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文章编号： 1672-6987（2022）01-0077-09； DOI： 10.16351/j.1672-6987.2022.01.011
高杨， 张树坤， 许玲， 周艳*（青岛科技大学 机电工程学院，山东 青岛 266061）
摘要： 采用数值计算方法对填充在多内管换热器中的石墨烯/石蜡复合相变材料的熔化凝固性能进行了深入研究，分析了换热内管数目不同，当换热内管中分别通入一定温度的热水或凉水时，换热器内的相变材料（PCM）在熔化或凝固过程中的温度和液相率（液相体积分数）随时间的变化关系。结果表明：熔化时PCM与换热管之间以自然对流换热为主，凝固时，由于导热热阻影响，使PCM完全凝固过程比完成熔化过程所需的时间要长；内管数目增加，可有效缩短PCM完全熔化和完全凝固时间；内管间距对相变材料的凝固过程有一定影响；换热内管的入口水温对PCM的熔化及凝固有较大影响，熔化时，入口水温越高，PCM的熔化速率越大，凝固时，入口水温越低，PCM的凝固速度越大。
关键词： 复合相变材料； 多内管换热器； 熔化凝固； 管间距； 入口水温
中图分类号： TK 172.4文献标志码： A
引用格式： 高杨， 张树坤， 许玲， 等. 石蜡/石墨烯相变材料在多管换热器中的储热性能［J］. 青岛科技大学学报(自然科学版), 2022, 43(1): 77-85.
GAO Yang， ZHANG Shukun， XU Ling， et al. Heat storage performance of paraffin/graphene phase change material in multi-tube heat exchanger［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2022， 43（1）： 77-85.
Heat Storage Performance of Paraffin/Graphene Phase Change Material
in Multi-tube Heat ExchangerGAO Yang， ZHANG Shukun， XU Ling， ZHOU Yan
(College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China)
Abstract: The melting and solidification properties of graphene/paraffin composite phase change material filled in multi inner tubes heat exchanger are deeply studied by numerical calculation method. It is analyzed that when the number of inner tubes is different, and when hot water or cold water at a certain temperature is introduced into the inner tubes, the temperature and liquid phase ratio of phase change material (PCM) with time during melting or solidification. The results show that during melting, the convective heat transfer between PCM and heat exchange tubes is dominant, during solidification, due to the influence of thermal resistance of heat conduction, the complete solidification process of PCM takes longer than that of melting process. Increasing the number of inner tubes can effectively shorten the complete melting and solidification time of PCM. The spacing of inner tubes has a certain effect on the solidification process of PCM. The inlet water temperature of the heat exchange inner tubes has a great influence on the melting and solidification of PCM. During melting, the higher the inlet water temperature, the greater the melting rate of PCM. During solidification, the lower the inlet water temperature, the greater the solidification rate of PCM.
Key words: composite phase change material; multiple inner tube heat exchanger; melting and solidification; tube spacing; inlet water temperature
收稿日期： 2021-02-17
基金项目： 国家自然科学基金项目（51176080）.
作者简介： 高杨（1996—），女，硕士研究生.*通信联系人.
