Partager

Document IIF

Étude de simulation sur la stabilité opérationnelle d’un système de conditionnement d’air à détente directe contrôlé par un détendeur électronique (EEV) fonctionnant à vitesse variable.

A simulation study on the operational stability of an EEV-controlled direct expansion air conditioning system under variable speed operation.

Auteurs : XIA Y., DING Q., SHU J., et al.

Type d'article : Article, Article de la RIF

Résumé

Hunting causes a poor operational safety and efficiency of a direct expansion (DX) air conditioning (A/C) system when it is variable speed (VS) operated to output different sensible and latent cooling capacities. An existing dynamic model was further developed by adding the equations for evaluating temperature sensor dynamics and air side operating parameters. After experimentally validated the model, the temperature sensor dynamics and VS operation on stability were numerically examined. Simulation results showed that due to the temperature sensor dynamics, actual system hunting could be much more serious than what was measured, and increasing the thermal resistance between temperature sensor and refrigerant pipeline would mitigate hunting. The mixture-vapor transition point in the DX evaporator would move closer to its exit at a smaller output equipment sensible heat ratio (E SHR) or a larger output total cooling capacity (TCC), consequently, leading to a higher chance to instability.

Documents disponibles

Format PDF

Pages : 115-125

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : A simulation study on the operational stability of an EEV-controlled direct expansion air conditioning system under variable speed operation.
  • Identifiant de la fiche : 30025881
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 103
  • Date d'édition : 07/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.04.007

Liens


Voir d'autres articles du même numéro (28)
Voir la source

Indexation