相变蓄热式集热器蓄放热数值与实验分析  

NUMERICAL ANALYSIS OF HEAT CHARGE AND DISCHARGE CHARACTERISTICS OF SOLAR COLLECTORS INTEGRATED WITH PHASE CHANGE THERMAL STORAGE

作　　者：刘宇飞[1] 章学来[1] 华维三 祝啸 丁锦宏[1] Liu Yufei Zhang Xuelai Hua Weisan Zhu Xiao Ding Jinhong(Institute of Cool Storage Technology, Shanghai Maritime University, Shanghai 201306, China)

机构地区：[1]上海海事大学蓄冷技术研究所,上海201306

出　　处：《太阳能学报》2017年第9期2486-2492,共7页Acta Energiae Solaris Sinica

基　　金：上海市教委重点项目(12ZZ154)

摘　　要：对一种相变蓄热式太阳集热器的蓄放热过程进行CFD软件数值模拟和实验测试。该集热器由全玻璃真空集热管、相变蓄热单元和U型换热器组成。选用相变温度在330~400 K的3种适合于太阳集热器的复合相变材料石蜡、Ba(OH)_2·8H_2O和赤藻糖醇,在蓄热式集热器中进行蓄放热性能测试。研究表明,填充Ba(OH)_2·8H_2O的蓄热式集热器在总蓄热量、材料内部温度均匀性等蓄放热方面性能优越。实验结果对蓄热式集热器的设计具有参考价值。This paper presents the characteristics of heat charge and discharge in the solar collectors integrated with phase change thermal storage. The solar collector consists of an all-glass evacuated tube solar collector, latent heat energy storage （TLHES） and a U-type heat transfer exchanger. At the melting temperature range of 300-400K, paraffin wax, Ba （OH）2＂ 8H20 and erythritol are chosen to test their characteristics of heat charge and discharge in the solar collectors with thermal storage. The results indicated that the charge and discharge performance of heat storage, filled with Ba（OH）2-8H^O, is more superior than that with paraffin wax and erythritol, at the aspects of total heat storage and internal temperature uniformity. The results got here can also provide good references to optimize the structural design of the solar collectors integrated with phase change thermal storage.

关 键 词：蓄热式集热器 相变材料 蓄放热性能 数值模拟 

分 类 号：TK02[动力工程及工程热物理] TK512.4