To make a better understanding of the influence of working fluid on system

an approximate analytic solution of integral evaporating heat transfer in the thin film region of meniscus was obtained by solving the mathematic model of heat and mass transfer of thin film.According to the analysis

heat and mass transfer characteristic of an evaporation meniscus for different working fluids differed a lot even in the same working condition.Among all physical parameters

the influences of the ideal evaporation mass and the latent heat were dramatic.The ideal evaporation mass can reflect the mass transfer capability of the working fluid

and the latent heat can reflect the heat transfer capability of the working fluid.Through the present work

it's learnt that system with ammonia has better transfer capability than that with methanol or pentane.