In this paper an analytical model able to obtain the electrical and thermal performances of a hybrid photovoltaic thermal (PV/T) system is studied in order to evaluate and optimize different solutions of coupling of a PV/T module: with a condensing boiler or with condensing boiler and coil radiator on the floor. In particular, pre-heating the water at the input of the boiler, a decrease of the fuel consumption by 20% has been obtained using an optimized value of the sanitary hot water mass flow rate. A further decrease of fuel consumption up to about 50% has been obtained with more PV/T modules. The second application is related to the air heating. In particular, the possibility to supply a coil radiator on the floor with the thermal energy obtained by means of hybrid photovoltaic modules, has been evaluated. In particular, it has been determined an optimal size of the coil on the floor when the PV/T module works between the temperatures of 35 and 39°C; a circuit composed of PV/T module, boiler and coil radiator on the floor has been analyzed getting a high fuel saving in comparison with the solution without PV/T module. Hence, the advantages of a PV/T module are evaluated from the energy point of view, once determined the optimum water mass flow rate by means of the fuzzy logic.
Analysis and optimization of a hybrid photovoltaic thermal system
RENNO, Carlo
2012-01-01
Abstract
In this paper an analytical model able to obtain the electrical and thermal performances of a hybrid photovoltaic thermal (PV/T) system is studied in order to evaluate and optimize different solutions of coupling of a PV/T module: with a condensing boiler or with condensing boiler and coil radiator on the floor. In particular, pre-heating the water at the input of the boiler, a decrease of the fuel consumption by 20% has been obtained using an optimized value of the sanitary hot water mass flow rate. A further decrease of fuel consumption up to about 50% has been obtained with more PV/T modules. The second application is related to the air heating. In particular, the possibility to supply a coil radiator on the floor with the thermal energy obtained by means of hybrid photovoltaic modules, has been evaluated. In particular, it has been determined an optimal size of the coil on the floor when the PV/T module works between the temperatures of 35 and 39°C; a circuit composed of PV/T module, boiler and coil radiator on the floor has been analyzed getting a high fuel saving in comparison with the solution without PV/T module. Hence, the advantages of a PV/T module are evaluated from the energy point of view, once determined the optimum water mass flow rate by means of the fuzzy logic.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
