Effects of pulsating flow on heat transfer performance and pressure drop in an air-refrigerant evaporator have been explored.

Pulsating flow has enhanced overall and refrigerant-side heat transfer coefficient by 27% and 123% respectively, compared to continuous flow.

Pulsation period has a big effect on heat transfer performance; a larger enhancement at a shorter period was observed.

The temporal pressure drop for pulsating flow changes periodically following the pulsation period.

Pulsation effect on pressure drop becomes weaker at a larger mass flux and a shorter pulsation period.