Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Study on the Optimization of Absorption Performance of the Vertical Tube Absorber with Falling Film

수직 액막형 흡수기의 성능 최적화에 관한 연구

  • Kim, Jung-Kuk (Graduated School of Mechanical Engineering, Sungkyunkwan Univeristy) ;
  • Cho, Keum-Nam (School of Mechanical Engineering, Sunkyunkwan University)
  • Published : 2005.09.01
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Abstract

The present study investigated the optimization of the absorption performance of the vertical absorber tube with falling film by considering heat and mass transfer simultaneously. Effects of film Reynolds number, geometric parameters by insert device (spring) and flow pattern on heat and mass transfer performances have been also investigated. Especially, effects of coolant flow rate and the flow pattern by geometric parameters has been observed for the total heat and mass transfer rates through both numerical and experimental studies. Based on both predicted values, the optimal coolant flow rate was predicted as 1.98 L/min. The maximum absorption rate of the spring inserted tube was increased by the maximum of $20.0\%$ than those for uniform film of bare tube. Average Sherwood numbers and Nusselt numbers were increased as Reynolds numbers increased under the dynamic and geometric conditions showing the maximum absorption performance.

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References

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