CFD-based investigation of R22 flow boiling characteristics in corrugated pipes

Abstract

Double pipes are widely used in the food industry. In order to investigate the influence of different corrugation heights on the heat transfer performance of the corrugated pipe, the corrugated tubes with different sizes have been analyzed. The influence of different corrugation heights on the heat transfer coefficient and the pressure drop has been studied. An effect of the refrigerant velocity on the heat transfer coefficient and the pressure drop has been analyzed. The results show that the highest heat transfer coefficient takes place at the corrugation height 3.3mm. With an increase of the refrigerant velocity, the heat transfer coefficient and the pressure drop grow.