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利用空气-水热湿交换过程湿和显热相互转换的原理,从的角度对蒸发冷却过程进行了重新认识和分析。比较了直接蒸发冷却和间接蒸发冷却制备冷水方式,从损失的角度指出了两种方式制取冷水极限温度不同的本质原因。在换热面积无限大和换热面积有限两类工况下,通过湿-显热转换过程分析了两种不同结构的间接蒸发冷却制备冷水的流程。在换热面积有限工况下,通过显热和湿的转换得到了系统的显热损失平衡的原理,研究了流程内部各环节换热面积分配的优化方法;比较了间接蒸发冷水机的两种不同结构,尝试从系统换热量与制冷量之比、系统总传递损失的角度得出对流程结构的一些新的认识。
Based on the principle of mutual conversion between wet and sensible heat in the process of air-water heat-moisture exchange, the evaporative cooling process is re-recognized and analyzed. The comparison between direct evaporative cooling and indirect evaporative cooling for the preparation of cold water shows the essential causes of the difference between the two methods for obtaining the limit temperature of cold water from the perspective of loss. Under the condition of infinite heat transfer area and limited heat exchange area, two processes of indirect evaporative cooling for preparing cold water were analyzed through the process of wet-sensible heat transfer. Under the condition of limited heat transfer area, the principle of the sensible heat loss balance of the system was obtained by sensible heat and wet conversion. The optimization method of heat exchange area distribution in each step of the process was studied. Two indirect evaporative water chillers Different structures, try to get some new understanding of the process structure from the perspective of the ratio of system heat transfer and cooling capacity, the total transmission loss of the system.