High thermal conductive carbon fiber radiators with controlled Loop Heat Pipes
MetadataShow full item record
Steady demand to SC components with small mass requires persistent design improvement, especially if new materials and technologies are available. Combination of radiator skins made of carbon fibers and Aluminum condenser of Loop Heat Pipe (LHP) is one of new designs of TCS components. In comparison with traditional structural materials carbon-filled plastics differ by such characteristics as low specific mass, high specific strength and stiffness, fatigue stability in exposure to static and dynamic loads, high wear resistance and stability in exposure to corrosive medium, high stability to thermal and radiation shocks. However, current-technology carbon-filled plastics have low linear thermal expansion coefficient and low thermal conductivity. New material developed by us has high thermal conductivity which is achieved by application of high-modular carbon fibers. High difference between values of linear thermal expansion coefficients of carbon-filled plastics and Aluminum LHP condenser did not make it possible to use the advantages of carbon-filled plastics. New carbon-filled plastic developed for thermal honeycomb panels allows to solve this problem. Honeycomb panel radiator developed on the base of controlled LHP application is described in the paper. The radiator skins are made of carbon-filled plastic with ultrahigh thermal conductivity. LHP is intended for controlled cooling of storage batteries and operation systems of the SC. Scope of the radiator qualification tests including autonomous and full-scale tests is presented in the paper. Application of carbon-filled plastic radiator made it possible to decrease the radiator mass by 20 percent in comparison with Aluminum radiator. It could be expected that mass efficiency of large-size radiators made of carbon-filled plastic will be much greater because high thermal conductivity makes it possible to increase distance between condenser lines or increase radiator thermal efficiency without changing condenser configuration.