Power-adjustable space radiation heat dissipation system and working method thereof

Abstract

The invention discloses a power-adjustable space radiation heat dissipation system and a working method thereof, and belongs to the field of energy comprehensive utilization. The system is characterized in that a magnetofluid power generation device arranged in a coolant pipeline is connected to direct-current electromagnets arranged in a radiation radiator fin through a wire and a switch so as tosupply power to the electromagnets; the direct-current electromagnets attract permanent magnets in a fin surface thin film to control the fin surface thin film to be opened and closed; and the effective working area of a radiation radiator is controlled by arranging and adjusting a circuit, so that the purpose of adjusting the radiating power of the heat pipe type radiation radiator is achieved.According to the adopted multi-gear heat pipe type space radiation heat dissipation system, the service life of a control device power supply is long, the radiation heat dissipation effect adjustmentcapability is good, the stability and adaptability of a space nuclear-power power supply system can be remarkably improved, and the requirement of long-term flight of a spacecraft can be well met.

Description

technical field [0001] The invention relates to a heat pipe type space radiation cooling system and its working method, in particular to a power-adjustable space radiation cooling system and its working method, belonging to the field of comprehensive energy utilization. Background technique [0002] At present, the thermoelectric conversion efficiency of nuclear power sources in space is low, and the general thermoelectric conversion efficiency in nuclear power sources is only 5% to 10%. To obtain more electric energy means that more waste heat needs to be discharged to the outside, while in the universe , heat exchange through heat radiation is the only way to dissipate heat, so an efficient and adjustable heat radiation cooling device is a must. [0003] The heat pipe is one of the most effective heat transfer elements known to the people. It can transmit a large amount of heat through a small cross-sectional area without external power. In the closed heat pipe, the heat p...

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Problems solved by technology

The fins of different materials are attached to the condensation section of the heat pipe by brazing or bonding, and the heat is transferred to the fins through heat conduction, and then the heat is radiated to the outer space by the fins with a high emissivity surface. The general heat dissipation method of the system, when the power of the nuclear reactor changes, the required heat dissipation power will also change accordingly. If the required heat dissipation power is lower than the design power of the radiation radiator, it may cause heat dissipation in the heat pipe. The freezing of the working fluid is unfavorable for the radiation radiator, which will increase the time required for the next start-up of the heat pipe. At present, the radiation radiators of nuclear power sources in space vehicles all have a fixed radiation area, so they do not The heat dissipation power of the radiation radiator cannot be actively adjusted, and when the power of the nuclear reactor changes, the heat dissipation power of the radiation radiator cannot be controlled according to the demand

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