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Résultats expérimentaux de réfrigérateurs solaires thermiques pour la conservation de vaccins en climat chaud fonctionnant avec un cycle à adsorption bi-étagé

Test results of solar thermal refrigerators for cooling vaccines in hot climates with a double-lift adsorption cycle.

Numéro : 0351

Auteurs : KÜHN R., FISCHER C., MÄHNE K., CHAUHAN P., GÖLLER C., NEZIR U., ROMER J., WITT B.

Résumé

In the paper at hand, test results of a solar heat driven off-grid medical refrigerator for hot climates of up to 43°C ambient temperature are presented and discussed. In a previous paper, test results of a solar thermal medical refrigerator for temperate climates (32°C ambient temperature) were presented. The recent refrigerator is cooled by a compact-size double-lift adsorption cycle with a simple control system. In contrast to other solar off-grid adsorption refrigerators, hot water from a standard solar thermal collector provides the energy required for the cooling cycle. This is sufficient even at high ambient temperatures due to the double-lift cycle, which lifts the vapor from the evaporator to the condenser pressure level in a two-stage adsorption process. Water and Silica gel are used as working pair.
Firstly, the configuration of Coolar’s double-lift adsorption system is introduced. Then test results are presented and discussed to infer potential advantages and drawbacks of the system.
The refrigerator shows a sufficient cooling capacity and temperature stability within 2 to 8°C at a constant ambient temperature of 43°C, which is the benchmark given by the World Health Organization’s (WHO) Performance, Quality & Safety process for off-grid vaccine refrigerators for hot climates. Furthermore, stable cold room temperatures between 2 and 8°C were achieved also during field tests under real weather conditions.

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Format PDF

Pages : 11

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    20 €

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    Gratuit

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Détails

  • Titre original : Test results of solar thermal refrigerators for cooling vaccines in hot climates with a double-lift adsorption cycle.
  • Identifiant de la fiche : 30031313
  • Langues : Anglais
  • Sujet : Technologie
  • Source : Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Date d'édition : 21/08/2023
  • DOI : http://dx.doi.org/10.18462/iir.icr.2023.0351

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