CRITICAL HEAT FLUX AND BOILING HEAT TRANSFER IN JET COOLING

摘要

A cooling technique using liquid jet flow is widely applied to efficiently cool high density heat sources where heat transfer coefficients commonly exceed 10,000 W/(m~2K) at relatively high heat flux. The critical heat flux (CHF), which defines the upper limit of the efficient range of boiling heat transfer, limits the maximum heat flux that may be dissipated from these components. For enhancement of the CHF, it is very important to utilize the boiling heat transfer properly and to satisfy the demand of efficient cooling process. Various jet impingement systems offer very attractive means to enhance the CHF. The CHF for the boiling in the jet impingement systems enhancement and boiling are explained and the CHF correlations are presented.