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Simulation of Heat and Mass Transfer Process in Falling Film Single Tube Absorption Generator

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2012

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
The objective of this paper is to introduce correlations for the Nusselt (heat transfer) and Sherwood (mass transfer) Numbers for a falling film of Li/Br solution over a single horizontal heated tube used in generator of absorption chillers. The analysis is based on laminar flow of Li/Br solution on a horizontal single tube having constant tube wall temperature. The effect of boiling has been ignored and free surface of falling film Li/Br solution is assumed to be saturated. The role of liquid impingement on the top of tube has been considered. The correlations are derived from an extensive numerical code based on finite difference scheme. The Nusselt and Sherwood Number for Li/Br solution falling film over the heated tube are obtained as a function of Prandtl Number, Schmidt number and Tube geometry The results showed that the Sherwood number is linearly proportion to Re number and is proportion to inverse of Dimensionless diameter of tube. Also the Nusselt Number is increase with increasing Re number and is independent of Schmidt number of Li/Br solution. A comparison of the correlations with existing experimental and analytical results is presented and verifies the validation of the present model.
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  • 3
79-84
  • English

REFERENCES

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