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A model to predict saturated critical heat flux in minichannels and microchannels

Koşar, Ali (2009) A model to predict saturated critical heat flux in minichannels and microchannels. International Journal of Thermal Sciences, 48 (2). pp. 261-270. ISSN 1290-0729

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Official URL: http://dx.doi.org/10.1016/j.ijthermalsci.2008.08.008

Abstract

A new model to predict saturated critical heat flux (CHF) conditions in minichannels and microchannels was developed. The model was compared to 151 experimental data points obtained from CHF studies on mini- and microchannels encompassing various working fluids (Water, R-123, R-113, R-134a, and R-245fa) over a broad range of mass velocities (50-1600 kg/m(2) s) and pressures (101-888 kPa). A strong correlation between the model and experimental data was supported by an overall mean absolute error (MAE) of 25.8%. Better predictions were noted (MAE = 21.3%) for experiments carried out using thin wall/substrate minichannel and microchannel configurations as well as those configurations which were not vulnerable to boiling instabilities. The consistent performance and broad applicability of this model demonstrate it as a viable tool for predicting the CHF in minichannels and microchannels.

Item Type:Article
Uncontrolled Keywords:Critical heat flux; Saturated convective boiling; Microchannels; Minichannels; Boiling instabilities
Subjects:T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
ID Code:12452
Deposited By:Ali Koşar
Deposited On:03 Nov 2009 15:41
Last Modified:25 May 2011 14:20

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