Numerical Analysis of a Plate Type Generator for Ammonia/Water Absorption Refrigerators

암모니아/물 흡수식 냉동기의 판형 재생기의 수치해석

  • 지제환 (홍익대학교 대학원) ;
  • 정은수 (홍익대학교 기계.시스템디자인공학과) ;
  • 정시영 (서강대학교 기계공학과)
  • Published : 2001.06.27

Abstract

A numerical model which simulates the heat and mass transfer processes within a counter-current plate type generator for ammonia/water absorption refrigerators was developed. Ammonia/water solution flows downward under gravity and ammonia/water vapor generated by flow boiling flows upward. The flow pattern within the generator was assumed to be a bubbly flow, and the liquid and vapor phase were assumed to be saturated. It was shown that the boiling of ammonia occurred mainly in the upper part of the generator. The effects of the generator length, the wall temperature and the mass flow rate of ammonia/water solution into the generator on the generation of ammonia/water vapor were investigated.

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