Energy and exergy analysis of the PVT system: Effect of nanofluid flow rate

Fayaz, Hussain and Nasrin, Rehena and Rahim, Nasrudin Abd and Hasanuzzaman, Md. (2018) Energy and exergy analysis of the PVT system: Effect of nanofluid flow rate. Solar Energy, 169. pp. 217-230. ISSN 0038-092X

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Official URL: https://doi.org/10.1016/j.solener.2018.05.004

Abstract

Solar energy is one of the promising resources to fulfil the energy demands to some level in place of fossil fuels to avoid environmental pollution. The efficiency of solar technology, e.g. photovoltaic panels, thermal systems or a combination of both technologies as photovoltaic thermal is a concern to increase at an optimum level. A three-dimensional numerical analysis of PVT systems using water and MWCNT-water nanofluid has been completed with FEM based software COMSOL Multiphysics®. A numerical investigation has been validated by the indoor experimental research at different mass flow rates of 30 to 120 L/h while keeping solar irradiation fixed at 1000 W/m2, inlet fluid and ambient temperature at 32 and 25 °C, respectively. Percent improvement of electrical efficiency of PV with nanofluid cooling at flow rate 120 L/h is obtained about 10.72 and 12.25% of numerical and experimental cases respectively. Optimization of the nanofluid for weight concentration is achieved at 0.75% MWCNT-water. Solar cell temperature reduces about 0.72 °C experimentally and 0.77 °C numerically per 10 L/h flow rate increment. Approximately 7.74 and 6.89 W thermal energy is enhanced per 10 L/h flow rate increment in numerical and experimental studies respectively. Percentage increment of thermal efficiency is found as 5.62% numerically and 5.13% experimentally for PVT system operated by water/MWCNT nanofluid with compared to water.

Item Type: Article
Uncontrolled Keywords: PVT system; MWCNT-water nanofluid; Energy; Exergy; Efficiency
Subjects: Q Science > QA Mathematics
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > UM Power Energy Dedicated Advanced Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 Aug 2019 01:50
Last Modified: 27 Aug 2019 01:50
URI: http://eprints.um.edu.my/id/eprint/22084

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