Study on absorption heat pump using hydrophobic membrane

对溴化锂/水溶液吸收水蒸气的传热传质过程进行了实验研究。金属泡沫附着在冷却壁上，吸收液体在金属泡沫中流动。金属模板被一层疏水薄膜覆盖，通过该薄膜将蒸汽吸收到吸收液体中。作为金属形式换热的基础，测量了液体单相强制对流、冷凝和蒸发的换热系数。测量了水蒸气通过膜的压力损失，并与理论值进行了比较。阐明了膜对液体吸收水蒸气的影响。

Heat and mass transfer in water vapor absorption into LiBr/water solution has been investigated experimentally. Metal foam was attached on the cooling wall, and the absorbent liquid flows in the metal foam. The metal form was covered with a hydrophobic membrane, through which the vapor was absorbed into the absorbent liquid. As a basis of heat transfer in the metal form, heat transfer coefficients were measured for liquid single-phase forced convection, condensation and evaporation. The pressure loss of vapor passing through the membrane was measured and compared with theoretical value. The effect of membrane on the vapor absorption into liquid was clarified.