新型无水箱相变蓄热式太阳能集热器及热性能研究  

Research on the new non-water tank solar collector with PCM heat storage and thermal performance

作　　者：华维三 章学来[1] 刘锋[1] 杜晓冬[1] 

机构地区：[1]上海海事大学蓄冷技术研究所,上海201306

出　　处：《可再生能源》2017年第3期395-400,共6页Renewable Energy Resources

基　　金：上海海事大学优秀博士学位论文培育项目(2016bxlp003)

摘　　要：设计了一种新型无水箱相变蓄热式太阳能集热器,其主要由太阳能真空集热管、相变储热球、电加热棒和换热管道组成。实验以复合三水醋酸钠为相变材料,进行无水箱相变蓄热式太阳能集热器的热性能研究,结果表明:在总容积为34 L的集热管组中添加20%的相变储热球后,管内单位容积蓄热量增加,总蓄热量达8.2 MJ;放热过程高温段延长,放热量增加1.98 MJ,有效放热率为0.81;经夜间保温测试,集热管组温降率为1.4℃/h。This is a new non-water tank solar collector with PCM heat storage, which is comprised of solar evacuated collector tube, phase-change heat storage ball, electrical heating rod and heat transfer tube. The experiment conducts the research on thermal performance of non- water tank solar collector with PCM heat storage using improved sodium acetate trihydrate as the phase change material. The result shows that the heat storage capacity in unit volume is increased and the total heat storage reaches to 8.2 MJ when 20% phase-change heat storage ball is added to solar evacuated collector tube with 34 L total volume. The high temperature period is extended during the exothermic process and the heat release has been increased by 1.98 MJ with 81% effective heat release rate. After heat preservation at night, the temperature drop rate reaches to 1.4 ~C/h, mainly heat loss through radiation.

关 键 词：太阳能 集热器 相变材料 相变球 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]