水平管上を流下する臭化リチウム水溶液膜への水蒸気の吸収

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  • Absorption of water vavor into a film of aqueous LiBr solution falling on a horizontal pipe.
  • スイヘイカンジョウ オ リュウカスル シュウカ リチウム スイヨウ エキマク

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説明

The improvement of absorbers is necessary for the LiBr-water absorption chiller; but the fundamental values, such as the mass transfer coefficients and the heat transfer coefficients in the absorber having horizontal tube banks as cooling tubes, are not well known. The aim of this paper is to propose and analytical model of a single-tube case and to compare it with the experiments. The absorbent flow is assumed to have the same velocity profile over the inclined flat plate. The boundary conditions at the film surface are extended from the vertical flat plate case. The conducted experimental range of parameters are Γ=0.005-0.07 kg/(m·s), Tf=26-38°C and p=5-6 Torr. The obtained absorption rates are compared with the theoretical predictions. Mass transfer coefficients and heat transfer coefficients are found to lie in the range of (0.5-1.5)×10-4m/s and 2.0-2.5kW/(m2·K), respectively.

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