To limit climate change, the use of renewable energy is mandatory. PV/T systems generate renewable energy, simultaneously satisfy both the thermal and electrical energy requests. Usually, these systems have some limitations to fulfill the thermal energy needs; therefore, it is necessary to improve their efficiency with the aim to increase the enthalpy level of the energy produced. In this paper, the effects of changing the cooling fluid from pure water to a nanofluid composed by water and aluminum oxide (Al2O3) in a PV/T system are studied. The analysis is based on the thermodynamics viewpoint, considering both the total energy produced and its quality. The thermal level achievable by changing the heat transfer fluid, as well as the electrical efficiency considering various input conditions has been calculated. Finally, the energy yield produced by a conventional PV/T plant, which use pure water (PV/T)w and the proposed improved PV/T plant, which use pure the nanofluid (PV/T)nf, under real climate conditions have been compared. Such comparison was developed taking into account the second law of thermodynamics as well as the exergy analysis.

Analysis of the energy produced and energy quality of nanofluid impact on photovoltaic-thermal systems

Aneli S.
Membro del Collaboration Group
;
Gagliano A.
Membro del Collaboration Group
;
Tina G. M.
Membro del Collaboration Group
;
2020

Abstract

To limit climate change, the use of renewable energy is mandatory. PV/T systems generate renewable energy, simultaneously satisfy both the thermal and electrical energy requests. Usually, these systems have some limitations to fulfill the thermal energy needs; therefore, it is necessary to improve their efficiency with the aim to increase the enthalpy level of the energy produced. In this paper, the effects of changing the cooling fluid from pure water to a nanofluid composed by water and aluminum oxide (Al2O3) in a PV/T system are studied. The analysis is based on the thermodynamics viewpoint, considering both the total energy produced and its quality. The thermal level achievable by changing the heat transfer fluid, as well as the electrical efficiency considering various input conditions has been calculated. Finally, the energy yield produced by a conventional PV/T plant, which use pure water (PV/T)w and the proposed improved PV/T plant, which use pure the nanofluid (PV/T)nf, under real climate conditions have been compared. Such comparison was developed taking into account the second law of thermodynamics as well as the exergy analysis.
978-981-15-6258-7
978-981-15-6259-4
Numerical model
WISC PV/T collector, nanofluid
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11769/482181
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? ND
social impact