To give a wide survey on the performance of cryogenic heat pipes, various tests with 11 different types of heat pipes had been performed in the temperature range of 70 K - 200 K. The tests included 4 working fluids (CH4, C2H6, N2, CF4) and capillary structures of various types (4 geometries of open grooves, screen covered grooves, different layers of screen at the wall, 'eight-artery' and a 'modular structure'). The results confirm the advantages of axial-grooved heat pipes. The maximum heat transfer capability has been achieved with screen covered grooves.
Experimental evaluation of cryogenic heat pipes with various heat carriers and capillary structures
Experimentelle Untersuchung von kaelteerzeugenden Waermeleitrohren mit Kapillarstruktur unter Einsatz verschiedener Waermetraeger
3RD INTERNAT. HEAT PIPE CONF., AIAA ; 203-210
1978
8 Seiten, 7 Bilder, 7 Quellen
Conference paper
English
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