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Gestion améliorée de l'énergie pour les systèmes de refroidisseurs avec analyse par enveloppement des données.

Improved energy management of chiller systems with data envelopment analysis.

Auteurs : YU F. W., CHAN K. T.

Type d'article : Article

Résumé

The operation of chiller systems could take up over half of the electricity consumption of air-conditioned buildings in subtropical regions. This paper explains how to examine the effectiveness of their energy management by using data envelopment analysis (DEA). A large-scale system with seven chillers of two different capacitieswas studied. The scale, technical and overall efficiencies defined in DEAwere calculated for each set of operating conditions comprising the system coefficient of performance (COP) and input variables: the compressor power, chiller load and temperatures at the evaporator and condenser sides.Under the existing operating strategy, the average system COP was found to be 5.73 with an average technical efficiency of 0.97. This indicates that the system operated very efficiently for most of the time. Fine-tuning the temperaturerelated controllable variables could achieve the highest possible COP of 5.83 with technical efficiency of one. The benefits of using technical efficiency to identify energy management opportunities are highlighted.

Détails

  • Titre original : Improved energy management of chiller systems with data envelopment analysis.
  • Identifiant de la fiche : 30006034
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 50 - n. 1
  • Date d'édition : 01/2013
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2012.08.023

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