Partager

L'adsorbant optimal pour les cycles de refroidissement à adsorption.

The optimal adsorbent for adsorption chiller cycles.

Numéro : AD-YRI-1090

Auteurs : GRAF S., BAU U., ERDOGAN M., et al.

Résumé

Adsorption chillers are an environmental-friendly alternative to conventional compression chillers. However, adsorption chillers exhibit low coefficients of performance (COP) and low specific cooling power (SCP) [1]. Both, COP and SCP depend strongly on the equilibrium data of the adsorbent: a high loading difference is beneficial for COP; a step-wise adsorption isobar ensures a high temperature difference between the adsorbent and the heat source/sink throughout the cycle, resulting in high SCP-values [2, 3]. This relation was studied in detail by Okunev et al. who modeled a step-wise adsorption isobar and simulated the resulting isobaric adsorption and desorption stages [4, 5]: Due to the step-wise adsorption isobar, heat transfer increases. Hence, the time for adsorption and desorption was shortened by factor 3 compared to common adsorbents, leading to the expectation that SCP would increase by the same factor. They further found that the adsorption time is only a factor 1.3 longer than the desorption time, compared to factor 2 for common adsorbents. Equal adsorption and desorption times allow for simple control and easier integration of heat and mass recovery.

Détails

  • Titre original : The optimal adsorbent for adsorption chiller cycles.
  • Identifiant de la fiche : 30022986
  • Langues : Anglais
  • Source : International sorption heat pump conference, ISHPC 2017, Tokyo august 7-10.
  • Date d'édition : 07/08/2017

Liens


Voir d'autres communications du même compte rendu (159)
Voir le compte rendu de la conférence

Indexation