Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.
With the advanced electronics systems, heat fluxes are also elevated over 100 W/cm2 at local hot spots. Therefore, to meet this aggressive thermal need both academia and industry have studied liquid cooling with dielectric fluids especially with perfluorocarbons. Elevated pressures, dielectric fluids mixtures, subcooling, and surface enhancement techniques have been studıed to enhance the peak heat flux in pool boiling called CHF. This paper is goıng to dıscuss the experimental results of pool boiling and CHF for various heaters (silicon and Beryllium Oxide). Both subcooling and pressure effects over the boiling curves and CHF values have been investigated. İt is found that current heater show a stronger dependence on subcooling for the CHF values. A weaker shift of the boiling curve with the elevated pressure has also been observed.