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- W2605777524 abstract "This work presents an innovative avenue for employment of high porosity open-cell metal foams as extended heat transfer surfaces in passive cryogenic radiators. Metal foams are known for being light in weight and possess high surface area density. In contrast to a solid surface, porosity of metal foams makes it feasible for penetration of radiation thereby resulting in higher radiatively interactive surface area. Two 20 PPI metal foams made of copper and aluminum with 94.9% and 90.3% porosity respectively have been chosen for this study. A laboratory-scale test rig measures the radiative cooling capacity of metal foams in vacuum (10−6 mbar) subjected to liquid nitrogen environment. Heat load to the foam has been provided by means of convective fluid loop. Simultaneously, a theoretical model based on radiation-conduction fin analysis has been developed to predict the foam cooling capacity at a specified temperature. The required radiation heat transfer coefficient has been obtained from a previous experiment wherein the foam samples are freely suspended in similar conditions but with no heat load. Lastly, performance of the foams under study has been expressed in terms of a commonly used performance parameter (surface area/cooling capacity) for passive cryogenic radiators." @default.
- W2605777524 created "2017-04-28" @default.
- W2605777524 creator A5021458796 @default.
- W2605777524 creator A5063056162 @default.
- W2605777524 date "2017-06-01" @default.
- W2605777524 modified "2023-10-14" @default.
- W2605777524 title "Cooling capacity of high porosity open-cell metal foams as passive cryogenic radiators" @default.
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- W2605777524 doi "https://doi.org/10.1016/j.cryogenics.2017.04.005" @default.
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