两种全玻璃真空管型太阳集热器集热系统动态特性比较  

SYSTEM DYNAMIC PERFORMANCE COMPARIASON OF TWO TYPES OF ALL-GLASS EVACUATED TUBE SOLAR COLLECTORS

作　　者：高岩[1,2] 蔺新星[2] 张昕宇 张广宇[4] 王鸣霄[1] 刘然[2] 

机构地区：[1]北京建筑大学,供热供燃气通风及空调工程北京市重点实验室,北京100044 [2]北京建筑大学,绿色建筑与节能技术北京市重点实验室,北京100044 [3]国家太阳能热水器质量监督检验中心(北京),北京100013 [4]中国建筑设计研究院,北京100044

出　　处：《太阳能学报》2016年第6期1461-1467,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51178023);教育部新世纪优秀人才项目(NCET-13-0654)

摘　　要：利用实验研究全玻璃真空管型集热器热模型的结果表明,全玻璃真空管内的容水热容对太阳能热水系统动态特性的影响不容忽略,应在模拟采用的方程中包含热容项。冬季采暖工况下比较全玻璃管及U型管式全玻璃真空管型集热器组成的太阳能热水系统的热性能:集热器的出水温度、水泵的运行、有效集热量等,结果显示,在不考虑热容影响情况下,全玻璃管集热器系统的集热量、热效率稍大于U型管式系统。但考虑实际存在的管内容水热容的影响后,U型管式全玻璃真空管型集热器系统却明显大于全玻璃管真空管型集热器系统。通过不同气候条件下的4个典型地区的模拟结果显示,2种集热器集热系统,U型管式全玻璃真空管型集热系统有相对较高的集热效率。对于容水量差距较大的集热器,完全依靠集热器截距效率、热损失系数难以完全评判太阳能集热系统的有效集热能力。The experimental investigation reveals that the effect of thermal mass on the system dynamic thermal performance is evident, and it is necessary to be included in thermal simulations of all-glass evacuated tube collector （AGETC）. Furthermore, the dynamic thermal performance of two solar collector systems installed for space heating with AGETC and U-pipe all-glass evacuated tube collector （UpAGETC） were compared in collector outlet temperature, pump operation, effective energy collection, etc. The results reveal that heat collecting capacity, thermal efficiency of AGETC system are higher slightly than that of UpAGETC system during without considering heat capacity. However, UpAGETC system will be better than AGETC system evidently during considering actual water quantity and heat capacity in tube. The simulation results in four typical regions with different climate conditions show that UpAGETC system has higher energy efficiency than AGETC system in two solar collector systems. For solar collectors with larger water capacity gap, totally depending on the intercept efficiency and heat loss coefficient of solar collectors is difficult to fully judge the effective collecting ability of solar collector system.

关 键 词：全玻璃真空管型集热器 U型管式全玻璃真空管型集热器 太阳能集热系统 动态特性 

分 类 号：TU832.1[建筑科学—供热、供燃气、通风及空调工程] TK511.2[动力工程及工程热物理—热能工程]