Effect of Liquid Flow Rate on Liquid Film Behavior and Heat Transfer in Shear-driven Liquid Film Flow

Abstract

Liquid film flow is a promising method for reducing refrigerant charge in heat exchangers compared to flooded-type heat exchangers. To investigate the evaporation heat transfer characteristics of shear-driven liquid film flow, where the liquid film is influenced by interfacial shear stress generated by co-current gas flow, experiments were conducted to observe liquid film behavior and evaluate local heat transfer coefficients. This study focused on the effect of liquid flow rate on the film behavior and heat transfer performance of this shear-driven liquid film flow.