リザーバ内蔵ループ形ヒートパイプの熱特性に関する研究: きく8号搭載展開型ラジエータの軌道上熱輸送特性

摘要

As heat generation in satellites increases, securing sufficient radiator panel area is an important problem. Deployable radiator, whose radiator panels are deployed post-launch in space to increase the effective radiator panel area of the satellite, is becoming an important thermal control technology. Reservoir Embedded Loop Heat Pipe (RELHP) is applied to the deployable radiator for heat transport device. Deployable radiator for use on Kiku-8 was launched on December 18, 2006 and was injected to the geostationary orbit. It is still in operation without any significant issues since its launch over two years ago. This paper presents the heat transport characteristics of RELHP for use on deployable radiator under geostationary orbital environment. RELHP has been succeeded in start-up under micro gravity environment. Furthermore, it was found that, in case of under micro gravity environment sub-cooling region length is shorter than under gravity environment, because of heat leak into reservoir decreases under micro gravity environment.%衛星の高発熱化に伴い放熱面積の確保が重要な課題rnであり，打ち上げ後宇宙空間でラジエータパネルを展rn開して衛星の実効放熱面積を増加させる展開型ラジエrnータが重要な熟制御技術となっている．展開型ラジエrnータでは，衛星内の熱を放熱面であるラジエータパネrnルへ輸送する必要があるため，ラジエータを展開するrnためのヒンジ部において，柔軟な配管を介して熱を輸rn送できる熱輸送素子が必要不可欠である．