溶液除湿蒸发冷却系统构建及其性能

Construct and performance research on liquid desiccant evaporative cooling system

在直接蒸发冷却和间接蒸发冷却(IEC)优化组合的基础上构建了溶液除湿蒸发冷却系统(LDCS),该系统通过IEC对排风进行全热回收,并能够提供高质量的空调送风.研究表明:用LDCS进行空气调节是完全可行的,可有效利用太阳能、工业废气余热、燃气发动机余热等低品位热源,且系统能源利用效率较高,在热源温度为70℃时可达0.8;具有优异的蓄能特性,蓄能密度一般大于1 000MJ/m3,与常规蓄能模式相比,有显著的优势;在设定工况下,系统热力系数为0.94.

Based on the optimization combination of direct evaporative cooling （DEC） and indirect evaporative cooling （IEC）, a liquid desiccant evaporative cooling air conditioning system （LDCS） is constructed, which can recover heat from discharge air by IEC and supply air with high quality. The performance research indicates that it is absolutely feasible to use LDCS for air conditioning. The system can make good use of solar energy and waste heat of industrial discharge gas. The efficiency of energy utilization is considerable, which is able to achieve 0. 8 when the temperature of heat reservoir is over 70℃. Also the system has excellent performance for energy storage and the density of energy storage is generally over 1 000 MJ/m^3, which means that this energy storage method is more effective than conventional ones. The COP （coefficient of the system performance） is 0.94 when LDCS operates under the setting work conditions.