A model to predict saturated critical heat flux in minichannels and microchannels
Koşar, Ali (2008) A model to predict saturated critical heat flux in minichannels and microchannels. (Submitted)
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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 mini- and microchannels that include various working fluids (Water, R-123, R-113, R-134a, and R-245fa) and a broad range of mass velocities (50-1600 kg/m2s) and pressures (101 kPa-888 kPa). The agreement between the model and experiments was good (overall mean absolute error (MAE) =25.8%), and it becomes particularly better for the experimental data obtained from thin wall/substrate minichannel and microchannel configurations (MAE=21.3%), which were not vulnerable to any boiling instabilities. Keywords: Critical Heat Flux, Saturated Convective Boiling, Microchannels, Minichannels, Boiling instabilities
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