Satellite-borne composite heat dissipation system and control method thereof

Abstract

The invention discloses a satellite-borne composite heat dissipation system and a control method thereof. An evaporator is sequentially connected with a gas-liquid separator, a compressor, a radiation radiator and a throttling branch through a refrigerant pipeline. The throttling branch and a bypass branch are arranged in parallel. The throttling branch is provided with a throttling device. The bypass branch is provided with a bypass valve, and the compressor is a mini-type oil-free frequency conversion compressor. A controller collects the surface temperature of heating equipment and controls the compressor, the throttling device and the bypass valve. Under the situation of different solar radiation and heating equipment loads, according to the surface temperature of the heating equipment, the system can achieve two work modes that when the solar radiation is too strong or heat dissipation loads of the electronic equipment are large, the compressor runs at a high speed, the throttling device works, the steam compression cycle is formed, and heat dissipation safety is guaranteed; and when the solar radiation is weak and the heat dissipation loads of the electronic equipment are small, the compressor runs at the low pressure and with the low speed, the throttling device is bypassed, the power heat pipe cycle is constructed, and the requirement for heat transfer on the basis of energy saving is met.

Description

[0001] Technical field: [0002] The invention relates to a space-borne composite heat dissipation system and a control method thereof, which are suitable for heat dissipation of equipment with high heat flux density on satellites, and belong to the field of aerospace environment control. [0003] Background technique: [0004] Traditional space-borne high-heating equipment generally uses single-phase or two-phase fluids (heat pipes) to circulate through radiation radiators to dissipate heat to space. However, with the rapid development of high-frequency, integrated, and high-power electronic equipment, the heating power of electronic equipment Geometrically increasing, the traditional natural heat transfer method requires a larger and larger radiation radiator area, but it is still difficult to meet the heat dissipation requirements when the solar radiation is strong, which brings hidden dangers to the safe and reliable operation of electronic equipment. Based on this, the spa...

AI Technical Summary

Problems solved by technology

However, there is no gravity on the spaceborne platform, the heat pipe cycle lacks the driving force and it is difficult to operate, and the frequent start and stop of the compressor when switching between the heat pipe mode and the vapor compression mode brings hidden dangers to the reliability of the unit, and there is no specific implementation plan and control plan for the space environment

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