Impact of hybrid roughness geometry on heat transfer augmentation in solar air heater: A review

Chaurasia, Shuchi; Goel, Varun; Debbarma, Ajoy

doi:10.1016/j.solener.2023.02.052

Cited by 22 publications

(3 citation statements)

References 107 publications

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“…ðFor non À benef icial attributesÞ (18) Here; t ij 's are the elements of the structured decision matrix corresponding to the (i × j) th cell. The AHP-assigned criteria weights are now utilized to achieve the corresponding weighted normalized decision matrix elements using equation ( 19)…”

Section: Weighted Aggregated Sum Product Assessment Techniquementioning

confidence: 99%

“…[13][14][15][16] Various types of roughness geometries were used but very less work has been carried out on the compound type of roughness. [17][18][19] Here compound means a combination of more than one type of roughness element used in a SAH. Jaurker et al 20 experimentally investigated the heat transfer and friction characteristics of rib-grooved artificial roughness on a plate (absorber).…”

Section: Introductionmentioning

confidence: 99%

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Parametric optimization of hybrid artificial roughness used in solar air heaters using multiple criteria decision making techniques

Goel

Dwivedi

Choudhary

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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Solar air heaters (SAHs) are widely accepted and used for drying and heating purposes. Numerous methodologies are available for augmentation of the performance of a SAH but the application of artificial roughness underside the absorber plate is reported to bean efficient one. This study aims to present the effects of using hybrid artificial roughness combining the transverse ribs along with discrete inclined ribs, on the thermo-hydraulic performance of roughened SAH. The response surface methodology (RSM) is utilized for the design of experiments to investigate the influence of relative roughness height (0.018 ≤ e/ D ≤ 0.036), relative roughness pitch (5 ≤ p/ e ≤ 15), attack angle (45° ≤ α ≤ 75°), and Reynolds number (1,900 ≤ Re ≤ 20,300) as input parameters. The empirical equations are developed for Nusselt number, friction factor, and thermo-hydraulic performance parameter based on the regression analysis. An integrated analytical hierarchy process-based weighted aggregated sum product assessment (AHP-WASPAS) method is used to evaluate an optimal parametric combination ( e/ D = 0.036, p/ e = 15, α = 75°, and Re = 20,300). The results are supported by the corresponding experimental outcomes. Also, the sensitivity analysis and rank reversal tests performed as qualitative assessment procedures for the results obtained from the proposed strategy. The proposed decision framework is reported to be very sensitive to several criteria weight fluctuations with maximum and least deviations of 15.41% and 2.56% for δWjp = +50% and δWjp = −10%, respectively. Further, the obtained results confirm the robustness of aopted decisional scheme with just one rank reversal.

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Section: Weighted Aggregated Sum Product Assessment Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parametric optimization of hybrid artificial roughness used in solar air heaters using multiple criteria decision making techniques

Goel

Dwivedi

Choudhary

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…Numerous review articles have been published in this field of heat transfer enhancement using single and hybrid types of artificial roughness in the SAH duct. [1][2][3][4] A variety of artificial roughness have been employed in existing literature such as fins, [5][6][7][8][9][10][11][12] baffles, [13][14][15] and turbulators [16][17][18] for cooling purpose of the heated surface of the heat exchanging system. Different types of air passes like single pass, double pass, and multipass SAHs are employed to augment the overall performance of SAHs.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Reverse Flow Solar Air Heater Having Perforation and Delta Wing on Absorber Plate

Sharma,

Debbarma

2024

Energy Tech

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fThe traditional solar air heater (SAH) has poor thermal performance due to low heat transfer coefficient. Artificial roughness, flow passage alteration, absorber modification, etc. can enhance it. Thus, an experimental investigation is performed to study the thermohydraulic characteristics of a reverse flow SAH with perforated absorber and delta wing (DW) structure. The present study investigates the effect of attack angle (15°–75°) at constant streamwise pitch (35 mm), transverse pitch (70 mm), height (h), and width (w) of DW 20 mm, under Reynolds number (Re) ranging from 4000 to 20 000. The perforation index (PI = ADW/Aap) for inline and staggered arrangements are 9.52 and 4.76, respectively. The results indicate that the concept of perforated absorber and DW leads to enhanced heat transfer, reduced pressure drops, and enhanced utilization of solar energy. The Nusselt number (Nu), friction factor (f), and thermohydraulic performance enhance about 6.6, 9.4, and 3.06 times, respectively, at attack angle 75o for inline arrangement of DW over the smooth duct. Thermohydraulic performance of reversed‐flow SAH is compared with previously published works, and it highlights that the full‐length inline and staggered arrangement of the DW offers the most significant improvements in heat transfer and friction factor.

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An Experimental and Computational Investigation on Fluid Flow and Thermal Performance of a Rhombus Passage Solar Air Heater of Various Configurations

Dara,

Muvvala

2023

Arab J Sci Eng

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Impact of hybrid roughness geometry on heat transfer augmentation in solar air heater: A review

Cited by 22 publications

References 107 publications

Parametric optimization of hybrid artificial roughness used in solar air heaters using multiple criteria decision making techniques

Parametric optimization of hybrid artificial roughness used in solar air heaters using multiple criteria decision making techniques

Experimental Study of Reverse Flow Solar Air Heater Having Perforation and Delta Wing on Absorber Plate

An Experimental and Computational Investigation on Fluid Flow and Thermal Performance of a Rhombus Passage Solar Air Heater of Various Configurations

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