摘要
提出一种新型双温相变平板式太阳集热器,阐明其构造形式并建立三维物理模型,通过分析建立了冻害温差、冻害程度等安全性能评价指标,分析该双温相变集热器耐高温、耐低温工况下的蓄放热特性,并对不同地区冬、夏季实际条件下相变集热器温度变化进行了动态模拟研究。结果表明,在中国的拉萨地区,双温相变集热器能有效减小过热时间约2 h,使冻害持续时间减少9 h以上、夜间最低温度提高约11℃。
High-temperature overheating and low-temperature freezing damage are the potential safety hazards of common flat-plate solar collectors. In this paper,a new type of dual-temperature PCM-based flat-plate solar collector was proposed,its construction form was clarified and a three-dimensional physical model was established. Through the analysis,safety performance evaluation indexes such as temperature difference and degree of frost damage were established. The heat storage and release characteristics of the dualtemperature PCM-based solar collector under high and low temperature conditions were analyzed,and the temperature variation of PCMbased solar collector under actual conditions in winter and summer in different regions were studied by dynamic simulation. The results show that in Lhasa area,the dual-temperature PCM-based solar collector can effectively reduce the overheating time about 2 hours,reduce the duration of freezing damage by more than 9 hours,and increase the minimum temperature at night by about 11 ℃.
作者
王登甲
邓林新
王晓文
刘艳峰
刘加平
Wang Dengjia;Deng Linxin;Wang Xiaowen;Liu Yanfeng;Liu Jiaping(State Key Laboratory of Green Building in Western China,Xi’an 710055,China;School of Building Services Science and Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)
出处
《太阳能学报》
CSCD
北大核心
2021年第8期265-272,共8页
Acta Energiae Solaris Sinica
基金
“十三五”国家重点研发计划(2016YFC0700400)
国家自然科学基金(51678468
51878532)。
关键词
相变材料
太阳集热器
耐冻
耐高温
冻害评价指标
动态模拟
phase change materials
solar collectors
frost resistance
high temperature resistance
freezing damage evaluation indexs
dynamic simulation
