Liquid nitrogen and cold helium double media coupling heat sink for space environment simulation

Abstract

The invention discloses a liquid nitrogen and cold helium double media coupling heat sink for space environment simulation. The heat sink is a sealed cylinder which comprises a liquid nitrogen cooling pipe network, a cold air helium cooling pipe network, copper fins and electric heaters, wherein the copper fins are connected with the liquid nitrogen cooling pipe network and the cold air helium cooling pipe network and forms a barrel of the liquid nitrogen and cold helium double media coupling heat sink with the liquid nitrogen cooling pipe network and the cold air helium cooling pipe network. The electric heaters are uniformly distributed on the copper fins. According to the heat sink disclosed by the invention, the liquid nitrogen cooling pipe network and the cold air helium cooling pipe network are embedded and coupled, so that refrigerating media liquid nitrogen and cold helium work independently to switch in function smoothly, thereby, realizing transition from a liquid nitrogen temperature area to a low temperature gas helium temperature area. In addition, according to design of two parallel and staggered medium pipelines with two runners, conditions of complex flow, reduced safety, discontinuous transition of the temperature area and waste of cooling capacity caused by emptying switch of a single runner can be avoided. The heat sink disclosed by the invention is simple in operational flow and safe and reliable.

Description

technical field [0001] The invention relates to a heat sink, in particular to a liquid nitrogen-cooled helium double-medium coupled heat sink for space environment simulation. Background technique [0002] The space environment simulation system simulates the vacuum and cold dark environment of the universe. It is an important equipment for testing the safety and reliability of aerospace equipment and its components in the space environment. The environment simulation cabin is the core component of the system. In addition to the shell and heat insulation methods in the environmental simulation cabin, the cold and heat sources in the cabin are generally completed through the heat sink. The heat sink provides the required temperature environment for the equipment under test through radiation heat transfer and other forms. To achieve this purpose, the temperature of the heat sink must be controlled. The control of the temperature of the heat sink is realized by the forced flow...

AI Technical Summary

Problems solved by technology

Due to the high price of liquid helium, the system is not only expensive to manufacture but also expensive to operate, so it is not suitable for long-running tasks such as survivability tests, and this heat sink cannot achieve high-temperature environmental conditions above normal temperature

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