Absorption of Water Vapor into a Film of Aqueous Solution of LiBr Falling along a Vertical Pipe.

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  • 垂直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
  • スイチョクカンジョウ 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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The heat transfer surface used in the experiments was a chrome-plated smooth brass pipe of 28mm in diameter and 1400mm in length. The film Reynolds numbers were varied in the range of 40-400, which includes the range of real machines. The average absorption mass flux is compared with the numerical results derived from the laminar flow model proposed in the previous paper. The agreement is good up to 100 in Ref, but the experimental values are far higher above 200. This may be attributed to the wave motions on the film surface. Pictures show that the film is completely smooth only below 20. Beyond 20, ring-shaped waves appear, but the surfaces between the waves are relatively smooth for Ref below 200. The measurements of film the thickness show that its minimum is constant at about 0.38mm, but its maximum thickness increases for Ref beyond 60.

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