Performance study of polymeric dense membrane with a hydrophilic additive for energy efficient air conditioning
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As the demand for high-efficiency air conditioning systems from climate change around the world increases, there is a need for alternative technologies that can replace conventional steam compression cycles. Membrane heat pump has recently attracted attention as highly compatible alternative technologies due to the development of various water-permeable membranes that can dehumidify without releasing latent heat, since water molecules selectively permeate, leading to reduced energy consumption. We have developed polymer-based dense membrane with hydrophilic additives which provide a water vapor selective diffusion pathway. The membrane showed a high-water vapor permeable property (~190 g/m2∙hr) based on a standard method described in ASTM-E96. In this study, the water permeation property of the membrane was systematically investigated under various temperature and humidity conditions using vapor permeation performance test system consisting of water vapor supply and membrane chamber.