A liquid metal lithium physical property parameter testing system and testing method thereof

Abstract

The invention provides a liquid metal lithium physical property parameter testing system and a testing method thereof. The testing system includes: a lithium filling system, an argon gas and vacuum system, a test section body, and an online monitoring system; wherein the lithium filling system includes a molten lithium tank, Lithium recovery tank; the test section body includes lithium density and surface tension test sections, lithium viscosity test sections, lithium enthalpy and heat capacity test sections; the online monitoring system monitors and collects various key parameters in the system and the opening and closing of lithium valves in real time. The test method uses the above-mentioned test system, including four steps of argon filling the loop, lithium filling the loop, physical property parameter testing, and system shutdown.

Description

technical field [0001] The invention belongs to the subject field of engineering thermophysics and energy utilization, and more specifically relates to a liquid metal lithium physical property parameter testing system and a using method. Background technique [0002] With the continuous development of deep space exploration, the space nuclear power supply system has been regarded as the most potential power source for future space exploration, with the advantages of high energy density and stable performance. High thermal conductivity endows liquid metal with excellent convective heat transfer capability, which breaks the capacity limit of traditional cooling technology using water as the cooling medium. Lithium working medium has relatively high melting point and boiling point, low density and good heat transfer performance. It is used as a coolant for space nuclear reactors, including space reactors directly cooled by liquid metal lithium and space reactors cooled by alkal...

AI Technical Summary

Problems solved by technology

[0003] Due to the strong metallicity and high risk of lithium, it is difficult to test the physical properties of liquid lithium at high temperature with existing technology equipment. In addition, although the existing literature provides experimental data for some physical parameters, there are gaps in the reported results. The difference between the test results and the test errors caused by the limited test conditions in the last century have greatly questioned the test results, which are far from meeting the current application requirements. In order to obtain more reliable data, the applicable temperature range is wider. Therefore, There is a need for more precise measurements

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