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Modelling of a real CO2 booster installation and evaluation of control strategies for heat recovery applications in supermarkets.

Modélisation de l’installation d’un booster de CO2 en conditions réelles et évaluation des stratégies de régulation pour des applications de récupération de chaleur dans les supermarchés.

Auteurs : SARABIA ESCRIVA E. J., ACHA S., LE BRUN N., et al.

Type d'article : Article, Article de la RIF, Étude de cas

Résumé

This paper compares and quantifies the energy, environmental and economic benefits of various control strategies recovering heat from a CO2 booster system in a supermarket for space heating with the purpose of understanding its potential for displacing natural gas fuelled boilers. A theoretical steady-state model that simulates the behaviour of the CO2 system is developed and validated against field measurements obtained from an existing refrigeration system in a food-retail building located in the United Kingdom. Five heat recovery strategies are analysed by modifying the mass flow and pressure level in the condenser. The model shows that a reduction of 48% in natural-gas consumption is feasible by the installation of a de-superheater and without applying any advanced operating strategy. However, the CO2 system can fully supply the entire space-heating requirements by adopting alternative control strategies, albeit by penalising the coefficient of performance (COP) of the compressor. Results show that the best energy strategy can reduce total consumption by 32%, while the best economic strategy can reduce costs by 6%. Findings from this work suggest that heat recovery systems can bring substantial benefits to improve the overall efficiency of energy-intensive buildings; nevertheless trade-offs need to be carefully considered and analysed on a site by site basis before embarking on such initiatives.

Documents disponibles

Format PDF

Pages : 288-300

Disponible

  • Prix public

    15 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : Modelling of a real CO2 booster installation and evaluation of control strategies for heat recovery applications in supermarkets.
  • Identifiant de la fiche : 30026985
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 107
  • Date d'édition : 11/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.08.005

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