Performance analysis of double stage evaporator/absorber for a large temperature difference absorption system

Chan Woo Park, Yong Tae Kang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The characteristics of double stage evaporator/absorber are studied to realize a large temperature difference absorption system. In the case of the double stage evaporator/absorber with the large temperature difference of the chilled water (15 °C/7 °C), the pressure of the lower stage in the evaporator/absorber is higher than that of the upper stage. And the concentration of the absorber for the double stage is lower than that for the single stage. If the solution flow ratio decreases with a constant concentration of strong solution of 63.7%, COP increases to 1.19 in the double stage system, which is 12.0% higher than that for the conventional system. When absorber and evaporator are divided by the same ratio, the optimum value of UAR for COP improvement is found to be 0.65.When absorber and evaporator are divided by different ratios, the optimum values of UARE and UARA are (0.6, 0.7).

Original languageEnglish
Pages (from-to)521-528
Number of pages8
JournalInternational Journal of Refrigeration
Volume33
Issue number3
DOIs
Publication statusPublished - 2010 May

Keywords

  • Absorption system
  • Calcul
  • Calculation
  • Chilled water
  • Coefficient de performance
  • Coefficient of performance
  • Différence de température
  • Double-stage system
  • Eau glacée
  • Eau-bromure de lithium
  • Parameter
  • Performance
  • Système biétagé
  • Système à absorption
  • Temperature difference
  • Water-lithium bromide
  • paramètre

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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