日光温室专用多曲面槽式太阳能空气集热器热工性能试验研究  

Experimental Study on Thermal Performance for the Specialized Multiple Curved Surfaces Trough Solar Air Collector Dedicated to Solar Greenhouse

作　　者：陈紫光[1] 陈超[1] 凌浩恕[1] 郑宏飞[2] 管勇[1] 张纪涛[3] 李娜[1] 孙保东[4] 宫伦祥[4] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京理工大学机械与车辆学院,北京100081 [3]山西省农业科学院现代农业研究中心,太原030031 [4]北京首都国际机场股份有限公司,北京100621

出　　处：《建筑科学》2014年第8期58-63,105,共7页Building Science

基　　金：国家自然科学基金项目"太阳能-相变蓄热技术在新风系统中的应用研究"(50678006)"相变蓄热技术在农业用被动式太阳能温室中的应用研究"(50978002)

摘　　要：受到建筑材料热物性能的限制,透射在被动式日光温室北墙的太阳能对墙体内部层温度影响范围较浅,墙体的显热蓄热功能得不到充分利用。为此,基于提出的日光温室太阳能主-被动式三重结构相变蓄热墙体构筑方法,项目组团队研发了一种可直接安装在日光温室后墙顶部、体积小、安装方便且不占用耕地的日光温室专用多曲面槽式太阳能空气集热器,将该集热器加热的空气通过小型风机输送到墙体内部以提高中间厚重墙体的显热蓄热能力。为了探究所研制的多曲面槽式太阳能空气集热器热工性能,本研究搭建了关于该空气集热器热工性能试验台,重点研究了太阳辐照度、集热器内空气流速与进口温度、集热器保温性能及集热器长度等因素对其出口温度、集热量与集热效率等热工性能参数的影响规律。试验结果表明：所研制的多曲面槽式太阳能空气集热器管内空气流速宜为1.6~1.8 m/s,集热器单元的串接长度宜为16~18 m;晴好天气时,空气集热器的最大瞬时集热效率可高达56.7%,单位面积日累积集热量可达6.2 MJ/（m2·d）。By the performance of building material limit, transmission in passive solar greenhouse of north wall solar on internal layer temperature range is shallow, sensible heat thermal storage function cannot be fully utilized. Therefore, the main greenhouse solar-proposed passive three structure phase change wall construction method proposed by our group, project team developed a can be directly installed in the solar greenhouse back the top of the wall, small size, convenient installation and no occupation of farmland greenhouse special surface trough solar air collector, the collector heating air through a small fan is transported to the internal wall to improve the intermediate thick sensible heat thermal storage ability of the wall. In order to multi surface trough solar air into the set of thermal performance of heat exchanger, this study builds on the air collector thermal performance test rig focuses on the solar irradiance, collector of air velocity and inlet temperature, thermal insulation performance and the heat collector length factors effect on the outlet temperature, heat collection and heat collecting efficiency. The test results show that： the air velocity on the salar collector should be 1.6 - 1.8 m/s, the collector unit series connection length should be 16 - 18 m; at the fine weather, the maximum instantaneous air collector efficiency can be as high as 56.7% , and the per square meter of cumulative heat collection up to 6.2 MJ/ （m2·d）.

关 键 词：日光温室墙体 主动蓄热 多曲面槽式太阳能空气集热器 热工性能 试验研究 

分 类 号：TK515[动力工程及工程热物理—热能工程]