基于微热管阵列的平板太阳能热水器的性能试验  

Performance experiments for flat plate solar water heater based on micro heat pipe array

作　　者：邓月超[1] 全贞花[1] 赵耀华[1] 王林成[1] 叶三宝[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《农业工程学报》2013年第4期222-228,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：北京市自然科学基金重点项目(Z1004020201201);建筑安全与环境国家重点实验室开放课题(BSBE2011-07);"十二五"国家科技支撑计划"太阳能综合利用新技术"(2012BAA10B02)

摘　　要：为了检验一种新型平板太阳能热水器的性能,该文对其核心部件—基于微热管阵列的集热器及其组成的热水器进行了热性能试验。集热器热性能测试结果表明,微热管阵列平板太阳能集热器瞬时效率的斜率为4.7,截距为0.80,分别优于国家标准要求值11.0%和22.3%。在满足测试要求的天气情况下,对微热管阵列平板太阳能热水器进行的多次热性能测试结果表明,热水器的日有效得热量均高于国家标准要求值,日平均集热效率均高于60%。同时,该热水器具有承压能力强、无炸裂、轻巧、成本低、无需焊接、抗冻性能好、易于建筑一体化等优势。基于微热管阵列的平板太阳能热水器由于性能优异,并能克服现有太阳能热水器的缺点,具有广阔的应用前景。A novel flat plate solar water heater based on the micro heat pipe array （MHPA） was invented, and the experiments were carried out on the MHPA heat collector and water heater to test their thermal performance. Owing to its distinctive structure, the MHPA has good heat transfer ability, high reliability, high compressive strength and low cost. The structure and character of the novel collector with MHPA as the high-efficiency heat transfer element are as follows. First, the contact surface between the absorber and the MHPA is so large that the heat resistance is smaller than the traditional one, thus its thermal transfer capability is greatly improved. Second, the condenser section of the MHPA is connected closely to the heat exchanger with dry type. The heat pipes do not contact with water, which precludes scaling and leakage in the collector. Third, the MHPA uses low freezing points of the refrigerants, which makes the collector more suitable for extremely cold areas. Fourth, the MHPA is made of aluminum instead of copper, which could reduce the fabrication cost significantly. Fifth, the unique heat exchanger could exclude water easily, which could prevent the frozen cracking of the collector in winter. Consequently, compared with other conventional evacuated glass tube solar water heaters, the novel flat plate solar water heater offers the additional benefits of high compressive strength, light weight, high reliability and durability, easy integration into buildings, and resistance to freezing during the winter months. Compared with traditional sheet-and-tube structure flat plate solar water heaters, this novel solar water heater also demonstrates many advantages： lower cost, absence of welding, resistance to freezing. The experiments focused on the novel collector＇s instantaneous efficiency. The test results for the collector＇s instantaneous efficiency show that the slope and intercept of the instantaneous efficiency curve are 4.7 and 0.80 respectively, which are 11.0% and 22.3% superior to the techn

关 键 词：太阳能热水器 太阳能集热器 热管 微热管阵列 热性能 

分 类 号：TK515[动力工程及工程热物理—热能工程]