Open boiling liquid nitrogen system with liquid nitrogen recovery device

A recovery device and liquid nitrogen technology, applied in the field of open boiling liquid nitrogen system, to achieve the effect of saving test costs, small investment and short cost recovery period

Inactive Publication Date: 2012-07-11
SHANGHAI AEROSPACE SYST ENG INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to reduce the test cost and solve the problem of gas-liquid separation and recovery of the small open boiling liquid nitrog

Method used

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  • Open boiling liquid nitrogen system with liquid nitrogen recovery device
  • Open boiling liquid nitrogen system with liquid nitrogen recovery device
  • Open boiling liquid nitrogen system with liquid nitrogen recovery device

Examples

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Embodiment Construction

[0010] figure 1 It is a schematic structural diagram of a traditional open boiling liquid nitrogen system. The device includes: a liquid nitrogen storage tank 1 sends liquid nitrogen to a thermal vacuum environment simulation device 2 through a low temperature system pipeline, and then empties it through a vent pipeline. Its working principle is: the liquid nitrogen in the system enters the heat sink of the thermal vacuum environment simulation equipment 2 from the liquid storage tank 1 through the low-temperature system pipeline, and then is directly emptied through the vent pipeline, and the liquid nitrogen in the system is gasified in a large amount during the flow process , take away the heat radiated from the test piece in the system and the simulator to the heat sink through the phase change heat.

[0011] Due to the low cost performance of recovery, the existing technology usually discharges the gas-liquid two-phase nitrogen at the outlet of the system directly to the a...

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Abstract

The invention relates to space environment simulation equipment, and discloses an open boiling liquid nitrogen system with a liquid nitrogen recovery device. The device comprises a liquid nitrogen storage tank which is connected with thermal vacuum environment simulation equipment, and an evacuation pipe is arranged at the output port of the thermal vacuum environment simulation equipment. According to the invention, the device also comprises a gas-liquid separation filling shift device which is arranged on the evacuation pipe. The equipment in the invention can be used for solving the problem of recovery in gas-liquid separation of small open boiling liquid nitrogen systems, and has the characteristics of being low in investment, short in cost recovering cycle and improved in working conditions.

Description

technical field [0001] The invention relates to space environment simulation equipment, in particular to an open boiling liquid nitrogen system with a liquid nitrogen recovery device. Background technique [0002] In the space environment simulation test, for the thermal vacuum test, a large amount of cryogenic working fluid such as liquid nitrogen is required in the test. Because the thermal vacuum test cycle is quite long, it consumes a lot of manpower, material resources and financial resources. For example, a large-scale space environment simulator consumes about ten tons of liquid nitrogen per day, and sometimes the cost of purchasing liquid nitrogen for one experiment can reach millions of yuan. [0003] Large-scale liquid nitrogen systems are usually equipped with nitrogen recovery and reliquefaction systems. The US "Mark 1" environmental simulator, OUNEX's SOPEMEA thermal vacuum chamber, Nippon Sanso's φ14m space simulator and other liquid nitrogen systems, and the...

Claims

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Application Information

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IPC IPC(8): B01D19/00B01L7/00
Inventor 张良俊
Owner SHANGHAI AEROSPACE SYST ENG INST
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