Evaluation of thermal efficiency of double-pass solar collector with porous–nonporous media

Sopian, Kamaruzzaman; Alghoul, M. A.; Alfegi, Ebrahim M. Ali; Sulaiman, Muhammad Azwadi; Musa, Elradi A.

doi:10.1016/j.renene.2008.05.027

Cited by 173 publications

(88 citation statements)

References 17 publications

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“…However the presence of a porous medium has been shown to have a positive influence in the design of solar energy absorbers [20]. Generally for low velocity transport in porous systems the Darcian model [21] is implemented. Such a model is only valid when the Reynolds number based on the pore size is less than unity i.e.…”

Section: Introductionmentioning

confidence: 99%

Computational modeling of heat transfer in an annular porous medium solar energy absorber with the P1-radiative differential approximation

Bég

Ali

Zaman

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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SummaryWe study the (R) and axial (X) direction. A numerical finite difference (FTCS) scheme is used to compute the velocity (U,V), temperature () and dimensionless zero moment of intensity (I0) distributions for the effects of conduction-radiation parameter (N), Darcy parameter (Da), Forchheimer parameter (Fs), Rayleigh buoyancy number (Ra), aspect ratio (A) and Prandtl number (Pr). The computations have shown that increasing aspect ratio increases both axial and radial velocities and elevates the radiative moment of intensity. Increasing Darcy number accelerates both axial and radial flow whereas increasing

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Section: Introductionmentioning

confidence: 99%

Computational modeling of heat transfer in an annular porous medium solar energy absorber with the P1-radiative differential approximation

Bég

Ali

Zaman

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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“…Many researchers [9][10][11] have investigated theoretically the different collector designs by applying the heat balance equations in order to compute the temperature distribution in each of their components. In the calculations, the heat transfer coefficients, which are assumed constant over the flow channels, were determined from the correlation developed by Kays [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Analysis on Thermal Performance of the Flat Plate Solar Air Collector

Aissaoui¹,

Benmachiche²,

Brima³

et al. 2016

IJHT

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Experimental and Theoretical investigation is presented to simulate the heat transfer in flat-plate single pass solar air collector working in forced convection. The complexity of the mathematical models of these phenomena has led researchers to conduct studies related to this field based on several simplifying assumptions, such as, the convective heat transfer coefficient is considered as constant. In this research work, initially, an experimental study is performed using thermocouples to measure temperature distributions on solar air heater components. The different measured temperatures of the absorber plate, air flow and bottom plate are used to determine the local convective heat transfer coefficients. Secondly, the problem is treated numerically by a developed FORTRAN code to calculate, for different solar radiation intensity, the temperature variations in each solar air panel components. Satisfactory qualitative and quantitative agreement is obtained between the numerical and experimental results.

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“…In addition to the effects of forced convection [6] and free convection [7,8], a considerable improvement on collector performance is achievable by increasing the heat-transfer area and creating air turbulence inside the flow ducts by using extended heat-transfer areas [9], air turbulence [10] and packing materials [11,12]. The higher convective heat-transfer coefficient and higher thermal energy efficiency are achieved in the solar collector of the present recycling device as the wire mesh is inserted in the lower channel under the absorber plate.…”

Section: Introductionmentioning

confidence: 99%

Recycle Effect on Device Performance of Wire Mesh Packed Double-Pass Solar Air Heaters

Lin

Yang

et al. 2014

Energies

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Abstract:A new device for inserting an absorber plate to divide a flat-plate channel into two subchannels to conduct double-pass wire mesh packed operations was developed. The proposed wire mesh packed device improves the heat transfer efficiency substantially as compared that to flat-plate single-pass and double-pass operations using the same working dimensions, and the improvement of device performance was investigated experimentally and theoretically. Good agreement between the theoretical prediction and the measured values from the experimental results was achieved. Considerable heat transfer improvement was obtained employing wire mesh packed double-pass operations under the absorber plate with external recycle. The influences of recycle ratio on the heat transfer efficiency and the power consumption increase were also discussed.

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Evaluation of thermal efficiency of double-pass solar collector with porous–nonporous media

Cited by 173 publications

References 17 publications

Computational modeling of heat transfer in an annular porous medium solar energy absorber with the P1-radiative differential approximation

Computational modeling of heat transfer in an annular porous medium solar energy absorber with the P1-radiative differential approximation

Experimental and Theoretical Analysis on Thermal Performance of the Flat Plate Solar Air Collector

Recycle Effect on Device Performance of Wire Mesh Packed Double-Pass Solar Air Heaters

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