The effect of six different electrode arrangements on R123 pool boiling heat transfer was investigated. The resultant electric field intensities and distributions on the heat transfer surface were numerically calculated. Both electric field intensity and homogeneity on the heat transfer surface were different for different electrode arrangements. It was found that heat transfer enhancement was related to electric field homogeneity

electric field intensity and heat flux. At a lower heat flux

heat transfer was enhanced more significantly than at a higher heat flux. Meanwhile the higher the electric potential

the more significant the heat transfer enhancement. Electro-hydrodynamics(EHD) boiling heat transfer enhancement was the result of both electric field intensity and homogeneity.