Environmental and exergy benefit of nanofluid-based hybrid PV/T systems
| Autor: | Samir Hassani, Robert A. Taylor, Saad Mekhilef, Rahman Saidur |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Exergy
Engineering Renewable Energy Sustainability and the Environment business.industry 020209 energy Nuclear engineering Photovoltaic system Energy Engineering and Power Technology Thermodynamics 02 engineering and technology 021001 nanoscience & nanotechnology 7. Clean energy Coolant Photovoltaic thermal hybrid solar collector Fuel Technology Nanofluid Nuclear Energy and Engineering 13. Climate action Hybrid system Thermal 0202 electrical engineering electronic engineering information engineering 0210 nano-technology business Thermal energy |
| Zdroj: | Energy Conversion and Management. 123:431-444 |
| ISSN: | 0196-8904 |
| Popis: | Photovoltaic/thermal (PV/T) solar systems, which produce both electrical and thermal energy simultaneously, represent a method to achieve very high conversion rates of sunlight into useful energy. In recent years, nanofluids have been proposed as efficient coolants and optical filter for PV/T systems. Aim of this paper is to theoretically analyze the life cycle exergy of three different configurations of nanofluids-based PV/T hybrid systems, and compare their performance to a standard PV and PV/T system. Electrical and thermal performance of the analyzed solar collectors was investigated numerically. The life cycle exergy analysis revealed that the nanofluids-based PV/T system showed the best performance compared to a standard PV and PV/T systems. At the optimum value of solar concentration C , nanofluid-based PV/T configuration with optimized optical and thermal properties produces ∼1.3 MW h/m 2 of high-grade exergy annually with the lowest exergy payback time of 2 years, whereas these are ∼0.36, ∼0.79 MW h/m 2 and 3.48, 2.55 years for standard PV and PV/T systems, respectively. In addition, the nanofluids-based PV/T system can prevent the emissions of about 448 kg CO 2 eq m −2 yr −1 . Overall, it was found that the nanofluids-based PV/T with optimized optical and thermal properties has potential for further development in a high-concentration solar system. |
| Databáze: | OpenAIRE |
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