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Analyse thermodynamique des refroidisseurs à absorption : dissipation interne et température moyenne.

Thermodynamic analysis of absorption chillers: internal dissipation and process average temperature.

Auteurs : NG K. C., TU K., CHUA H. T., GORDON J. M., KASHIWAGI T., AKISAWA A., SAHA B. B.

Type d'article : Article

Résumé

Absorption chillers operate well below their reversible or endoreversible limits because their thermodynamic behaviour is dominated by internal dissipation, a significant part of which occurs in the chiller's heat exchangers. This fact has summarily been omitted from earlier analyses. It translates into incorrect values for the refrigerant process-average temperature, and leads to noticeable errors in chiller diagnostics and optimization. Using experimental measurements from an absorption chiller, in concert with a computer simulation code and an analytic thermodynamic model, the authors fortify these claims with quantitative examples. They also substantiate that commercial absorption chiller technology has empirically evolved to close to optimal operating conditions.

Détails

  • Titre original : Thermodynamic analysis of absorption chillers: internal dissipation and process average temperature.
  • Identifiant de la fiche : 1999-1551
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 18 - n. 8
  • Date d'édition : 08/1998

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