Energy and exergy comparison of a flat-plate solar collector using water, Al2O3 nanofluid, and CuO nanofluid

Tong, Yijie; Lee, Hoseong; Kang, Woobin; Cho, Honghyun

doi:10.1016/j.applthermaleng.2019.113959

Cited by 187 publications

(52 citation statements)

References 41 publications

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“…The entropy generation reduction in the volume fraction of 0.01% can be related to the uniform temperature distribution in the collector, which reduces the temperature gradient in this volume fraction. A decreasing‐increasing trend in entropy generation variations is also recently reported by Tong et al who experimentally analyzed the entropy generation of CuO nanofluid flow in a FPSC. By varying the volume fraction from 0.01% to 0.1%, the solar energy absorption in the nanofluid increases, resulting in an increase in entropy generation due to heat transfer irreversibility.…”

Section: Resultssupporting

confidence: 75%

Performance enhancement of a direct absorption solar collector using copper oxide porous foam and nanofluid

Esmaeili

Karami

Delfani³

2020

Int J Energy Res

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The current research proposes the idea of using water-saturated metal oxide foams and water-based nanofluids as solar absorber in the direct absorption solar collectors (DASCs). Specifically, the novel solar collector design utilizes copper oxide (CuO) porous foam and nanoparticle with high optical properties and is expected to have enhanced thermal performance than the conventional collectors utilizing pure water. The finite volume technique is used to solve the governing equations of flow and heat transfer in the radiative participating media. Also, to establish the reliability and accuracy of numerical solutions, the obtained results are compared with the corresponding numerical and experimental data. The computations are carried out for different nanoparticle volume fractions, foam pore sizes, working fluid mass flow rates, and both porous layer thicknesses and positions (inserted at the lower or upper wall of the collector). It is found that the efficiency of DASC partially/fully filled with metal oxide foam is maximized when the collector is completely filled with it. Compared with the water flow, the numerical results show that the collector efficiency using CuO nanofluid and metal oxide foam is improved by up to 26.8% and 23.8%, respectively. Moreover, considering the second law of thermodynamics, the use of CuO nanofluids in the DASC seems to be more effective than the use of CuO porous foam. K E Y W O R D Sdirect absorption solar collector, efficiency, metal oxide foam, nanofluid, second law of thermodynamics

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Section: Resultssupporting

confidence: 75%

Performance enhancement of a direct absorption solar collector using copper oxide porous foam and nanofluid

Esmaeili

Karami

Delfani³

2020

Int J Energy Res

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“…Tong et al [ 82 ] studied the performance of a PV/T system when the different concentration Al 2 O 3 nanofluids are utilized as the working fluid, and found that when the concentrations of the Al 2 O 3 nanofluid are 1.5 vol %, 1.0 vol % and 0.5 vol %, the system efficiencies could attain up to 76.1%, 77.5% and 73.8%, respectively, and these are enhanced remarkably in comparison with that using water with 63.6% as given in Fig. 70 .…”

Section: Pv/t With Nanofluidmentioning

confidence: 99%

Comprehensive review of the recent advances in PV/T system with loop-pipe configuration and nanofluid

Cui

Zhu

Zoras

et al. 2021

Renewable and Sustainable Energy Reviews

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Solar photovoltaic/thermal technology has been widely utilized in building service area as it generates thermal and electrical energy simultaneously. In order to improve the photovoltaic/thermal system performance, nanofluids are employed as the thermal fluid owing to its high thermal conductivity. This paper summarizes the state-of-the-art of the photovoltaic/thermal systems with different loop-pipe configurations (including heat pipe, vacuum tube, roll-bond, heat exchanger, micro-channel, U-tube, triangular tube and heat mat) and nanoparticles (including Copper-oxide, Aluminium-oxide, Silicon carbide, Tribute, Magnesium-oxide, Cerium-oxide, Tungsten-oxide, Titanium-oxide, Zirconia-oxide, Graphene and Carbon). The influences of the critical parameters like nanoparticle optical and thermal properties, volume fraction, mass flux and mass flow rates, on the photovoltaic/thermal system performance are for the optimum energy efficiency. Furthermore, the structure and manufacturing of solar cells, micro-thermometry analysis of solar cells and recycling process of photovoltaic panels are explored. At the end, the standpoints, recommendations and potential future development on the solar photovoltaic/thermal system with various configurations and nanofluids are deliberated to overcome the barriers and challenges for the practical application. This study demonstrates that the advanced photovoltaic/thermal configuration could improve the system energy efficiency approximately 15%–30% in comparison with the conventional type whereas the nanofluid is able to boost the efficiency around 10%–20% compared to that with traditional working fluid.

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“…Based on the obtained results, the author suggests that future research studies should include ANN for modelling other parameters of the solar collectors, or even the complete solar system. Tong et al [35] discovered that the use of Al 2 O 3 nanofluids could improve the thermal efficiency of flat-plate solar collectors by at least 20%, compared to water.…”

Section: Solar Thermal Systemsmentioning

confidence: 99%

Solar Photovoltaic Tracking Systems for Electricity Generation: A Review

et al. 2020

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This paper presents a thorough review of state-of-the-art research and literature in the field of photovoltaic tracking systems for the production of electrical energy. A review of the literature is performed mainly for the field of solar photovoltaic tracking systems, which gives this paper the necessary foundation. Solar systems can be roughly divided into three fields: the generation of thermal energy (solar collectors), the generation of electrical energy (photovoltaic systems), and the generation of electrical energy/thermal energy (hybrid systems). The development of photovoltaic systems began in the mid-19th century, followed shortly by research in the field of tracking systems. With the development of tracking systems, different types of tracking systems, drives, designs, and tracking strategies were also defined. This paper presents a comprehensive overview of photovoltaic tracking systems, as well as the latest studies that have been done in recent years. The review will be supplemented with a factual presentation of the tracking systems used at the Institute of Energy Technology of the University of Maribor.

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Energy and exergy comparison of a flat-plate solar collector using water, Al2O3 nanofluid, and CuO nanofluid

Cited by 187 publications

References 41 publications

Performance enhancement of a direct absorption solar collector using copper oxide porous foam and nanofluid

Performance enhancement of a direct absorption solar collector using copper oxide porous foam and nanofluid

Comprehensive review of the recent advances in PV/T system with loop-pipe configuration and nanofluid

Solar Photovoltaic Tracking Systems for Electricity Generation: A Review

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