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Le refroidissement par un système à absorption utilisant les gaz d'échappement et de l'eau froide.

Absorptiekoeling door uitlaatgassen en koelwater.

Auteurs : BOUAZZAOUI S., INFANTE FERREIRA C. A., LANGRECK J., et al.

Type d'article : Article

Résumé

Diesel engines on-board fishing trawlers produce significant quantities of heat. About 20% of the fuel energy is recoverable from the exhaust gases at 320-400°C and about 30% of the fuel energy is recoverable from the jacket coolant system at 75-100°C. On-board fishing vessels, there is a need for refrigeration. Rapid freezing requires low evaporating temperatures in the equipment used, generally plate freezers and air coolers in the related freezing stores. The evaporating temperature can then be as low as -50°C. At this evaporating temperature and heat rejection to the sea water, single-stage absorption cycles can only be driven by the hot exhaust gases and have very low COP's. The paper investigates the possibilities of a two-stage absorption resorption cycle to make optimal use of the recoverable heat available at the two different temperature levels. It gives a comparison between model results for the cooling capacity obtainable under different operating conditions for both single- and two-stage cycles. The two-stage option delivers approximately a 25% larger cooling capacity.

Détails

  • Titre original : Absorptiekoeling door uitlaatgassen en koelwater.
  • Identifiant de la fiche : 2009-0597
  • Langues : Néerlandais
  • Source : Koude & Luchtbehandeling - vol. 101 - n. 11
  • Date d'édition : 11/2008

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