Study on absorption heat pump using hydrophobic membrane

• Project/Area Number: 23560218
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: NAGASAKI Takao 東京工業大学, 総合理工学研究科(研究院), 准教授 (30155923)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 吸収式ヒートポンプ / 吸収器 / 発泡金属 / 多孔質膜

Research Abstract

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.