溶液除湿蒸发冷却空调制冷系统性能研究.PDFVIP

溶液除湿蒸发冷却空调制冷系统性能研究 年卫琦, 刘 　雄, 杨登科 ( 西安建筑科技大学, 陕西西安 　710055) 摘 　要 : 　提出了一种新的溶液除湿空调制冷系统, 它采用了蒸发冷却技术和直接接触换热技术, 用制冷剂取代冷却水 作为溶液和制冷剂自身的冷却介质, 降低了冷却水用量; 同时它以适当提高再生温度为代价, 加大了再生溶液进出口的 浓度差, 减少了再生溶液的质量流量, 大幅度降低了再生热量, 实现了系统再生能力和除湿能力的良好匹配。经过计算 和分析, 新系统的整体性能要优于常规溶液除湿空调制冷系统。 关键词 : 　溶液除湿; 蒸发冷却; 性能匹配 中图分类号: 　TB657. 2　　　　文献标识码 : 　A Performance Study of a L iqu id D esiccan t Evapora tive Cooling A ir - cond ition ing Refr igera tion System N IAN W eiqi, L IU Xiong, YANG Dengke (Xi ’an University of A rchitecture Technology, Xi’an 710055, China) Abstract: 　A new evaporative airconditioning refrigeration system using liquid desiccantwas p resented. Compared with the con ventional liquid desiccant airconditioning refrigeration system, the new system adop ts evaporative cooling technology and direct m ixing heat transfer technology and uses refrigerant rather than water as cooling medium of the cycle system, thus the cooling wa ter usage was reduced. On the other hand, the new system increases the differential concentration of regenerated solution by rai sing regeneration temperature p roperly, which reduces the mass rate of regenerated solution farther to reduce the regeneration heat in a large p roportion. The new system actualizes the good match between absorbing ability and regenerating ability. The analytical results show that the new system has the better performance in whole performance than conventional system. Key words: 　liquid desiccant; evaporative cooling; the matching of capability 1　前言 质量流量必须足够大, 以带走除湿过程所产生的 热量, 这就造成溶液的再生热量较高, 导致整个系 常规的绝热型溶液除湿空调制冷系统如图 1 统的性能系数较低[ 1～3] 。本文提出了一种新的系