液体除湿空调实验台的性能分析及实验研究

EXPERIMENTAL INVESTIGATION AND SYSTEM ANALYSIS OF A NOVEL LIQUID DESICCANT AIR-CONDITIONING SYSTEM

针对上海气候环境条件设计制造了利用80℃以下低品位热源驱动的全新风送风LiCl液体除湿空调实验台,用于为100m^2空调区域提供19℃以下的送风,独立承担室内热湿负荷。分析测试了系统送风温度的影响因素,表明再生热源温度是主要影响因素。该系统结构适合采用除湿再生同时运行模式,该模式下系统运行性能为:夏季工况新风制冷量为35～49kW,热力COP为0.72～0.98;秋季工况为17～29kW,热力COP为0.30～0.51。最后验证了除湿再生独立运行模式的可行性与实际效果:新风制冷量45kW,热力COP为1.1,为今后实验台的改进指明了方向。

A novel liquid desiccant air-conditioning system was built up according to Shanghai weather conditions. The temperature of the driving heat energy to regenerate the LiCl solution could be lower than 80℃ and the system could supply all fresh air with the temperature lower than 19℃ to 100m^2 area. The influential factors which could affect the temperature of supply air were theoretically analyzed and experimentally tested. The temperature of the driving energy turned out to be the most important factor. The design of the system made it natural that the absorption and regeneration processes worked simultaneously. The refrigerating capacity/thermal COP of the system under summer and autumn conditions were 35 - 49kW/0.72 - 0.98 and 17 - 29kW/0.30 - 0.51, respectively, under that operating model. While the feasibility and actual effect of another operating model, i.e. the absorption and regeneration processes worked separately, were also researched. The results were pretty encouraging in that the refrigerating capacity / thermal COP were 45kW / 1.1 and this would definitely help to further improve the system in the future.