Variable-heat-conductivity-coefficient vacuum environment liquid metal cooler

Abstract

The invention relates to a variable-heat-conductivity-coefficient vacuum environment liquid metal cooler. The variable-heat-conductivity-coefficient vacuum environment liquid metal cooler comprises a liquid metal pipeline, a heat conduction gas cavity and a cooling water assembly. The heat conduction gas cavity wraps at least one part of the liquid metal pipeline so as to adjust heat dissipation of the liquid metal pipeline through change of the heat conductivity coefficient of the heat conduction gas cavity. A cooling water flow channel of the cooling water assembly is arranged in the heat conduction gas cavity so as to adjust the background temperature. The variable-heat-conductivity-coefficient vacuum environment liquid metal cooler has the beneficial effects that the variable-heat-conductivity-coefficient vacuum environment liquid metal cooler effectively and fully utilizes three heat exchange means of heat conduction, radiation and convection, so that the working temperature range of the cooler is very wide, the cooler can work within the range of dozens of DEG C to 600 DEG C under the condition that the flow of cooling water is enough, and the performance test requirements of a thermal vacuum electromagnetic pump in a vacuum environment are met. The variable-heat-conductivity-coefficient vacuum environment liquid metal cooler is good in adjustability and multiple in adjusting means, and the heat exchange capacity can be changed by adjusting the water temperature and the flow speed of the secondary cooling water inlet and the existence and components of gas in the gas cavity.

Description

technical field [0001] The invention belongs to the field of nuclear industry, and in particular relates to a liquid metal cooler in a vacuum environment with variable thermal conductivity. Background technique [0002] During the hydraulic performance test of the thermal vacuum electromagnetic pump, it is necessary to use the circuit to carry out the performance test of the full working temperature range in a vacuum environment. Taking the small NaK thermal vacuum electromagnetic pump developed by the China Institute of Atomic Energy as an example, it needs to be at least 125°C-525°C Within the range, the performance test is carried out at intervals of 100°C, and during the test, it is necessary to ensure that the temperature change of the liquid metal working fluid is ≤ 2.5°C. [0003] In a vacuum environment, the only way for an object to dissipate heat is thermal radiation. The radiation capacity is proportional to the 4th power of the thermodynamic temperature of the ob...

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There is a lack of technical solutions that can realize this function in the prior art

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