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Méthodologie de modélisation robuste de type boîte grise pour les systèmes à détente directe à vitesse variable avec des données d'entraînement limitées.

A robust gray-box modeling methodology for variable-speed direct-expansion systems with limited training data.

Auteurs : LIU H., CAI J.

Type d'article : Article de la RIF

Résumé

Compared to physics-based models, the gray-box modeling approach has clear advantages including reduced engineering efforts in the model development phase, higher computational efficiency, improved accuracy and reduced uncertainties. In this paper, we present a gray-box steady-state modeling methodology for variable-speed direct-expansion systems that is robust against limited training data. The methodology incorporates a dual-stage training scheme, where component models are identified separately, and then integrated through continuity constraints to establish a system model trained on a higher hierarch. To further improve model reliability and robustness, the training methodology incorporates two commissioning techniques, i.e., significance ranking and de-correlation, to down-select the estimation parameters according to the quality of the training data. To demonstrate the efficacy, the proposed modeling methodology was applied to a 3-ton variable-speed heat pump. Qualities of the identified models were evaluated in terms of parameter accuracy and model prediction accuracy against variable training data sizes. Robustness of the methodology was demonstrated in achieving reasonable model accuracies with limited training data.

Documents disponibles

Format PDF

Pages : 128-138

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : A robust gray-box modeling methodology for variable-speed direct-expansion systems with limited training data.
  • Identifiant de la fiche : 30028704
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 129
  • Date d'édition : 09/2021
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2021.05.007
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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