Experimental investigation of the effects of using metal-oxides/water nanofluids on a photovoltaic thermal system (PVT) from energy and exergy viewpoints

Sardarabadi, Mohammad; Hosseinzadeh, Mohammad; Kazemian, Arash; Passandideh-Fard, Mohammad

doi:10.1016/j.energy.2017.07.046

Cited by 207 publications

(48 citation statements)

References 41 publications

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“…Similar trend was recently explained by Nasrin et al 22 The electrical output increases to peak from 12.30 PM to 1.00 PM and then starts to lose its heat and there is obvious drop in electrical output. In order to calculate the performance difference among nanofluids, the exergy values are calculated from the formula proposed by 25 and plotted in Figure 10. 13,22 For instance, at 1.00 PM the difference between MWCNT on Al 2 O 3 and CuO is 3% and 2%, respectively.…”

Section: Electrical Outputmentioning

confidence: 99%

“…The MWCNT showed greater overall efficiency than other nanofluids throughout the month. In order to calculate the performance difference among nanofluids, the exergy values are calculated from the formula proposed by 25 and plotted in Figure 10. The total exergy efficiency for the MWCNT is higher than other fluids due to the minimum loss and entropy.…”

Section: Electrical Outputmentioning

confidence: 99%

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Progress of MWCNT, Al ₂ O ₃ , and CuO with water in enhancing the photovoltaic thermal system

et al. 2019

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Hybrid photovoltaic thermal system is an effective method to convert solar energy into electrical and thermal energy. However, its effectiveness is widely affected due to the high temperature of photovoltaic panel, and it can be minimized by employing nanofluids to the PV/T systems. In this research, the effect of various nanoparticles on the PV/T systems was studied experimentally. The nanofluids Al 2 O 3 , CuO, and multiwall carbon nanotube (MWCNT) were dispersed with water at different volume fractions of 0, 0.5, 1, 2.5, and 5 (vol%) using ultrasonication process. The effect of nanomaterials on viscosity and density was classified. All tests were carried out in an outdoor laboratory setup for calibrating the PV temperatures, thermal conductivity, electrical power, electrical efficiency, and overall efficiency. In addition, the energy analyses were also made to estimate the loss of heat owing to the nanofluids. Results show that use of the nanofluid increased the electric power and electrical efficiency of PV/T compared with water. Furthermore, MWCNT and CuO reduced the cell temperature by 19%. Consequently, the nanofluids MWCNT, Al 2 O 3 , and CuO produced the impressive values of 60%, 55%, and 52% increase in an average electrical efficiency than conventional PV. Particularly, the MWCNT produced superior results compared with other materials. It is evidently clear from the result that the introduction of the nanofluid increases the thermal efficiency without adding any extra energy to the system. Moreover, insertion of Al 2 O 3 , CuO, and MWCNT on PV/T system increases the exergy efficiency more than conventional PV module.How to cite this article: Sangeetha M, Manigandan S, Chaichan MT, Kumar V. Progress of MWCNT, Al 2 O 3 , and CuO with water in enhancing the photovoltaic thermal system. Int J Energy Res.

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Section: Electrical Outputmentioning

confidence: 99%

Section: Electrical Outputmentioning

confidence: 99%

Progress of MWCNT, Al ₂ O ₃ , and CuO with water in enhancing the photovoltaic thermal system

et al. 2019

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“…The output thermal exergy of the PVT system ( _ Ex th ) is given by both Eqs. (15) and (16) [24,25]:…”

Section: Exergy Analysismentioning

confidence: 99%

Exergy in Photovoltaic/Thermal Nanofluid-Based Collector Systems

Farzanehnia¹,

Sardarabadi²

2019

Exergy and Its Application - Toward Green Energy Production and Sustainable Environment

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This chapter focuses on the exergy analysis of photovoltaic/thermal (PVT) systems using nanofluid. The PVT hybrid systems are designed to harness solar energy more efficiently. The thermodynamic theory of exergy in PVT systems is explained in details. The existing researches used various models to perform the exergy analysis for performance evaluation of the PVT systems. These models and formulations are compared with each other to achieve a widely used theory for a better comparison of the results. The exergy analysis is an effective tool to evaluate the performance of PVT systems. The exergy efficiency enhancement in PVT systems and the effect of nanofluid from the literature are presented. The literature survey suggests that the increase in the flow rate increases the exergy efficiencies in collector-based PVT. Using nanofluid as optical filters of solar radiation results in higher exergy efficiencies compared to collector-based PVT systems. According to the recent publications, the long-term thermophysical stability of nanofluid and cost-based exergy analysis still require further investigations.

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“…23 There are many different active and passive cooling methods to improve efficiency of PVT systems. While heat sink including thermoelectric generators, 24 microchannel PV cell, 25 using nanofluid, 26 using PCM, 27 direct liquid-immersion cooling, 28 thermosiphon system in a flat-box absorber, 29 using hybrid microchannel with nanofluid, [30][31][32] heat sink including nanofluid could be listed as passive cooling methods; jet impingement, water spraying, using ferrofluid and magnetic field and jet array nanofluids impingement could be considered active cooling system in the literature. [33][34][35][36] There are also some studies about focusing on the temperature effect and efficiency for PVT systems.…”

Section: Introductionmentioning

confidence: 99%

Energy, exergy, and economical analyses of a photovoltaic thermal system integrated with the natural zeolites for heat management

Kandilli

2019

Int J Energy Res

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Summary In this study, the first time in the literature, natural zeolite has been employed for photovoltaic thermal (PVT) and experimentally tested as a thermal energy storage material. The main aim of the paper is to introduce natural zeolite as a heat storage material for PVT systems. The PVT systems integrated with phase change materials and natural zeolite were designed, the components of the system were explained, the thermodynamical modelling including the first and second laws was presented, the system performances were evaluated, performance parameters were investigated, energy and exergy efficiencies were determined, and economical analyses of each system were performed. Besides, all results were compared with a conventional PVT system. The average overall energy efficiency values for PVT experiments were 33% for paraffin, 37% for stearic acid, 40% for zeolite, and 32% for conventional PVT systems. The payback period of the PVT system with paraffin, zeolite, stearic acid, and conventional PVT was calculated as 10, 8, 9, and 9 years, respectively. The results show that the natural zeolite is a material with significant potential to be used for heat management in PVT for any meteorological condition.

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Experimental investigation of the effects of using metal-oxides/water nanofluids on a photovoltaic thermal system (PVT) from energy and exergy viewpoints

Cited by 207 publications

References 41 publications

Progress of MWCNT, Al ₂ O ₃ , and CuO with water in enhancing the photovoltaic thermal system

Progress of MWCNT, Al ₂ O ₃ , and CuO with water in enhancing the photovoltaic thermal system

Exergy in Photovoltaic/Thermal Nanofluid-Based Collector Systems

Energy, exergy, and economical analyses of a photovoltaic thermal system integrated with the natural zeolites for heat management

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