The electric field enhancement of natural convection and pool boiling heat transfer of ethyl acetate on plate surface was investigated. The comparison and analysis for the experimental results were performed. The experimental data indicated that electric field has a strong enhancement effect for natural convection and pool boiling heat transfer of ethyl acetate. The enhancement effect of electric field for ethyl acetate natural convection heat transfer is larger than the effect for pool boiling heat transfer. At the same voltage

the enhancement factor，f，decreases gradually with further increasing heat fluxes. When the heat flux is larger than 4kW8226;m-2

the variations in enhancement effect of electric field for natural convection heat transfer are much less with further increasing of heat flux.At the same heat flux

the enhancement factor increases gradually with increasing voltage of the applied electric field. Since ethyl acetate is a strong polar organic dielectric

it has intense response to the electric field applied. In the experimental condition

the enhancement factor of electric field for natural convection heat transfer reaches 6—7. For pool boiling heat transfer

the enhancement factor reaches 4—5.