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Modélisation et étude expérimentale sur la performance hivernale d'un échangeur de chaleur sol-air : une source d'énergie alternative pour une serre.

Modelling and experimental study for winter performance of an earth to air heat exchanger: an alternative energy source for a greenhouse.

Auteurs : GHOSAL M. K., NAYAK S., TIWARI G. N., et al.

Type d'article : Article

Résumé

A complete numerical model has been developed to investigate the potential of using the stored thermal energy of ground for space heating with the help of an earth to air heat exchanger (EAHE) system integrated with the greenhouse located in the premises of IIT, Delhi, India. The analysis was based on the quasi-steady state condition. Experiments were conducted extensively during the winter period from November 2002 to March 2003, but the model, developed, was validated against the clear and sunny days. The performance of the system was evaluated in terms of total heating potential obtained from EAHE, COP and thermal load levelling. The heating potential of the system has also been standardized by the characteristic curve for a greenhouse similar to that of the flat plate collector. Temperatures of the greenhouse air were found to be on an average 7-8°C more than the same greenhouse when operating without an earth air heat exchanger. The temperature fluctuations of the greenhouse air were also less when operated with EAHE as compared to without EAHE. Predicted and measured values of the greenhouse air temperature in the model developed, exhibited fair agreement.

Détails

  • Titre original : Modelling and experimental study for winter performance of an earth to air heat exchanger: an alternative energy source for a greenhouse.
  • Identifiant de la fiche : 2008-2705
  • Langues : Anglais
  • Source : Agric. Eng. Int., CIGR E-J. - vol. 10 - n. EE 07 012
  • Date d'édition : 01/2008

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