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RESEARCH PAPERS

Deterioration in Heat Transfer to Fluids at Supercritical Pressure and High Heat Fluxes

[+] Author and Article Information
B. S. Shiralkar

Massachusetts Institute of Technology, Cambridge, Mass.

Peter Griffith

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass.

J. Heat Transfer 91(1), 27-36 (Feb 01, 1969) (10 pages) doi:10.1115/1.3580115 History: Received March 08, 1968; Revised May 06, 1968; Online August 25, 2011

Abstract

At slightly supercritical pressure and in the neighborhood of the pseudocritical temperature (which corresponds to the peak in the specific heat at the operating pressure), the heat transfer coefficient between fluid and tube wall is strongly dependent on the heat flux. For large heat fluxes, a marked deterioration takes place in the heat transfer coefficient in the region where the bulk temperature is below the pseudocritical temperature and the wall temperature above the pseudocritical temperature. Equations have been developed to predict the deterioration in heat transfer at high heat fluxes and the results compared with previously available results for steam. Experiments have been performed with carbon dioxide for additional comparison. Limits of safe operation for a supercritical pressure heat exchanger in terms of the allowable heat flux for a particular flow rate have been determined theoretically and experimentally.

Copyright © 1969 by ASME
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