新型太阳能无泵溴化锂制冷系统的实验研究  

EXPERIMENTAL STUDY ON NEW STRUCTURE SOLAR PUMP-FREE LITHIUM BROMIDE ABSORPTION CHILLER SYSTEM

作　　者：谷雅秀[1] 吴裕远[1] 王艺[2] 柯欣[2] 张林颖[2] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]西安交通大学制冷与低温工程研究所,西安710049

出　　处：《太阳能学报》2006年第5期473-477,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金资助项目(5017603650276048)

摘　　要：建立了太阳能热水型无泵溴化锂吸收式制冷系统（包括降膜吸收器、降温蒸发器、弦月形热虹吸提升管、冷凝器等）。为提高制冷系统的整体运行效果，设计了一套二次发生装置，并改良了吸收器和蒸发器的结构，使系统能在较低的初始溶液浓度范围（46％～54％）下运行，在80～93℃热源温度下，随热源温度的升高，溶液提升量和浓度增大，使吸收器保持较高的放气范围（6％）和吸收率，从而强化吸收器性能，并使冷剂水产量提高为未开二次发生装置时的1．68倍，明显改善蒸发效果。二次发生装置有效地使热源温度降低到最低启动温度68℃，有效地提高了太阳能利用率。A solar pump-free lithium bromide absorption chiller system with hot water source was designed with falling film absorber, falling film evaporator, lunate thermosighon elevation tube and condenser, etc. In order to enhance the performance of the whole system, a second generator was designed, and the structure of absorber and evaporator was optimized. Therefore the system can operate stably in lower initial solution concentration （initial concentration ranging from 46 % to 54% ）. By decreasing the temperature of heat source （wide operation temperature ranging from 80℃ to 93℃ ）, the elevation solution volume and concentration increase with the heating water temperature. And to make the absorptivity and the differential concentration increase it helps to enhance the performance of absorber. Furthermore, by the aid of second generator the yield of condensate increases 1.68 times. Consequently the evaporation effect is improved obviously. In order to improve the solar energy utility efficiency, the temperature of heat source is decreased to minimum starting temperature 68%.

关 键 词：二次发生装置 太阳能 无泵 溴化锂制冷系统 降膜 弦月形热虹吸提升管 

分 类 号：TB61[一般工业技术—制冷工程] TB65