Parametric investigation of thermal characteristic in trapezoidal cavity receiver for a linear Fresnel solar collector concentrator

Dabiri, Soroush; Khodabandeh, Erfan; Poorfar, Alireza Khoeini; Mashayekhi, Ramin; Toghraie, Davood; Zade, Seyed Ali Abadian

doi:10.1016/j.energy.2018.04.025

Cited by 111 publications

(17 citation statements)

References 45 publications

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“…In the second scenario, the focus is on the heating coil. Many studies showed the effectiveness of using solar energy (Ahmadi et al, 2017a;Ahmadi et al, 2017b;Ahmadi et al, 2018;Dabiri et al, 2018;Gholipour et al, 2020). In the heating coil, the temperature rises during a process in which the humidity ratio remains constant.…”

Section: Second Scenariomentioning

confidence: 99%

Transient Thermal Analysis of a Solar-Assisted AHU by Focusing on Heat Recovery and Nanoparticles: Jeddah Climate Zone

Khetib

2021

Front. Energy Res.

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In the Jeddah climate region, a lot of energy is assigned to the air handling unit (AHU) sector, which should be reduced by using energy-efficient solutions. As the air passes through the cooling coil, a lot of energy is consumed to reduce the temperature along with humidity so that if the air is precooled in the previous stages, energy consumption in this energy-intensive section will be diminished. Using the coldness of the return air in the heat recovery unit (HRU), the incoming air is precooled. Based on the thermodynamic calculations, in June, July, and August, the cooling coil power demand reduces by 11.6, 13.3, and 12%, respectively. In summer, owing to using HRU, an energy-saving by 76.08 MWh is achieved (12.34% reduction in energy demand). By the incorporation of the solar collectors in the AHU, heating coil demand diminishes by 1,206, 1,399, and 1,367 kWh in June, July, and August, respectively. To improve the solar-assisted AHU effectiveness, the MWCNT nanoparticles are injected into the collectors, and it is found that the saving-energy capability improves by 17.7% using MWCNT-water at 0.1 vol.%.

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Section: Second Scenariomentioning

confidence: 99%

Transient Thermal Analysis of a Solar-Assisted AHU by Focusing on Heat Recovery and Nanoparticles: Jeddah Climate Zone

Khetib

2021

Front. Energy Res.

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“…In a similar study, Ahmadi et al conducted energy, exergy, and environment analysis on the CHP system, known as 3E [15]. Dabiri et al calculated a parametric analysis of the thermal characteristics in a special receiver for a special 3-collector concentrator [16]. Jozaalizadeh et al used MILD (moderate or intense low oxygen dilution) technology in their study to increase thermal efficiency [17].…”

Section: Introductionmentioning

confidence: 99%

Comparison of effects of nanofluid utilization (Al2O3, SiO2, TiO2) with reference water in automotive radiators on exergetic properties of diesel engines

2021

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In this study, nanofluids formed by using ethylene glycol and three kinds of nanoparticles such as Al2O3, SiO2, and TiO2 were added to the four-stroke internal combustion engine radiator and compared with the conventional coolant (pure water). This comparison is based on the exergy performances which are the main theme of the second law of thermodynamics. The tests were carried out at a fixed engine speed of 1800 rpm using diesel fuel, and the outputs were obtained from the test setup experimentally. A total of six nanofluid tests were performed on two different dispersions (0.2% and 0.4%). As a result of this study, the best exergy efficiency was obtained by using TiO2 particles with a 35.67% value. Increasing the percentage of nanoparticles in the fluid from 0.2 to 0.4 positively affected efficiency. Pure water generally lagged behind nanofluid performance in experimental parameters. Compared to conventional coolant (pure water), the lowest exhaust temperature value was measured by using an Al2O3/Ethylene Glycol mixture with a difference of 59 K. Also, by using Al2O3 nanoparticles as a coolant, 8.858 kW of exergy exhaust value was obtained. This is the best emission value measured in the experimental study. While calculating values close to each other in the use of other nanoparticles, the worst exergy exhaust results were obtained by using the conventional refrigerant. Consequently, in this paper, exergetic outputs such as exergetic efficiency, exergy destruction, exergy heat, exergy work, exergy total exhaust, and entropy production rate were calculated for pure water and each nanofluid.

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“…27 They optimized the effective properties of the solar system such as dimensional and optical ones for attaining the best performance. Dabiri et al 28 considered a linear Fresnel reflector with a linear trapezoidal-shape cavity through a numerical investigation. The thermal operation of the solar unit was investigated including heat transfer and heat losses.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of a parabolic trough concentrator with linear V‐shape cavity

Rafiei

Loni

Ahmadi

et al. 2020

Energy Science & Engineering

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Parametric investigation of thermal characteristic in trapezoidal cavity receiver for a linear Fresnel solar collector concentrator

Cited by 111 publications

References 45 publications

Transient Thermal Analysis of a Solar-Assisted AHU by Focusing on Heat Recovery and Nanoparticles: Jeddah Climate Zone

Transient Thermal Analysis of a Solar-Assisted AHU by Focusing on Heat Recovery and Nanoparticles: Jeddah Climate Zone

Comparison of effects of nanofluid utilization (Al2O3, SiO2, TiO2) with reference water in automotive radiators on exergetic properties of diesel engines

Sensitivity analysis of a parabolic trough concentrator with linear V‐shape cavity

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