Numerical study of the effects of nanofluids and phase-change materials in photovoltaic thermal (PVT) systems

Almusawi, Ahmed; Taheri, Amin; Farzanehnia, Amin; Sardarabadi, Mohammad; Passandideh-Fard, Mohammad

doi:10.1007/s10973-018-7972-6

Cited by 100 publications

(23 citation statements)

References 43 publications

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“…AL-Musawi et al [35] numerically investigated the effects of pure water, SiO2/water nanofluid, and a phase-change material (PCM) as coolants on the performance of a photovoltaic thermal (PVT) system. Two modules of PVT and PVT/PCM were studied and compared using 3D simulations.…”

Section: Heat and Nanofluid Transfermentioning

confidence: 99%

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

Menni¹,

Chamkha²,

Lorenzini³

et al. 2019

MMEP

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This paper presents a detailed review of the numerical studies carried out by various researchers in order to obtain enhanced heat transfer in free, forced, and mixed convection, under laminar, transition, and turbulent flow regimes, by using nanofluids in different solar collector geometries. Recently, nanofluids have been increasingly used in various solar collector configurations. Nano-sized metallic or non-metallic particles such as Cu, Au, Al2O3, SiO2, TiO2, CuO, etc, were used in the heat transfer fluid for various solid volume fractions. The average size of the particles was less than 100 nm. The higher conductivity of nanoparticles even at low particle concentration results in higher thermal conductivity of the base fluid and improves the thermal characteristics of the system. Nanoparticle size, type and shape are important factors for the thermal conductivity enhancement of the nanofluid with nanoparticles.

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Section: Heat and Nanofluid Transfermentioning

confidence: 99%

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

Menni¹,

Chamkha²,

Lorenzini³

et al. 2019

MMEP

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“…Thermal conductivity typically depends on the percentage of nanoparticles and the PV cell operating temperature. 22,23 Hence it is typical that Brownian motion has the possibility to influence thermal conductivity of the nanofluids. The thermal conductivity ratio is given by the thermal conductivity of nanofluids to base fluid.…”

Section: Thermal Conductivitymentioning

confidence: 99%

“…In fact, at higher temperatures, the Brownian effects are more intense than lower temperatures and a solid volume fraction. 22,23 Hence it is typical that Brownian motion has the possibility to influence thermal conductivity of the nanofluids. Further, the increase in surface volume and the collision between the nanoparticles are also believed to be valid reasons for the increase in thermal conductivity.…”

Section: Thermal Conductivitymentioning

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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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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“…Exergy efficiency and cost ratio for the proposed system achieved 3.304% and $241.6 h −1 , respectively. Sardarabadi et al [ 9 ] in their experimental studies, they examined conventional PV system, photovoltaic (PV/PCM) system integrated with phase change material and photovoltaic thermal (PV/PCM) systems integrated with phase change material using different fluids. As a result, they revealed that the (PV/PCM) system's electrical energy increased by 4.22% compared to the PV system.…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic analysis of photovoltaic thermal systems based on phase change materials and natural zeolites for thermal management

Kandilli

Uzel

2021

J Therm Anal Calorim

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Conventional photovoltaic thermal (PVT) systems provide unstable thermal energy, which changes throughout the day. In PVT systems, phase change materials (PCMs) and heat storage materials could be used to make thermal energy more stable and provide longer-term thermal energy. In the present study, exergoeconomic analysis of PVT systems integrated with natural zeolites has been firstly carried out, and the results were compared with the results of PVT systems integrated with PCM and conventional one. PVT systems integrated with paraffin and stearic acid, common PCMs and conventional PVT systems were analyzed by specific exergy costing method, systems were compared exergoeconomically and suggestions were made to improve the economic performance of PVT systems. As a result of the analyzes conducted with 297 data obtained experimentally, the average energy efficiencies were calculated as 33%, 40%, 37% and 32% for paraffin, natural zeolite, stearic acid and conventional PVT system, respectively. Besides, average exergy efficiencies were 24%, 24%, 22% and 22% for paraffin, zeolite, stearic acid and conventional PVT system, respectively. The average entropy generation of the PVT based paraffin; natural zeolite, stearic acid and conventional one were found as 2.11, 2.29, 2.18 and 2.07 W K −1 , respectively. According to the exergoeconomic analysis, specific exergy flow cost values were found as 0.206, 0.176, 0.204 and 0.206 € kWh −1 for the PVTs based on paraffin, natural zeolite, stearic acid and the conventional PVT. It was concluded that the natural zeolite-based PVT system was found as the best system exergoeconomically.

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Numerical study of the effects of nanofluids and phase-change materials in photovoltaic thermal (PVT) systems

Cited by 100 publications

References 43 publications

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

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

Exergoeconomic analysis of photovoltaic thermal systems based on phase change materials and natural zeolites for thermal management

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