Straight cylindrical liquid-nitrogen liquid-helium double-medium compatible heat sink device and refrigeration method thereof

Abstract

The invention relates to a straight cylindrical liquid-nitrogen liquid-helium double-medium compatible heat sink device and a refrigeration method thereof. The heat sink device comprises a heat sink main body, heat sink surface resistance temperature sensors, an auxiliary liquid drainage pipeline, a liquid-nitrogen supply system, a gas-nitrogen blow-off system, a gas-helium blow-off system and a liquid-helium supply system, wherein the heat sink main body is in a double fishbone type structure and is provided with a skeleton, a liquid-nitrogen heat sink and a liquid-helium heat sink; the liquid-helium heat sink is arranged inside the liquid-nitrogen heat sink; the heat sink surface resistance temperature sensors are uniformly distributed on the surfaces of the liquid-nitrogen and liquid-helium heat sinks; the liquid-nitrogen supply system, the gas-nitrogen blow-off system, the gas-helium blow-off system, the liquid-helium supply system and the auxiliary liquid drainage pipeline are all connected to an inlet of the liquid-helium heat sink; and the liquid-nitrogen supply system is further connected to the inlet of the liquid-nitrogen heat sink. The refrigeration method for the device comprises the following steps: in the working process, refrigerating the liquid-nitrogen heat sink by directly introducing the liquid nitrogen into the liquid-nitrogen heat sink, and then refrigerating the liquid-helium heat sink by introducing the liquid nitrogen and then introducing the liquid helium into the liquid-helium heat sink. By using the heat sink device and the refrigeration method provided by the invention, one heat sink channel is shared by the liquid nitrogen and the liquid helium, the requirement of plume test for engine is met, and the test cost is lowered.

Description

technical field [0001] The invention relates to a component of a low-temperature process system used for space environment simulation test equipment and engine plume test equipment, in particular to a straight cylindrical liquid nitrogen and liquid helium dual-medium compatible heat sink device and a refrigeration method thereof. Background technique [0002] The space environment simulation test equipment and the engine plume test equipment are all equipment for simulating the space vacuum and low temperature environment. The heat sink is the main part of this type of equipment, and provides the required ambient temperature and vacuum degree for the equipment test space through radiative heat exchange. , in order to achieve this goal, the temperature of the heat sink must be controlled, and the control of the temperature of the heat sink is realized by forcing the heat transfer medium to flow in the heat sink channel and exchanging heat with the heat sink. [0003] Accordin...

AI Technical Summary

Problems solved by technology

But no matter what medium is used, the current heat sink is a single-medium flow channel, and the flow channel of the heat sink can only circulate one heat transfer medium, and cannot switch to another medium

The main reason is that the freezing point of each refrigeration medium is different. Taking liquid helium and liquid nitrogen as examples, when liquid helium is passed into the flow channel of the heat sink that circulates through the liquid nitrogen, the liquid nitrogen remaining in the flow channel will be frozen. solid, block or even damage the heat sink, so there is no ultra-low temperature heat sink flow channel that shares the two refrigerants of liquid nitrogen and liquid helium before

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