除湿换热器尺寸结构对其热湿传递特性的研究

In this study, a general-purpose test platform is built to test and compare the heat and mass transfer characteristics. Two heat exchangers of different length of fins conventional/desiccant coated(LDCHE and SDCHE) are experimentally investigated and compared with the heat and mass transfercharacteristics. Experimental results show that compared with the conventional heat exchanger, the heattransfer capacity of DCHE is reduced by 30% because of the heat resistance produced by desiccant coating.Pressure drop and Euler number are both increased by 60% approximately for the same reason. Doublingthe length of fins decreases the heat transfer coefficient by 50%, increases the average moisture removal by40% and pressure drop by 80%, without changing the other structure parameters. The coefficient ofdehumidification and regeneration performance both decrease with double length of fins. Long length offins can increase the capacity of dehumidification, decrease the capacity of heat transfer, and increaseenergy consumption.