Six sigma robust multi-objective design optimization of flat plate collector system under uncertain design parameters

Nejlaoui, Mohamed; Alghafis, Abdullah; Sadig, Hussain

doi:10.1016/j.energy.2021.121883

Cited by 6 publications

(3 citation statements)

References 42 publications

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“…To accurately assess these variations, it became necessary to extend the Voc-temperature relationship down to the theoretical limit of 0 K as temperature generated heat plays a big role not only in material levels but also in module levels. (AlSaleem et al, 2022;Alshammari et al, 2022;Najlaoui et al, 2023) This process involved extrapolating the observed data points to intersect the Y-axis (Voc) at this absolute zero temperature, thereby estimating the absorber material's energy gap. The rationale behind this approach lies in the assumption that, at 0K, all thermally activated recombination processes would cease, thus equating the open-circuit voltage with the material's bandgap.…”

Section: Effect Of Temperature (Activation Energy Analysis)mentioning

confidence: 99%

Assessment of photovoltaic efficacy in antimony-based cesium halide perovskite utilizing transition metal chalcogenide

Alghafis,

Sobayel

2024

Int. J. Renew. Energy Dev.

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Antimony-based perovskites have been recognized for their distinctive optoelectronic attributes, standard fabrication methodologies, reduced toxicity, and enhanced stability. The objective of this study is to systematically investigate and enhance the performance of all-inorganic solar cell architectures by integrating Cs3Sb2I9, a perovskite-analogous material, with WS2—a promising transition metal dichalcogenide—used as the electron transport layer (ETL), and Cu2O serving as the hole transport layer (HTL). This comprehensive assessment extends beyond the mere characterization of material attributes such as layer thickness, doping levels, and defect densities, to include a thorough investigation of interfacial defect effects within the structure. Optimal efficiency was observed when the Cs3Sb2I9 absorber layer thickness was maintained within the 600-700 nm range. The defect tolerance for the absorber layer was identified at 1×1015/cm3, with the ETL and HTL layers exhibiting significant defect tolerance at 1×1016/cm3 and 1×1017/cm3, respectively. Furthermore, this study calculated the minority carrier lifetime and diffusion length, establishing a strong correlation with defect density; a minority carrier lifetime of approximately 1 µs was noted for a defect density of1×1014/cm3 in the absorber layer. A noteworthy finding pertains to the balance between the high work function of the back contact and the incorporation of p-type back surface field layers, revealing that interposing a highly doped p+ layer between the Cu2O and the metal back contact can elevate the efficiency to 21.60%. This approach also provides the freedom to select metals with lower work functions, offering a cost-effective advantage for commercial-scale applications.

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Section: Effect Of Temperature (Activation Energy Analysis)mentioning

confidence: 99%

Assessment of photovoltaic efficacy in antimony-based cesium halide perovskite utilizing transition metal chalcogenide

Alghafis,

Sobayel

2024

Int. J. Renew. Energy Dev.

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“…The 45 • tilt angle of the collector will yield the 81% highest thermal performance. Nejlaoui et al [64] developed and performed the six-sigma robust multi-objective optimization (SSRMO), which takes uncertainty in the design parameters (UDP) into consideration. Three factorscost, efficiency, and UDP sensitivity-of FPCs are simultaneously taken into account by SSRMO.…”

Section: Modifications In Collector/absorber Designmentioning

confidence: 99%

Sustainable Energy Progress via Integration of Thermal Energy Storage and Other Performance Enhancement Strategies in FPCs: A Synergistic Review

Pathak,

Tazmeen,

Chopra

et al. 2023

Sustainability

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Flat plate collectors (FPCs) are the leading solar thermal technology for low-medium range temperature applications. However, their expansion in developing countries is still lacking because of their poor thermal performance. Improving the thermal performance of flat plate collectors (FPCs) is a crucial concern addressed in this review This study comprehensively discussed the performance improvement methods of FPCs, such as design modification, reflectors, working fluid, and energy storage materials, by covering current issues and future recommendations. Design factors such as coating and glass cover thickness, thickness of absorber plate and material, air gap between the glass cover and absorber plate, and riser spacing, along with insulation materials, are examined for their impact on FPC performance. Absorber design changes with selective coatings for improving the heat transmission rate between the working fluid and absorber are critical for enhancing collectors’ thermal output. The nanofluids utilization improved FPC’s thermal performance in terms of energetic and exergetic outcomes in the 20–30% range. Moreover, adding a heat storage unit extends the operating hours and thermal output fluctuations of FPCs. Research suggests that employing turbulators and nanofluids as heat transfer fluids are particularly effective for enhancing heat transfer in FPCs. This comprehensive review serves as a critical tool for evaluating and comparing various heat transfer augmentation techniques, aiding in the selection of the most suitable option.

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“…Bill Smith introduced a quality-control system known as Six Sigma in 1986 [3]. It makes use of data-driven examination to decrease errors or flaws in a business or corporate operation.…”

Section: Introductionmentioning

confidence: 99%

Performance optimization of radiator engine parameters during hard conditions by control charts monitoring and evaluating

Abduljabbar,

Oleiwi,

Sabry

2023

EEJET

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Recently, engine design and control systems have been developed using data-driven modeling techniques to specify the in-cylinder complicated combustion process. The cooling fan performance is highly influenced by several factors that are determined based on what is called (DOE) «design of experiments». These factors include blade tip clearance, pitch angle, distance from radiator. This work presents a method to improve a cooling fan performance of an engine by designing a Six Sigma technique using Control, Improve, Analyze, Measure, and Define (CIAMD). First, let’s assess the existing cooling fan performance and define its problem. Then, let’s specify the parameters that affect on fan performance to be optimized. Next, let’s conduct sensitivity analysis and evaluate manufacturing control of the developed cool Fan. The primary fan does not distribute air enough by the radiator to maintain the machine cool throughout hard circumstances. First, the work demonstrates how to develop an experiment to examine the influence of three performance elements: blade pitch angle, blade-tip clearance, and fan distance from the radiator. In order to improve the performance of the cooling fan, Box-Behnken design is adopted for testing quadratic (nonlinear) effects. It then indicates how to predict optimal quantities for every element, to produce a technique that makes airflows above the objective of 1486.6 m3/h when utilizing experimental measurements. Finally, it reveals how to operate simulations to confirm that this method creates airflow based on the specifications with more additional fans manufactured performance of 99.999 %. The results of S and X-bar control charts indicate that the manufacturing process is statistically under control

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Six sigma robust multi-objective design optimization of flat plate collector system under uncertain design parameters

Cited by 6 publications

References 42 publications

Assessment of photovoltaic efficacy in antimony-based cesium halide perovskite utilizing transition metal chalcogenide

Assessment of photovoltaic efficacy in antimony-based cesium halide perovskite utilizing transition metal chalcogenide

Sustainable Energy Progress via Integration of Thermal Energy Storage and Other Performance Enhancement Strategies in FPCs: A Synergistic Review

Performance optimization of radiator engine parameters during hard conditions by control charts monitoring and evaluating

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