Partager

Détermination de la puissance frigorifique en mesurant les variations massiques de la vapeur adsorbée : comparaison de la corrélation entre la puissance frigorifique et l’adsorption massique et la mesure de puissance de la boucle de fluide externe.

Cooling power determination by measuring the adsorbed vapor mass variations: comparison of mass adsorption cooling power correlation and external fluid loop power measurement.

Numéro : AD-CO-1092

Auteurs : GANTENBEIN P., DAGUENET-FRICK X., BONT F., et al.

Résumé

The cooling power of a closed solid sorbent – vapor/liquid sorbate system is depending on the thermo-physical properties of the material combination sorbent – sorbate and of the external heat sources and sinks. Beside the afore mentioned conditions, the geometrical structure of the sorbent - vapor flow configuration and the heat transfer in both the sorbent arrangement to a heat exchanger and in the liquid sorbate container are dominating power determining design requirements. A single vacuum chamber adsorption-desorption facility was designed and setup. The water vapor uptake in 7.5 kg of spherical shaped Fuji RD Silica Gel particles was measured in the adsorption-desorption fixed-bed hanging module by means of a beam balance. Considering the heat of evaporation, the cooling power was calculated and reached 1.5 kW or higher values. The comparison with the external fluid loop power – the evaporator power – showed good agreement. From another side, comparing the vapor mass uptake in this adsorption-desorption module with data from a single particle experiment shows a relative lower time resolved mass increase in the fixed bed. On the other hand a far longer possible adsorption (and desorption) cycle time – with a decreasing cooling power – is possible. This behavior can be explained by a pressure drop in the vapor flowing through the fixed bed and thus a longer time until saturation of all the sorbent particles – in the center of the module. With this setup the adsorption-desorption module – and the evaporatorcondenser unit – can be characterized and optimized.

Détails

  • Titre original : Cooling power determination by measuring the adsorbed vapor mass variations: comparison of mass adsorption cooling power correlation and external fluid loop power measurement.
  • Identifiant de la fiche : 30022805
  • 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