test tank are obtained by scaling in equal proportion according to the ratio of the diameter to the height of an actual heat storage tank of the fusion device heat storage system.
6. 6. A fusion device intermittent heat source heat storage tank thermal performance test method, adopting the fusion device intermittent heat source heat storage tank thermal performance test system as claimed in any one of claims 1 to 5, comprising: The first pump and the first valve are started, so that the molten salt flows into the first test tank to a set liquid level, and then the auxiliary heating system is closed; When the thermal performance test of the low-temperature heat storage tank is carried out, a second pump and a second valve are opened, the opening of the first valve and the opening of the second valve are regulated, molten salt flows back to the second test tank from the first test tank when the second test tank flows to the first test tank through the heat source simulated electric heater at a set mass flow rate, the heat storage duration t1 is continuously operated, t1 is the heat storage duration of the heat storage system of the fusion device, the first pump and the first valve are closed, the backflow of the molten salt from the first test tank to the second test tank is only maintained, the heat release duration t2 is continuously operated, t2 is the duration of independent heat release of the heat storage system of the fusion device, and the internal temperature distribution and the outlet temperature data of the corresponding second test tank are continuously acquired in the stages t1 and t2 respectively; When the thermal performance test of the high-temperature heat storage tank is carried out, an auxiliary heating system is started, when all temperature measuring point temperatures of a testing tank temperature testing group of a first testing tank reach the upper limit value of the heat storage temperature of the heat storage system of the fusion device and all temperature measuring point temperatures of the testing tank temperature testing group of a second testing tank reach the lower limit value of the heat storage temperature of the heat storage system of the fusion device, a second pump and a second valve are started, simultaneously the opening degree of the first valve and the opening degree of the second valve are regulated, so that molten salt flows into an inlet of the first testing tank from an outlet of the second testing tank at a set mass flow rate, flows into an inlet of the second testing tank from an outlet of the first testing tank, simultaneously a heat source simulation electric heater is started, the heat storage system is continuously operated for a period of time t1, then the first valve and the first pump are closed, only molten salt flows back to the second testing tank from the first testing tank, the heat storage system is continuously operated for a period of time t2, and the internal temperature distribution and outlet temperature data of the first testing tank are continuously collected at the stages t1 and t2 respectively.
7. 7. The method for testing the thermal performance of the intermittent heat source heat storage tank of the fusion device according to claim 6, wherein in the thermal performance test of the low-temperature heat storage tank, the heat source simulated electric heater does not start heating and is only used as a circulating channel of molten salt.
8. 8. The method for testing the thermal performance of an intermittent heat source heat storage tank of a fusion device according to claim 6, wherein in the thermal performance test of the high-temperature heat storage tank, a first test tank is heated to an upper limit value of the heat storage temperature of a heat storage system of the fusion device by electric heat tracing of a first storage tank heater in the first test tank and a first storage tank on the outer side wall of the first test tank, and a second test tank is maintained at a lower limit value of the heat storage temperature of the heat storage system of the fusion device by electric heat tracing of a second storage tank heater in the second test tank and a second storage tank on the outer side wall of the second test tank.
9. 9. The method for testing the thermal performance of an intermittent heat source heat storage tank of a fusion device according to claim 8, wherein in the process of testing the thermal performance of the high temperature heat storage tank, the heating power of the heat source simulated electric heater is adjusted in real time according to the outlet temperature and the inlet mass flow of the heat source simulated electric heater so as to maintain the outlet temperature of the heat source simulated electric heater to be constant at the upper limit value of the heat storage temperature of the heat storage system of the fusion device.
10. 10. The method for testing the thermal performance of the intermittent heat source heat storage tank of the fusion device according to claim 6, wherein after the testing is finished, a third valve and a third pump connected with a liquid outlet of the second testing tank are opened, and molten salt is discharged into salt thinning equipment.

Description

Thermal performance testing system and method for intermittent heat source heat storage tank of fusion device Technical Field The invention belongs to the technical field of performance detection of core equipment of an energy storage system of a fusion device, and particularly relates to a thermal performance test system and method of an intermittent heat source heat storage tank of the fusion device. Background With the development of controlled nuclear fusion energy technology, fusion stacks are gradually advancing from a physical experiment stage to an engineering demonstration and commercial application stage as an advanced energy device with high energy density, low carbon emission and high safety. In a fusion reactor energy utilization system, high-grade heat energy generated by fusion plasma is usually required to be recovered and utilized through an energy conversion system, wherein an energy storage system is used as a key intermediate link for realizing connection between a heat source and a downstream power generation system, so that the contradiction between intermittent operation of the fusion reactor and the requirement of the power generation system on a stable heat source can be solved, and the stability and the reliable operation life of the system can be improved. Unlike conventional fossil or renewable energy sources, fusion reactor sources have significant intermittent operating characteristics. Fusion stacks are typically operated in a pulsed manner, with an output thermal power exhibiting significant periodic start-stop characteristics on a time scale, with short periods of time therebetween, and with a step change in thermal power. In the operation mode, the heat storage tank is used as core equipment of the energy storage system, not only needs to bear high-temperature working conditions, but also needs to realize heat storage and release under the frequently-changed heat input condition, and the internal heat layering behavior and the heat output performance of the heat storage tank directly influence the heat transfer efficiency of the heat storage system. Therefore, the technology bottleneck of the heat storage tank under the intermittent heat source condition of the fusion reactor is quickened to break through, the efficient heat storage tank for the fusion reactor is researched and developed, and the method has important significance for realizing stable energy conversion of the fusion reactor and propelling engineering application of fusion energy in China. However, the prior art mainly focuses on the air tightness detection, mechanical property test and the like of the heat storage tank, molten salt corrosiveness test and performance coupling test and the like, such as chinese patent application CN201821284758.2 (a high-temperature molten salt storage tank air tightness detection device), chinese patent application CN202411224701.3 (a molten salt storage tank test device and a molten salt storage tank test method), chinese patent application CN202311017152.8 (a high-temperature molten salt corrosion test device and method), chinese patent application CN202111372371.9 (a high-temperature chloride photo-thermal and energy storage circulation simulation experiment platform and experiment method), and the like, and the above patent applications do not focus on the thermal performance of the molten salt heat storage tank of the fusion device, and do not relate to the working condition of an intermittent heat source, so that the performance parameters of the heat storage tank for the fusion device cannot be obtained. Therefore, a thermal performance test system and a corresponding test method for a heat storage tank capable of simulating intermittent operation heat source characteristics of a fusion reactor are needed, and reliable experimental basis and data support can be provided for design optimization and operation strategy formulation of a heat storage system of a fusion device. Disclosure of Invention In order to solve the problem that the thermal performance test of a heat storage tank of a heat storage system core device of a fusion device cannot be realized in the prior art, the invention provides a thermal performance test system and a thermal performance test method of an intermittent heat source heat storage tank of the fusion device, which simulate the intermittent operation characteristics of a fusion reactor heat source, test the temperature distribution of medium inside the high-temperature heat storage tank and the low-temperature heat storage tank and the output temperature change rule of the heat storage tank under the intermittent heat source working condition, obtain the temperature distribution and the heat output rule of the molten salt heat storage tank during the fusion reactor operation and the intermittent period, evaluate the thermal stratification and the output stability of the molten salt heat storage tank and play an important role in the technical