Paper membranes have long been used in an enthalpy exchanger. However, there has been a continuous concern on the durability or the anti-bacterial performance. In this study, heat and moisture transfer characteristics of a recently-developed PE/PA (polyethylene/polyacetate) composite membrane was investigated as a possible substitute to the paper membrane. Results showed that the diffusion coefficients of the PE/PA membrane (7.7 × 10⁻¹⁰ m²/s to 1.8 × 10⁻⁹ m²/s) were higher than those of the paper membrane (1.8 × 10⁻¹¹ m²/s to 6.0 × 10⁻¹¹ m²/s). Furthermore, the diffusion coefficient increased as relative humidity increased, reached a maximum at 50 % to 60 % and then decreased. For PE/PA membrane, the sorption constant increased as temperature increased, which was the reversed trend to the paper membrane. Successful prediction of the moisture transfer effectivenesses of the separate pseudo-counter flow enthalpy exchangers further strengthened the validity of the obtained diffusion coefficients.

纸膜长期以来一直用于焓交换器中。但是，人们对耐久性或抗菌性能一直存在担忧。在这项研究中，研究了一种新开发的PE / PA（聚乙烯/聚乙酸酯）复合膜的传热和水分传递特性，可以替代纸膜。结果表明，PE / PA膜的扩散系数（7.7×10 ^-10 m ² / s至1.8×10 ^-9 m ² / s）高于纸膜（1.8×10 ^-11 m ² / s）。s至6.0×10 ^-11 m ²/ s）。此外，扩散系数随着相对湿度的增加而增加，在50％至60％时达到最大值，然后降低。对于PE / PA膜，其吸附常数随温度的升高而增加，这是与纸膜相反的趋势。成功预测单独的伪逆流式焓交换器的水分传递效率，进一步增强了所获得的扩散系数的有效性。