随着太阳能热利用需求的日益增长，真空管太阳能集热器的相关研究得到广泛关注。本文针对空气式真空管太阳能集热器，概述了集热器结构和相变材料对系统热效率的影响，及相变材料与集热器的组合方式，总结了真空管集热器应用中存在的问题，提出了通过改进组合结构以及增加换热面粗糙度提高相变蓄热性能将是重点研究方向。

With the increasing demand for solar thermal utilization,the related research on evacuated tube solar collectors has received extensive attention.This paper outlines the influence of the collector structure and phase change materials on the thermal efficiency of the system and the combination mode of phase change materials and collectors,aiming at the airtype evacuated tube solar collectors.The problems in the engineering application of evacuated tube collectors are summarized.The key research direction in the future is to improve the phase change heat storage performance by improving the combined structure and increasing the roughness of the heat exchange surface.

TK513.5

上海市科技兴农项目（F01469）