Performance Study Of Membrane-based Air To Air Enthalpy Exchanger

As one of the best Energy Recovery Ventilators in the field of air conditioning, the static type of air-to-air enthalpy exchangers have been applied widely for a long time overseas. But the technology was not yet mature in china, and it has never been paid attention to until recent years for the reason that building energy conservation and indoor air quality were concerned.The standards of foreign energy recovery units were compared and the evaluation methods of enthalpy exchangers were studied. A general physical model was developed to analyze the process of heat and mass transfer and the loss of pressure of thermal exchanger core. The exchange effectiveness and loss of pressure were calculated by using of VB to analyze the relating factors of affecting performance such as materials physics performance, channel shape, floor height, shape dimension, face velocity and outdoor conditions.The performance experiments results of 15 kinds of new materials were studied, 6 of which were made into enthalpy exchangers to have the core performance test. According to the performance experiments results, theoretical model was confirmed. Meanwhile, the performance of the new enthalpy exchanger whose structure was improved was compared with the original products through experiments.The traditional typical winter and summer method has been proved not to be reasonable for the close relationship between weather condition and enthalpy exchanger effectiveness. As a result, the best running time of enthalpy exchangers is brought forward. At last, an air-conditioning system in Shanghai district is studied to analyze the application of enthalpy exchangers.