DEHUMIDIFICATION WITH MEMBRANE BY VENTILATION IN BASEMENT

Environmental control of basement by heating and dehumidifying the air is widely used in summer. In general, ventilation can make the air more humid. From the point of view of energy saving, it is suggested to exchange humidity and to insulate heat between stale air and fresh air during ventilating basement. To improve the efficient of the exchanging system, the characteristics of heat and mass transfer of membrane device are studied. It is presented that the membrane device exchange system not only can keep the heat but also can remove moisture of the fresh air. It is studied that theoretically the mechanism and performance of the dehumidifier with a porous plastic film as a key element by bi-directional ventilation, its characteristic curves are worked out. The dehumidifier element developed with domestic techniques currently&

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