2024 Volume 41 Issue 2 Pages 149-
In the field of evaporators used for refrigeration and air conditioning equipment, it is required to reduce refrigerant charge due to new refrigerant rules. Methods using liquid film flows such as falling film have been getting attention because of the less refrigerant charge than that of fully flooded heat exchangers. One of the promising methods is the shear-driven liquid film flow. This method makes the liquid film thinner by flowing a fast gas stream, resulting in higher heat transfer performance. In our research, we designed an experiment system to observe liquid film behavior and measure the local heat transfer coefficient simultaneously. The effect of heat flux on the liquid film behaviors and the corresponding heat transfer coefficient of the shear driven liquid film flow is experimentally investigated.