The paper aims at determining the model of an ejector cooling system driven by a concentrating photovoltaic collector; a single-stage ejector is considered. The concentrating photovoltaic modules represent a technological innovation much used at present. They allow to obtain electric energy with higher values of efficiency and modules temperature respect to traditional photovoltaic modules; hence, the thermal energy can drive processes such as solar cooling. On the contrary they need a major maintenance, and the use of this typology of modules is preferable where the climate is not wet. The model input data are the outdoor temperature and solar irradiation values of some Italian sample cities; the model output data are: solar collector efficiency, evaporation power, COP and COPoverall. Moreover, the ejector entrainment ratio and the temperature and pressure values at the condenser inlet, are determined. In order to realize a comparison between this typology of system with a traditional cooling system, a thermoeconomic analysis is realized by using exergoeconomic balances that allow to obtain the product cost of both systems.
A model of an ejector cooling system with concentrating photovoltaic collector
RENNO, Carlo
2012-01-01
Abstract
The paper aims at determining the model of an ejector cooling system driven by a concentrating photovoltaic collector; a single-stage ejector is considered. The concentrating photovoltaic modules represent a technological innovation much used at present. They allow to obtain electric energy with higher values of efficiency and modules temperature respect to traditional photovoltaic modules; hence, the thermal energy can drive processes such as solar cooling. On the contrary they need a major maintenance, and the use of this typology of modules is preferable where the climate is not wet. The model input data are the outdoor temperature and solar irradiation values of some Italian sample cities; the model output data are: solar collector efficiency, evaporation power, COP and COPoverall. Moreover, the ejector entrainment ratio and the temperature and pressure values at the condenser inlet, are determined. In order to realize a comparison between this typology of system with a traditional cooling system, a thermoeconomic analysis is realized by using exergoeconomic balances that allow to obtain the product cost of both systems.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
