A real-time algorithm for the determination of R744 systems optimal high pressure (Articolo in rivista)

Type
Label
  • A real-time algorithm for the determination of R744 systems optimal high pressure (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.ijrefrig.2012.01.005 (literal)
Alternative label
  • Luca Cecchinato ; Marco Corradi ; Giovanni Cosi ; Silvia Minetto ; Mirco Rampazzo (2012)
    A real-time algorithm for the determination of R744 systems optimal high pressure
    in International journal of refrigeration
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Luca Cecchinato ; Marco Corradi ; Giovanni Cosi ; Silvia Minetto ; Mirco Rampazzo (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 35 (literal)
Rivista
Note
  • copu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Fisica Tecnica, Universita` di Padova, via Venezia 1, I-35131 Padova, Italy Dipartimento di Ingegneria dell'Informazione, Universita` di Padova, via Gradenigo 6/B, I-35131 Padova, Italy (literal)
Titolo
  • A real-time algorithm for the determination of R744 systems optimal high pressure (literal)
Abstract
  • 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 × 105 Pa over a two years simulation period, corresponding to 1.1% increase in the cumulated energy consumption, compared to the optimal pressure solution. (literal)
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