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Utilisation d’un algorithme en temps réel pour déterminer la haute pression optimale des systèmes au R744.

A real-time algorithm for the determination of R744 systems optimal high pressure.

Auteurs : CECCHINATO L., CORRADI M., COSI G., et al.

Type d'article : Article, Article de la RIF

Résumé

In this paper, the optimal energy efficiency and high pressure problem in single stage transcritical carbon dioxide vapour compression units is addressed. A real-time model-based optimisation algorithm for the optimal (or quasi-optimal, close to the optimal) pressure determination is developed as a more efficient and robust solution than literature approximated ones. The problem is solved by a model estimating the system performance and by measuring its boundary conditions. The model is obtained by an on-line artificial neural network identification technique and the optimisation problem is worked out by a particle swarm technique. The proposed algorithm is dynamically tested by simulation, considering the performance of a supply water temperature controlled carbon dioxide heat pump. It appears to successfully approximate the optimal cycle discharge pressure showing an average daily pressure deviation of 0.9 × 10^5 Pa over a two years simulation period, corresponding to 1.1% increase in the cumulated energy consumption, compared to the optimal pressure solution.

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Pages : 817-826

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    20 €

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    Gratuit

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Détails

  • Titre original : A real-time algorithm for the determination of R744 systems optimal high pressure.
  • Identifiant de la fiche : 30003993
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 35 - n. 4
  • Date d'édition : 06/2012

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