Thermal design space prediction in two-phase direct liquid cooling

Software for predicting the optimum operating conditions for a two-phase liquid cooling environment is presented. This software consists of a data bank which includes a variety of physical and thermodynamic properties of fluorocarbons. It also includes heat transfer correlations which cover the range from single-phase boiling incipience, to nucleate boiling, to critical heat flux. The heat flux of the integrated circuit is compared to the calculated boiling incipience heat flux and critical heat flux to determine if the operating conditions provide for nucleate boiling. The optimum operating conditions are determined for three cooling schemes: pool boiling, flow boiling, and jet impingement boiling. Application of the software indicated that the jet impingement boiling has better thermal performance than flow and pool boiling. The uncertainties involved in the software predictions are considered in terms of design rule development.<
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