A semi-analytical model for performance evaluation of heat pipe photovoltaic thermal collectors
Amin Haji Hosseini
1
(
Department of Mechanical Engineering,
University of Sistan and Baluchestan, Zahedan, Iran.
)
Abdolhamid Bahr Peyma
2
(
Department of Civil Engineering,
University of Sistan and Baluchestan, Zahedan, Iran.
)
Faramarz Sarhaddi
3
(
Department of Mechanical Engineering,
University of Sistan and Baluchestan, Zahedan, Iran.
)
کلید واژه: Exergy analysis, Heat pipe, Photovoltaic thermal collector,
چکیده مقاله :
Photovoltaic thermal collectors connected to heat pipes produce thermal and electrical energy simultaneously. In this study, a semi-analytical model is developed for the energy and exergy performance evaluation of a photovoltaic thermal collector connected to heat pipes. The governing equations of the problem is obtained by writing energy balance for the various components of photovoltaic thermal collector (i.e. PV module, absorber plate, heat pipe). Also, an expression for the exergy efficiency of photovoltaic thermal collector is introduced. The results of the semi-analytical model of the present study are in good agreement with the experimental data of previous literature. Finally, parametric studies have been carried out and the effect of various operating and design parameters on energy and exergy efficiencies has been studied. The results show that the optimal flow rate of the photovoltaic thermal collector is 0.07 kg/s and the maximum exergy efficiency is 11.8%. Moreover, an increase in the wind speed and ambient temperature has a little effect on the energy efficiency and exergy efficiency of the system. Solar radiation intensity increases the energy efficiency and exergy efficiency.
چکیده انگلیسی :
Photovoltaic thermal collectors connected to heat pipes produce thermal and electrical energy simultaneously. In this study, a semi-analytical model is developed for the energy and exergy performance evaluation of a photovoltaic thermal collector connected to heat pipes. The governing equations of the problem is obtained by writing energy balance for the various components of photovoltaic thermal collector (i.e. PV module, absorber plate, heat pipe). Also, an expression for the exergy efficiency of photovoltaic thermal collector is introduced. The results of the semi-analytical model of the present study are in good agreement with the experimental data of previous literature. Finally, parametric studies have been carried out and the effect of various operating and design parameters on energy and exergy efficiencies has been studied. The results show that the optimal flow rate of the photovoltaic thermal collector is 0.07 kg/s and the maximum exergy efficiency is 11.8%. Moreover, an increase in the wind speed and ambient temperature has a little effect on the energy efficiency and exergy efficiency of the system. Solar radiation intensity increases the energy efficiency and exergy efficiency.
