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Experimental investigation of the effects of silica/water nanofluid on PV/T (photovoltaic thermal units)

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  • Sardarabadi, Mohammad
  • Passandideh-Fard, Mohammad
  • Zeinali Heris, Saeed

Abstract

In this research, the effects of using nanofluid as a coolant on the thermal and electrical efficiencies of a PV/T (photovoltaic thermal unit) are experimentally studied. Coolant fluids in the experiments are pure water and silica (SiO2)/water nanofluid 1% and 3% by weight (wt%). A brief uncertainty analysis is performed which shows that the measurements are sufficiently accurate. By converting the output electrical energy of the PV/T system into an equivalent thermal energy, it is found that the overall energy efficiency for the case with a silica/water nanofluid of 1 wt% is increased by 3.6% compared to the case with pure water. When using the silica/water nanofluid of 3 wt%, however, the increase is 7.9%. The thermal efficiency of the PV/T collector for the two cases of 1 wt% and 3 wt% of silica/water nanofluids are increased by 7.6% and 12.8%, respectively. The total exergy of the PV/T system, with and without nanofluids, is also compared with that of the PV system with no collector. It is observed that by adding a thermal collector to a PV system, the total exergy for the three cases with pure water, 1 wt% silica/water nanofluid, and 3 wt% silica/water nanofluid is increased by 19.36%, 22.61% and 24.31%, respectively.

Suggested Citation

  • Sardarabadi, Mohammad & Passandideh-Fard, Mohammad & Zeinali Heris, Saeed, 2014. "Experimental investigation of the effects of silica/water nanofluid on PV/T (photovoltaic thermal units)," Energy, Elsevier, vol. 66(C), pages 264-272.
    • Handle: RePEc:eee:energy:v:66:y:2014:i:c:p:264-272
    DOI: 10.1016/j.energy.2014.01.102
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    References listed on IDEAS

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