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Performance analysis of a hybrid air-conditioning system in different climatic conditions.

Analisi prestazionale di un impianto di condizionamento ibrido in differenti condizioni climatiche.

Author(s) : BERGERO S., CHIARI A.

Summary

In previous papers it has been demonstrated by the authors that significant energy savings can be achieved in air conditioning through the use of a "hybrid" plant, in which a vapour-compression inverse cycle is integrated with an air dehumidification system working with hygroscopic solution and hydrophobic membrane. The advantage of such system lies in the fact that the refrigeration device operates at a higher evaporation temperature than that of a traditional system in which dehumidification is achieved through condensation. The proposed hybrid system operates as follows: the air conveyed to the conditioned ambient is simultaneously cooled and dehumidified in an air-solution membrane contactor. The LiCl solution is cooled by means of a vapour-compression inverse cycle using the refrigerant KLEA 407C. The solution is regenerated in another membrane contactor by exploiting the exhaust air and the heat rejected by the condenser. The aim of the paper is to study the performances of the system in summer conditions on varying the latent load of the conditioned ambient and the external relative humidity and to compare them with those of a traditional direct-expansion air-conditioning plant. The results of the simulations revealed that energy saving may exceed 60% when the vapour production into the conditioned environment is high.

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Pages: 681-694

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Details

  • Original title: Analisi prestazionale di un impianto di condizionamento ibrido in differenti condizioni climatiche.
  • Record ID : 2009-2444
  • Languages: Italian
  • Source: Impianti, energia e ambiente costruito: verso un benessere sostenibile. Atti 47° Congresso Internazionale AICARR: 8-9 ottobre 2009, Tivoli-Roma./ Systems, energy and built environment: toward a sustainable comfort. Proceedings 47th International Congress of AICARR: October 8-9, 2009, Tivoli-Rome.
  • Publication date: 2009/10/08

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