Numerical investigation of efficiency enhancement in a direct absorption parabolic trough collector occupied by a porous medium and saturated by a nanofluid

Tayebi, Rashid; Akbarzadeh, Sanaz; Valipour, Mohammad Sadegh

doi:10.1002/ep.13010

Cited by 37 publications

(8 citation statements)

References 48 publications

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“…By solving Equations ( 33) and (34), equating based on some exponents of q and after some simplifications, we obtain the following 0th order and 1st order equations:…”

Section: Solutions and Resultsmentioning

confidence: 99%

“…Ref. [34] conducted a numerical investigation of the solar parabolic trough collector with an area of 0.856 m 2 by combination of Monte Carlo Ray-Trace (MCRT) and finite volume method (FVM) using the FLUENT software. M. Sheikholeslami et al [35] reviewed empirical and numerical analyses of thermal performance development in flat plate solar collectors (FPSCs) based on the up-to-date developments, methods, critical economic factors, the significance of solar water heating, and the challenges faced by the implementations of such solar water heating systems, which could be beneficial for all stakeholders of solar energy.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Heat Transfer on Unsteady Hiemenz Cu-Water and Ag-Water Nanofluid Flow over a Porous Wedge Due to Solar Radiation

et al. 2021

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Nanoparticles are generally used to scatter and absorb solar radiations in nanofluid-based direct solar receivers to efficiently transport and store the heat. However, solar energy absorption in nanofluid can be enhanced by using differential materials and tuning nanofluid parameter. In this regard, theoretical investigations of unsteady homogeneous Hiemenz flow of an incompressible nanofluid having copper and silver nanoparticles over a porous wedge is carried out by using optimal homotopy asymptotic method (OHAM). Hence, a semi-analytical solver is applied to the transformed system to study the significance of magnetic field along with Prandtl number. In this work, impacts of conductive radiations, heat sink/source, unsteadiness, and flow parameters have been investigated for velocity and temperature profiles of copper and silver nanoparticles-based nanofluid. The effects of magnetic strength, volume fraction of nanoparticles, thermal conductivity, and flow parameters have also been studied on the considered nanofluids.

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“…By solving Equations ( 33) and (34), equating based on some exponents of q and after some simplifications, we obtain the following 0th order and 1st order equations:…”

Section: Solutions and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Heat Transfer on Unsteady Hiemenz Cu-Water and Ag-Water Nanofluid Flow over a Porous Wedge Due to Solar Radiation

et al. 2021

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“…In another recent attempt, Bårdsgård 28 Bozorg et al 30 and Tayebi et al 31 simulated a novel parabolic trough solar collector having an annular porous layer inside the absorber tube. Meanwhile, Yegane and Kasaeian 32 simulated a flat plate solar collector filled with a hybrid nanfluid-saturated porous medium in the presence of an externally applied magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Porous foams and nanofluids for thermal performance improvement of a direct absorption solar collector: An experimental study

Hooshmand

Zahmatkesh

Karami

et al. 2021

Env Prog and Sustain Energy

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In this study, attention is focused to examine experimentally how utilization of porous foams, as well as nanofluids, may improve thermal performance of a residential-type direct absorption solar collector (DASC). The experiments are undertaken for SiC ceramic as the porous foam and SiC-water suspension as the nanofluid.Three levels are chosen for the reduced temperature difference, the porous foam, and the volumetric flowrate while four levels are selected for the nanoparticle concentration. To determine the relative importance of each of the involved parameters on thermal efficiency of the DASC, an ANOVA is undertaken. The best thermal performance is achieved in a case having both the metal foam and the nanoparticles.The maximum rises in thermal efficiency due to the insertion of the porous foam and the inclusion of the nanoparticles are recorded to be 14% and 37%, respectively. However, it is found that the volumetric flowrate is the dominant parameter in this system in a way that the inclusion of the porous foam or the nanoparticles deteriorates its role. Comparison of the results of the two porous foams demonstrates that the foam having higher porosity and pore density leads to higher thermal efficiency.

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“…It should be noted that in most of them, air and ceramic foams are used as the HTF and porous media, respectively. Few studies have considered the volumetric receiver occupied by a liquid saturated metal foam . Recently, Valizade et al investigated the application of copper metal foam in a direct absorption PTC at different mass flow rates, inlet temperatures, and porous insert configurations.…”

Section: Introductionmentioning

confidence: 99%

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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Numerical investigation of efficiency enhancement in a direct absorption parabolic trough collector occupied by a porous medium and saturated by a nanofluid

Cited by 37 publications

References 48 publications

Numerical Investigation of Heat Transfer on Unsteady Hiemenz Cu-Water and Ag-Water Nanofluid Flow over a Porous Wedge Due to Solar Radiation

Numerical Investigation of Heat Transfer on Unsteady Hiemenz Cu-Water and Ag-Water Nanofluid Flow over a Porous Wedge Due to Solar Radiation

Porous foams and nanofluids for thermal performance improvement of a direct absorption solar collector: An experimental study

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

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