The electricity consumption due to building air-conditioning has relevantly increased. As an alternative to conventional air-conditioning systems, thermally driven chillers may be used, as they are suitable for being driven by free thermal energy, for example available from a solar plant. In this paper the performance of a cooling system based on a low-capacity water-cooled LiBr/H2O absorption chiller is studied. Optimization parameters are calculated under different operating conditions (hot water feeding temperature), and compared to the values obtained in case a conventional air-cooled vapour compression chiller was installed in place of the absorption machine. The analysis is performed through a dynamic model of the absorption machine and the other components, implemented on the simulation platform SimSpark. Finally, in the hypothesis of coupling the system to a solar section for hot water production, the minimum collector surface is assessed, which would make the system competitive in comparison with the conventional solution.
Rafraischissment par machine à absorption: opportunité d'une climatisation solaire
Evola Gianpiero;Marletta Luigi
2013-01-01
Abstract
The electricity consumption due to building air-conditioning has relevantly increased. As an alternative to conventional air-conditioning systems, thermally driven chillers may be used, as they are suitable for being driven by free thermal energy, for example available from a solar plant. In this paper the performance of a cooling system based on a low-capacity water-cooled LiBr/H2O absorption chiller is studied. Optimization parameters are calculated under different operating conditions (hot water feeding temperature), and compared to the values obtained in case a conventional air-cooled vapour compression chiller was installed in place of the absorption machine. The analysis is performed through a dynamic model of the absorption machine and the other components, implemented on the simulation platform SimSpark. Finally, in the hypothesis of coupling the system to a solar section for hot water production, the minimum collector surface is assessed, which would make the system competitive in comparison with the conventional solution.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
