Performance analysis of multistage indirect evaporative cooling fresh air processing system

被引：0
|
作者：
Huang W. [1 ]
Zhang L. [1 ]
Zhang X. [1 ]
机构：
[1] School of Energy and Environment, Southeast University, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2016年 / 46卷 / 01期
关键词：
Cooling coil; Evaporative cooling; Exergy analysis; Heat recovery;
D O I：
10.3969/j.issn.1001-0505.2016.01.010
中图分类号：
学科分类号：
摘要：
According to the heat recovery characteristic of evaporation cooling, an evaporative cooling fresh air processing system was proposed. Mathematical models of modules and the system were established based on cardinal module verifications using experimental data and literature data. The simulation results show that: during independent cooling and dehumidification of fresh air, this system exhibits remarkable energy-saving effect and potential. Under the condition that the temperature of fresh air is 35℃ (moisture content 21.68 g), the temperature of supply air is 19.3℃ (moisture content 9.0 g), the mass transfer unit number of the packings in heat recovery module is 2.5 and the cooling coil heat transfer capability is 1.65 kW/K, the heat recovery efficiency and exhaust exergy utilization efficiency can reach the maximum values of 72.6% and 82.2%, respectively, when circulating water flow is 1.6 kg/s. The optimum circulating water flow rate increases with the increase of the humidity difference and the temperature difference of the inlet air, or the decrease of the heat transfer capability of the cooling coil. A little variation of the optimum flow rate is observed with the changed mass transfer unit number. When the mass transfer unit number of the packing is greater than 1.3, the cooling coil heat transfer capability has greater impact on the heat recovery efficiency than the packing heat transfer capability. © 2016, Editorial Department of Journal of Southeast University. All right reserved.
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页码：55 / 61
页数：6
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