Concentrated solar tower hybrid evacuated tube–photovoltaic/thermal receiver with a non-imaging optic reflector: A case study

Khlief, Ayad K.; Gilani, Syed I.U.; Al-Kayiem, Hussain H.; Mohammad, Sanan T.

doi:10.1016/j.jclepro.2021.126683

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…Solar energy is an abundant, environment-friendly, and hygienic energy source, so it is employed to meet the enormous demands of the power and energy sectors [1][2][3]. The easiest and most effective approach to satisfy such demands is to use sunray energy as a heating source.…”

Section: Introductionmentioning

confidence: 99%

Parabolic Air Collectors with an Evacuated Tube Containing Copper Tube and Spiral Strip, and a New Cavity Receiver: Experimental Performance Analysis

et al. 2023

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Sunray thermal energy is one of the most promising and quickly growing techniques globally. In parabolic trough air collectors (PTAC), receiver design and safety are of paramount importance because of their impact on the overall effectiveness of power plants. However, experimental studies of alternative receivers to improve heat transfer are still to be performed. In this study, a PTAC system was tested experimentally with an evacuated tube: open on one end, containing a copper tube and a spiral strip (case 1), and with a new cavity receiver consisting of several arranged tetragonal pyramidal elements (case 2). Afterward, the results were compared and showed a slightly superior exit air temperature and thermal efficiency performance for case 1. The overall results demonstrate a remarkable convergence of case 2 from case 1 in terms of temperature increase across PTAC, in which the maximum exit air temperature for case 1 is 58.2 °C, a 3.4% increase over case 2 at 0.0105 kg/s mass flow rate. Lastly, the results validate the potential and clarify the specific conclusions of these methods’ application in improving heat exchange in a PTAC.

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Section: Introductionmentioning

confidence: 99%

Parabolic Air Collectors with an Evacuated Tube Containing Copper Tube and Spiral Strip, and a New Cavity Receiver: Experimental Performance Analysis

et al. 2023

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“…Indeed, the dual fluids operation mode reduced the solar cells temperature and hence increased the electrical output. However, those systems are linked with high costs and reduced performance in areas with high proportion of diffuse solar irradiance (Khlief et al, 2021). In the flat-plate layout, the performance of PV-T systems has been estimated by different numerical models using steady-state (Sahlaoui et al, 2021;Salameh et al, 2021) or transient conditions (Maleki et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Modeling of Energy and Exergy Efficiencies in High Vacuum Flat Plate Photovoltaic Thermal (PV-T) Collectors

Luca¹,

Caldarelli²,

Gaudino³

et al. 2022

Preprint

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This work deals with the performance evaluation of novel flat photovoltaic-thermal (PV-T) modules under vacuum. Through a 1D (dimensional) steady-state-energy-balance numerical model developed in MATLAB, two different layouts are studied: the first consisting of a photovoltaic (PV) cell installed just below the glass encapsulating the flat panel, and the second where the PV cell is placed on the selective solar absorber (SSA). In both cases the thermal and electrical efficiencies have been evaluated at different SSA operating temperatures, in the range of 323 K to 423 K. The analysis has been conducted at different energy bandgap (Ebg) of the PV cell and assuming a variable transmittance or emittance of the PV cell, depending on the design. The two systems efficiency comparison has been carried out at the same operating temperature. Overall, this work highlights the importance of high vacuum insulation, which guarantees the reduction of convective thermal losses, and shows that the maximum energy is produced for PV cells with Ebg ≈1.5-1.7 eV, depending on layout and operating temperature, by including the thermal output in the PV-T optimization. The energy and exergy efficiencies obtainable using the proposed PV-T systems are considerably improved compared to the results previously reported in the literature.

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Perspectives and review of photovoltaic-thermal panels in net-zero energy buildings

Arabkoohsar

Xie

Wei

et al. 2022

J Therm Anal Calorim

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Concentrated solar tower hybrid evacuated tube–photovoltaic/thermal receiver with a non-imaging optic reflector: A case study

Cited by 8 publications

References 17 publications

Parabolic Air Collectors with an Evacuated Tube Containing Copper Tube and Spiral Strip, and a New Cavity Receiver: Experimental Performance Analysis

Parabolic Air Collectors with an Evacuated Tube Containing Copper Tube and Spiral Strip, and a New Cavity Receiver: Experimental Performance Analysis

Modeling of Energy and Exergy Efficiencies in High Vacuum Flat Plate Photovoltaic Thermal (PV-T) Collectors

Perspectives and review of photovoltaic-thermal panels in net-zero energy buildings

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