采用抛物面槽聚焦集热器的太阳能双效吸收式制冷系统的性能研究  

PERFORMANCE STUDY OF A SOLAR COOLING SYSTEM WITH PTC AND A DOUBLE-EFFECT ABSORPTION CHILLER

作　　者：韩崇巍[1] 季杰[1] 何伟[1] 裴刚[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230026

出　　处：《太阳能学报》2010年第2期150-157,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50708105);安徽省自然科学基金(070414161)

摘　　要：建立了采用抛物面槽聚焦集热器(PTC)的太阳能双效LiBr/H_2O吸收式制冷系统的理论模型,对其性能进行了数值模拟,研究了运行温度对系统总效率的影响,计算结果显示:PTC在高温工作条件下具有非常高的集热效率;运行温度为173.5℃时,系统总效率最高,达到0.8250;与采用复合抛物面聚焦集热器(CPC)和高效真空管集热器(ETC)相比,采用PTC的太阳能双效吸收式制冷系统具有最佳的系统性能;相同条件下,选用PTC时集热面积最小,但由于PTC的价格很高,导致系统成本很高。A numerical model of the solar cooling system with PTC and a double-effect LiBr/H_2O absorption chiller was set up for the simulation of the system performance,and the influence of the operating temperature on the overall efficiency of the system was studied.The results show that the PTC possesses very high efficiency at high temperature; the over-all efficiency of the system achieves a maximum value of 0.8250 at operating temperature of 173.5℃ ; the system with PTC and a double-effect LiBr/H_2O absorption chiller has better system performance compared with the solar absorption cooling system with CPC or ETC; when PTC is used,its area is the least under the same design condition,but due to its high price,the system cost is still at a high level.

关 键 词：太阳能制冷 PTC 双效 LiBr/H2O 性能 

分 类 号：TK519[动力工程及工程热物理—热能工程] TB616[一般工业技术—制冷工程]