(70f) Screening and Evaluation of Mixture Formulations for Thermal Energy Transfer in Electronic Systems

Computer-aided molecular design and figure of merit analysis were used to screen mixture formulations that enhance the thermodynamic properties and pool boiling heat transfer performance of Novec fluid HFE 7200. Mixtures of HFE 7200 with methanol and ethoxybutane were identified as promising candidates for further study and their thermophysical and dielectric properties were measured. The pool boiling performance of the two mixtures was investigated on a 1 cm × 1 cm silicon substrate with copper nanowire arrays. The performance of HFE 7200 + methanol mixtures showed an increase in critical heat flux, but a decrease in boiling incipience and heat transfer coefficient. On the other hand, HFE 7200 + ethoxybutane mixtures exhibited significant increases in critical heat flux and heat transfer coefficient, with only a small increase in incipience superheat.