Partager

Document IIF

Simulation numérique d'un système d'accumulation thermique de pointe employant le H2O-LiBr en tant que fluide actif. 1. Conception et modélisation du système.

Numerical simulation of an advanced energy storage system using H2O-LiBr as working fluid. 1. System design and modelling.

Auteurs : XU S. M., ZHANG L., XU C. H., et al.

Type d'article : Article, Article de la RIF

Résumé

This paper presents an advanced energy storage system using aqueous lithium bromide (H2O-LiBr) as working fluid. As one of VMETS systems, this system is a closed system using two storage tanks. It is used to shift electrical load and store energy for cooling, heating or combined cooling and heating. It is environmental friendly because the water is used as refrigerant in the system. Its working principle and process of energy transformation and storage are totally different from those of the traditional thermal energy storage (TES) systems. The electric energy in off-peak time is mostly transformed into the chemical potential of the working fluid and stored in the system firstly. And then the potential is transformed into cold or heat energy by absorption refrigeration or heat pump mode when the consumers need the cold or heat energy. The key to the system is to regulate the chemical potential by controlling the absorbent (LiBr) mass fraction or concentration in the working fluid with respect to time. As a result, by using a solution storage tank and a water storage tank, the energy transformation and storage can be carried out at the desirable time to shift electric load efficiently. Since the concentration of the working solution in the VMETS cycle varies continuously, the working process of the VMETS system is dynamic. As the first part of our study, the working principle and flow of the VMETS system were introduced first, and then the system dynamic models were developed. To investigate the system characteristics and performances under full-storage and partial-storage strategies, the numerical simulation will be performed in the subsequent paper. The simulation results will be very helpful for guiding the actual system and device design. See also this Bulletin, reference 2007-0175.

Documents disponibles

Format PDF

Pages : 354-363

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 : Numerical simulation of an advanced energy storage system using H2O-LiBr as working fluid. 1. System design and modelling.
  • Identifiant de la fiche : 2007-0174
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 2
  • Date d'édition : 03/2007

Liens


Voir d'autres articles du même numéro (17)
Voir la source

Indexation