The hybrid nanofluid/microchannel cooling solution for concentrated photovoltaic cells

Lelea, Dorin; Calinoiu, Delia; Trif-Tordai, G.; Cioablă, Adrian Eugen; Laza, Ioan; Popescu, Francisc

doi:10.1063/1.4908592

Cited by 18 publications

(5 citation statements)

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“…Khanjari et al [41] observed that increase in inlet fluid velocity (from 0.05 m/s to 0.23 m/s) increase the first law (energy) efficiency but decreases the second law (exergy) efficiency (from 15.40% to 12.50% for silver). Lelea et al [14] observed lower maximum module temperature for nanofluid based cooling as compared to water cooling at lower Re number. Whereas, at higher Re (Re > 1000) the maximum module temperature overlaps for nanofluid based cooling and water-based cooling of PV module.…”

Section: Flowratementioning

confidence: 98%

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Application of Nanofluids for Thermal Management of Photovoltaic Modules: A Review

Ali¹,

Shah²,

Babar³

et al. 2018

Microfluidics and Nanofluidics

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Mounting temperature impedes the conversion efficiency of photovoltaic systems. Studies have shown drastic efficiency escalation of PV modules, if cooled by nanofluids. Ability of nanofluids to supplement the efficiency improvement of PV cells has sought attention of researchers. This chapter presents the magnitude of improved efficiency found by different researchers due to the cooling via nanofluids. The effect of factors (such as, nanoparticle size, nanofluid concentration, flowrate of nanofluid and geometry of channel containing nanofluid) influencing the efficiency of PV systems has been discussed. Collective results of different researchers indicate that the efficiency of the PV/T systems (using nanofluids as coolant) increases with increasing flowrate. Efficiency of these systems increases with increasing concentration of nanofluid up to a certain amount, but as the concentration gets above this certain value, the efficiency tends to decline due to agglomeration/clustering of nanoparticles. Pertaining to the most recent studies, stability of nanoparticles is still the major unresolved issue, hindering the commercial scale application of nanofluids for the cooling of PV panels. Eventually, the environmental and economic advantages of these systems are presented.

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Section: Flowratementioning

confidence: 98%

“…The researches show that a PV/T system performs way better than conventional PV systems [12,13]. Lelea et al [14] investigated the effect of cooling via Al 2 O 3 on the performance of concentrated PV/T system. The results showed a decrement in the temperature of module, when cooled by nanofluid and water.…”

Section: Introductionmentioning

confidence: 99%

Application of Nanofluids for Thermal Management of Photovoltaic Modules: A Review

Ali¹,

Shah²,

Babar³

et al. 2018

Microfluidics and Nanofluidics

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show abstract

“…Lelea et al 160 performed a numerical simulation to view the cooling of small photovoltaic channels which are similar to the PV/T system with the use of the laminar flow of a nano‐Al 2 O 3 /water nanofluid. The use of nanofluids caused the temperature of the PV units compared to the water when rotated with a low Reynolds number.…”

Section: Application Of Fluids In Pv/tmentioning

confidence: 99%

A review of photovoltaic thermal systems: Achievements and applications

et al. 2020

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Summary The use of photovoltaics has spread widely, and government agencies have begun adopting plans to deploy plants with large capacities, due to their environmental friendliness, low manufacturing costs, and high productivity. In the sunny countries where this technology should spread, the photovoltaics' energy conversion efficiency decreases due to the high temperature of which the cell's operate at; because a large part of the solar radiation is absorbed by the solar panels as heat, while the smaller part converts it to electricity. From here, the benefit of the shift towards the PV/T technology that works to reduce the photovoltaic modules temperature and improve their electricity produced along with yielded thermal energy which can be utilized in other applications. In this study, a thorough review of many recent research and studies published in the field of PV/T has been carried out. The present study was divided into several sections to clarify and focus on the effect of each technology separately. Researchers used one or more fluids to cool the solar panels, and their research dealt with many of these fluids, starting with air, water, oil, etc. Other researchers have tended to increase the thermal conductivity of liquid cooling fluids by adding many types of nanoparticles with high thermal conductivity. Other researchers have used variable‐phase materials to take advantage of the large storage of the latent heat of these materials. Other researchers have studied improving heat transfer of PCMs by mixing it with nanomaterials with high thermal conductivity. Others have also combined nano‐PCMs and nanofluids together in one system, and they have demonstrated, in theory and practice, that this technique exhibits higher energy collection and utilization than the other types of PV/T. At the conclusion of the study, some critical points are identified that work is still limited and needs more research efforts and studies.

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“…Lelea et al [54] introduced a numerical study by using ANSYS-Fluent on cooling CPVT microchannel by using AL 2 O 3 /water at different nanoparticle diameters 28 nm…”

Section: Applications Of Nanotechnology In Cpvt Systemsmentioning

confidence: 99%

Use of Nanofluids in Solar PV/Thermal Systems

Ahmed

Baig

2019

International Journal of Photoenergy

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The continuous growth in the energy demand across the globe due to the booming population, in addition to the harmful effects of the fossil fuels on the environment, has made it essential to harness renewable energy via different technologies and convert it to electricity. The potential of solar energy still remains untapped although it has several advantages particularly that it is a clean source to generate both electricity and heat. Concentrating sunlight is an effective way to generate higher throughput per unit area of the absorber material used. The heat extraction mechanisms and the fluids used in solar thermal systems are key towards unlocking higher efficiencies of solar thermal systems. Nanofluids can play a crucial role in the development of these technologies. This review is aimed at presenting the recent studies dealing with cooling the photovoltaic thermal (PVT), concentrated photovoltaic thermal (CPVT), and other solar systems using nanofluids. In addition, the article considers the definition of nanofluids, nanoparticle types, nanofluid preparation methods, and thermophysical properties of the most common nanoparticles and base fluids. Moreover, the major factors which affect the nanofluid’s thermal conductivity according to the literature will be reviewed.

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The hybrid nanofluid/microchannel cooling solution for concentrated photovoltaic cells

Cited by 18 publications

References 0 publications

Application of Nanofluids for Thermal Management of Photovoltaic Modules: A Review

Application of Nanofluids for Thermal Management of Photovoltaic Modules: A Review

A review of photovoltaic thermal systems: Achievements and applications

Use of Nanofluids in Solar PV/Thermal Systems

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