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Keywords: absorber
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Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. August 2023, 145(4): 041010.
Paper No: SOL-22-1032
Published Online: January 27, 2023
... systems offer a promising pathway to successfully utilize the high-temperature heat (>700 °C) [ 7 ] absorbed from a solar thermal receiver to drive a supercritical carbon dioxide (s-CO 2 ) Brayton power cycle by providing operating temperatures beyond 700 °C [ 8 ], which can yield ≥50% thermal...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. August 2023, 145(4): 041004.
Paper No: SOL-22-1277
Published Online: December 26, 2022
...Faisal Altwijri; S. A. Sherif; Ahmed M. Alshwairekh This paper reports on a parametric investigation of the thermal enhancement of a double-reflector parabolic trough collector when employing an in-line mixed V-shape (IMVS) ribbed absorber tube. Three heat transfer fluids (HTFs) are investigated...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. April 2023, 145(2): 021013.
Paper No: SOL-22-1167
Published Online: September 30, 2022
...Dheeraj Kumar; Apurba Layek An effort is made to study the performance of a solar air heater having the absorber surface roughened by providing staggered, twisted, and V-shaped ribs roughness. The liquid crystal thermography technique is applied to get the Nu distribution over the surface...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. April 2023, 145(2): 021004.
Paper No: SOL-21-1166
Published Online: August 18, 2022
... model temperature evacuated solar exergy series absorber clean energy collector efficiency radiation thermodynamics Evacuated tube solar collectors (ETCs) are concentric tubes with vacuum between them to remove the medium for convective and conductive losses [ 1 , 2 ]. Based...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. October 2022, 144(5): 051009.
Paper No: SOL-21-1169
Published Online: May 10, 2022
... is kept constant. The channel design that gives the best performance was further investigated by incorporating a sinusoidal wavy absorber having variable wavy roughness parameters. The flow and heat transfer characteristics have been evaluated in terms of friction factor (f) and Nusselt number per unit...
Journal Articles
Article Type: Design Innovation Paper
J. Sol. Energy Eng. October 2022, 144(5): 055001.
Paper No: SOL-21-1304
Published Online: March 22, 2022
... with little spillage at all sun elevations. With an area of 10–20 times larger than the cavity entrance, the absorber functions at peak temperatures that are within range of standard stainless steel tubing, despite using a gaseous HTF. Reflectors of PWF collectors have significantly better cosine factors than...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. October 2022, 144(5): 051001.
Paper No: SOL-21-1393
Published Online: March 18, 2022
... the dehumidification effectiveness of plastic and metallic surfaces of adiabatic/nonadiabatic falling film tower by incorporating the wetting factor and sensible cooling information in the correlation equation. The new approach takes into account the sensible cooling (nonadiabatic absorber) of the desiccant solution...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. April 2022, 144(2): 021006.
Paper No: SOL-21-1165
Published Online: November 25, 2021
...Hamed Abedini; Nesrin Ozalp Carbon particles can be used as catalyst in solar reactors where they serve as radiant absorbent and nucleation sites for the heterogeneous decomposition reaction. Unlike commonly used metal catalysts, carbon catalyst does not have durability problem and high cost...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. February 2022, 144(1): 011011.
Paper No: SOL-21-1152
Published Online: October 6, 2021
... (prepared by dispersing functionalized carbon soot nanoparticles extracted from used engine oil into paraffin oil) having high solar weighted absorptivity has been employed to volumetrically absorb the incident solar energy. This additional absorbed solar energy is provided to the solar still by circulating...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. December 2021, 143(6): 061001.
Paper No: SOL-20-1320
Published Online: April 23, 2021
... of the glass and water are determined by (7) C g = ρ g L g A g c g , C w = ρ w V w c w The heat fluxes absorbed by the glass tube q g and by the evaporator of the HP q e are given by [ 21 , 23 ] (8) q g ( t ) = ρ m α g γ k a m...
Journal Articles
Article Type: Technical Briefs
J. Sol. Energy Eng. October 2021, 143(5): 054501.
Paper No: SOL-20-1323
Published Online: March 16, 2021
... influx absorbed by the absorber plate. The iron content of glass and its thickness play a significant role in enhancing thermal and optical efficiencies. The low-iron glass (LiG-12 mm) has 16.3% and 20% greater thermal efficiency than medium- (MiG-12 mm) and high-iron glass (HiG-12 mm), respectively...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. October 2021, 143(5): 051004.
Paper No: SOL-20-1387
Published Online: February 23, 2021
... data for this study are included in the paper. Data provided by a third party listed in Acknowledgment. National Institute for Space Research. α = absorbance of the material ɛ = emissivity of the body κ = thermal conductivity of the material (W/(m K)) k r...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. August 2021, 143(4): 041001.
Paper No: SOL-20-1050
Published Online: November 2, 2020
... of the stretching band ZnO, namely, the wave number, A ( ν ) is the absorbance and d the film thickness, respectively. The experimental spectra were fitted using a Lorentzian component (Fig. 2 ). A(υ) is given by (2) A ( υ ) = L ( x ) = a ⋅ c ( x − b ) 2 + c 2 where...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. June 2021, 143(3): 031011.
Paper No: SOL-20-1207
Published Online: October 27, 2020
...Roger Cundapí; Sara L. Moya; Octavio Cazarez Temperature fields and their transient behaviors are essential subjects to be considered for modeling and design of absorber tubes in concentrated solar power plants. Both subjects have been addressed by various authors. However, the first subject has...
Includes: Supplementary data
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. April 2021, 143(2): 021010.
Paper No: SOL-20-1242
Published Online: September 29, 2020
... curve coefficients, i.e., a o , a 1 , and a 2 , are shown in Table 2 as provided by the manufacturer. The collector can be assumed to be in a thermal steady-state. Then, the single-phase heat transfer rate absorbed by water is (2) Q ˙ s p = η s p ⋅ I sol ⋅ A c...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. February 2021, 143(1): 011006.
Paper No: SOL-20-1103
Published Online: July 1, 2020
... absorber clean energy collector efficiency measurement solar testing Because of the increasing greenhouse gases, environmental pollutants, and the rapid depletion of conventional energy sources, the search for alternative energy sources has been necessitated to meet the present and future...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. December 2020, 142(6): 061008.
Paper No: SOL-20-1126
Published Online: May 12, 2020
... model ray-tracing absorber optics simulation solar receiver As one of the potential solutions to the energy crisis and global warming, solar energy has been used to replace fossil fuels in various thermal systems. The critical device in solar thermal systems is the solar collector...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. October 2020, 142(5): 051011.
Paper No: SOL-19-1374
Published Online: March 26, 2020
... ˙ C p ( T o − T i ) = h × A c ( T p m − T f m ) The collector area for three-sided rugged absorber plate can be calculated using the expression below: (4) A c ( 3 r ) = ( L × W ) + 2 ( L × H ) Email...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. December 2020, 142(6): 061002.
Paper No: SOL-19-1492
Published Online: March 26, 2020
..., is designed as an inclined channel to conduct the experiments. Constant heat flux condition is provided by electrical heating on the top absorber plate of the channel. Experiments are conducted for heat flux ranging from 250 to 750 W/m 2 for the channel inclination angle of 30 deg. Porous material bed height...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. October 2020, 142(5): 051001.
Paper No: SOL-19-1426
Published Online: February 7, 2020
...Inzamam Ahmad; N. H. Khan; M. A. Hassan; M. K. Paswan Thermal transport and flow friction characteristics due to roughness on the absorber plate of solar air heater are evaluated by applying three-dimensional finite volume based code. Renormalization group (RNG) k–ɛ model is employed to capture...