摘要
以分子筛 -水为吸附工质对对真空管型太阳能吸附集热器的集热性能进行了详细的分析计算 ,其中包括真空管内、外玻璃间非均匀温度表面的辐射换热 ,两相邻管之间的辐射换热 ,真空管与背板间的辐射换热以及背板的反光等 .同时以制冷量、成本和集热器面积三要素构成新的评判指标 ,对吸附器的结构参数 (管径、管距和吸附剂厚度 )进行了分析 .计算结果表明 ,以大直径的真空管作吸附集热器时 ,可获得较好的综合性能 ;从评判指标来看 ,应用大管径吸附器且两相邻管的中心距离等于 2 .5倍的管径 ,吸附剂的最佳厚度大约为
Detailed analyses and simulations of heat transfer have been carried out on an evacuated tube for solar-powered adsorption refrigerator, including inhomogeneous radiation heat transfer between its inner and outer tubes, two adjacent tubes, tube and back plate, sun light reflection on back plate, etc. A new cost-effectiveness parameter is applied to analyze the structure parameters, including diameter of evacuated tube, distance between two adjacent tube centers and the thickness of adsorbent. Some results are obtained which show that evacuated tubes with a larger diameter can result in a higher temperature and better performance. When the thickness of adsorbent equals to 10 mm and the distance between two adjacent tube centers equals to 2.5 times the diameter, the best economic performance can be obtained.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2002年第8期824-831,共8页
CIESC Journal
基金
国家重大基础研究规划 973课题 (No .G2 0 0 0 0 2 63 0 9)
高等学校优秀青年教师教学和科研奖励基金
高等学校博士学科点专项科研基金 (No .2 0 0 0 0 2 480 8)资助项目
