평판형 집열판 태양열 온수기용 맨틀 축열조의 열전달 현상에 관한 연구

초록

A horizontal mantle heat exchanger for a thermosyphon-driven SDHW was numerically simulated and fluid flow and heat transfer in the annulus of the mantle heat exchanger were quantitatively investigated. The Reynolds number, the location of the inlet, and the gap of the annulus were selected as the important design variables. The efeects of the design variables on the heat transfer characteristics were throughly studied. Based on the numerical results, a correlation for predicting the heat transfer coefficient was suggested as the conclusion of this study.