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Entropy Generation in Regenerative SystemsHeat exchange to the oscillating flows in regenerative coolers generates entropy. These flows are characterized by oscillating mass flows and oscillating temperatures. Heat is transferred between the flow and heat exchangers and regenerators. In the former case, there is a steady temperature difference between the flow and the heat exchangers. In the latter case, there is no mean temperature difference. In this paper a mathematical model of the entropy generated is developed for both cases. Estimates of the entropy generated by this process are given for oscillating flows in heat exchangers and in regenerators. The practical significance of this entropy is also discussed.
Document ID
Acquisition Source
Ames Research Center
Document Type
Kittel, Peter
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 1995
Subject Category
Fluid Mechanics And Thermodynamics
Meeting Information
Meeting: Cryogenic Engineering Conference
Location: Columbus, OH
Country: United States
Start Date: July 17, 1995
End Date: July 21, 1995
Funding Number(s)
PROJECT: RTOP 233-02-05
Distribution Limits
Work of the US Gov. Public Use Permitted.

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