Experimental results of loop heat pipe startup in microgravity

Details Experimental results of loop heat pipe startup in microgravity Experimental results of loop heat pipe startup in microgravity

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..387..647k&link_type=abstract

Space technology and applications international forum (STAIF - 97). AIP Conference Proceedings, Volume 387, pp. 647-652 (1997).

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Natural Convection, Heat Flow In Porous Media

Scientific paper

An experimental package was constructed to operate a loop heat pipe (LHP) in microgravity aboard NASA's KC-135 aircraft. Startup of the LHP was performed in flight and ground testing. Data revealed different temperature profiles for similar startups indicating different locations of the vapor and liquid inventories. A sharp increase in evaporator temperature of approximately 10 K followed by a small decrease was very comparable to startups in capillary pumped loops. In contrast, a steady linear rise in wall temperatures with time was used to indicate the absence of liquid in the vapor sections of the evaporator. Temperature transients in the liquid line during particular startups indicate movement of fluid out of the compensation chamber and into the liquid line. Experimental results match expected behavior and show a high degree of repeatability.

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