Performance simulation of plate-and-tube evaporative cooling frost-free heat pump heat exchanger

Abstract

To verify the operational feasibility of the plate-and-tube evaporative cooling frost-free heat pump heat exchanger and its influence factors, a single plate-and-tube was selected as the simulation object, and the VOF model, RNG k-ε model, and self-programmed UDF program were used to control the water vapor transfer mass to verify the influence of air flow rate on the internal flow and heat and mass transfer law of the model. The results show that as the air velocity increases, the percentage of turbulent flow inside the model increases, and the solution coverage on the surface of the plate and tube decreases slightly; the heat and mass transfer increases with the increase of the flow velocity, and the latent heat, sensible heat, and total heat exchange increase with increase the of the flow velocity.