Evaporation Performance of a New Plate-Type Heat Exchanger with Winding Tubes on Plate Surfaces (Estimation of Performance of the Heat Exchanger)

摘要

A method for evaluating and predicting the performance of a newly developed plate-type heat exchanger as an evaporator for water-refrigerant systems such as chillers has been developed. The main component of the developed heat exchanger consists of plates packed together in a casing with winding tubes connected to both sides of the plates. Refrigerant flows inside the tubes, and water flows in the space between the plates. A herringbone-like pattern is formed in this space by the cross sections of the winding tubes. The newly developed method estimates evaporation performance of the developed heat exchanger using new empirical correlations. There are correlations for heat transfer and pressure drop in winding-tube banks on the water side, and correlation for the pressure drop on the refrigerant side.