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Response to transient heat load in a helium II loop operated with a self-driven thermomechanical pump

Kasthurirengan, S and Hofmann, A (1998) Response to transient heat load in a helium II loop operated with a self-driven thermomechanical pump. In: Cryogenics, 38 (8). pp. 833-837.

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Abstract

An experimental helium II flow loop with a self-driven thermomechanical pump has been studied for various operational conditions. Some results have been reported earlier. Here we consider the response of temperature at a probe (heat transfer cell) which simulates a critical spot in such loops. We consider how the temperature responds to sudden changes of heat applied to this probe. The heat transfer coefficient, derived from the temperatures of the heated copper probe and of the fluid flowing through a narrow channel, is analysed as a function of flow rate and different operational conditions. Very high overshoots in temperature occur when the heat load is increased suddenly, but they are observed to decay when the flow rate is increased by the arrival of heated fluid at the self-driven pump. Those effects are also studied.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: heat transfer;Forced flow;Thermomechanical pumps;Fountain effect;Superconducting magnets;Superfluid helium
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Cryogenic Technology
Date Deposited: 07 Jul 2006
Last Modified: 19 Sep 2010 04:29
URI: http://eprints.iisc.ernet.in/id/eprint/7778

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