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基于蒸发冷却技术的热回收特性,设计了一种蒸发冷却新风处理系统,并对核心模块采用实验数据及文献中的实验数据进行验证,在此基础之上建立模块和系统的数学模型.模拟结果表明:该系统对于新风独立降温除湿过程具有较大的节能效果和潜力.在新风状态参数为35℃、21.68 g/kg,送风状态参数为19.3℃、9.0 g/kg,全热回收模块中喷淋填料传质单元数为2.5,表冷器换热能力为1.65 k W/K条件下,系统全热回收效率和排风利用效率在循环水流量为1.6kg/s时达到最大,分别为72.6%和82.2%.最佳循环水流量随进口空气湿差和温差的增大及表冷器换热能力的减小而增大,喷淋填料传质单元数的变化对最佳循环水流量影响较小.当喷淋填料传质单元数大于1.3时,表冷器换热能力对系统全热回收效率的影响比喷淋填料换热能力要大.
Based on the heat recovery characteristics of evaporative cooling technology, an evaporative cooling fresh air treatment system is designed, and the core module is verified by the experimental data and the experimental data in the literature, and on this basis, the mathematical model of the module and the system is established. The results show that the system has great energy-saving effect and potential for fresh air cooling and dehumidification process independently.When the fresh air condition parameters are 35 ℃, 21.68 g / kg, air supply status parameters are 19.3 ℃, 9.0 g / kg, Sprinkler mass transfer unit number of 2.5, Table cooler heat exchange capacity of 1.65 k W / K conditions, the system total heat recovery efficiency and exhaust efficiency of circulating water flow of 1.6kg / s reached the maximum, respectively 72.6% and 82.2%, respectively.The optimum circulating water flow rate increased with the increase of inlet air humidity and temperature difference and the decrease of heat exchange capacity of surface coolers. The change of mass transfer units The effect is small.When the number of mass transfer units of spray packing is more than 1.3, the effect of heat exchange capacity of surface coolers on the total heat recovery efficiency of the system is greater than the heat exchange capacity of spray fillers.