A review on artificial roughened solar air heaters with and without thermal energy storage

Hedau, Ankush; Saini, R.P.

doi:10.1080/15435075.2023.2194387

Cited by 3 publications

(4 citation statements)

References 169 publications

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“…As per previous literature review, it was found that the arc-shaped ribs had better THP compared to other geometries. 35 Furthermore, the authors concluded that the staggered arrangement has better THP than the inline arrangement. [36][37][38] The performance is investigated using the two nondimensional parameters: rib radius to transverse pitch ratio (r/P tv ) and longitudinal pitch to rib radius ratio (P lg /r).…”

Section: Parametric Variationsmentioning

confidence: 99%

“…The rib radius to transverse pitch ratio (r/P tv ) is investigated from 0.1 to 0.35 in six steps at an constant transverse pitch (P tv ) of 25 mm. 13,35,39 Furthermore, the longitudinal pitch to rib radius ratio (P lg /r)is investigated from 4 to 10 in four steps at an optimized value of rib radius (r). 26,40 The Reynolds number is used as the operating conditions which varies in the range from 10,200 to 20,200.…”

Section: Parametric Variationsmentioning

confidence: 99%

“…In a similar manner, the study has been broadened to produce correlation for f. The CFD simulation data points that were obtained were used. A series of data points (f and Re) are presented on a log-log scale in figures (35)(36)(37) for values of r/P tv and P lg /r. For f and Re, the definitive correlation equation (Equation 45) has been discovered.…”

Section: Nu F R P P R Re Prmentioning

confidence: 99%

“…Range/values of geometrical and operating parameters. tv 0.1, 0.15, 0.2, 0.25, 0.3, 0.3535,39 F I G U R E 9 Nu versus Re.…”

mentioning

confidence: 99%

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Thermo‐hydraulic performance investigation of solar air heater duct having staggered D‐shaped ribs: Numerical approach

Dutt,

Hedau,

Kumar

et al. 2024

Heat Trans

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The thermohydraulic performance (THP) of a solar air heater (SAH) duct with staggered D‐shaped ribs as roughness geometry is examined in this work using three‐dimensional numerical investigation. The investigation is carried out at roughness parameters of radius of rib to transverse pitch (r/Ptv) ratios of 0.1–0.35 and longitudinal pitch to radius of rib (Plg/r) ratios of 4–10 under varied operating circumstances of Reynolds number (Re) from 10,200 to 20,200. The maximum Nusselt number (Nu) is obtained to be 81.3 at Re of 20,200, r/Ptv as 0.1, and Plg/r as 4. In contrast, the maximum friction factor (f) is obtained to be 0.0169 at Re of 10,200, r/Ptv as 0.35, and Plg/r as 4. In the range of parameters examined, the maximum enhancement in Nusselt number (Nu/Nus) is observed to be 1.35 at an optimal parameter of r/Ptv as 0.1, Plg/r as 4, and Re as 10,200. Correspondingly, the enhancement in the friction factor (f/fs) at this optimum parameter is 1.87. The maximum value of the THP parameter is found to be 1.1 at the same optimum range of parameters. In further analysis, correlations were developed for Nusselt number (Nu) and friction factor (f) in terms of r/Ptv, Plg/r, and Re with a deviation of ±2% and ±1.5%, respectively.

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Section: Parametric Variationsmentioning

confidence: 99%

Section: Parametric Variationsmentioning

confidence: 99%

Section: Nu F R P P R Re Prmentioning

confidence: 99%

“…Range/values of geometrical and operating parameters. tv 0.1, 0.15, 0.2, 0.25, 0.3, 0.3535,39 F I G U R E 9 Nu versus Re.…”

mentioning

confidence: 99%

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Thermo‐hydraulic performance investigation of solar air heater duct having staggered D‐shaped ribs: Numerical approach

Dutt,

Hedau,

Kumar

et al. 2024

Heat Trans

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Effect of duct length variation on solar air heater performance for smooth and D‐shaped roughened absorber plate

Dutt,

Hedau,

Kumar

et al. 2024

Heat Trans

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The study aims to examine how duct length affects the performance of a solar air heater (SAH) with a D‐shaped ribbed absorber plate, compared to a smooth absorber plate. The optimized D‐shaped ribs from previous research investigations are utilized in the present work to explore the absorber plate's length influence on the Nusselt number. The study reveals a slight decrease in the Nusselt number as the length of the absorber plate with D‐shaped ribs is increased. The observed behavior is attributed to the diminishing capacity of air to extract heat from the heated surface within the elongated duct. Moreover, the study calculates the pressure drop and thermo–hydraulic performance parameter (THPP) associated with the D‐shaped ribs and formulates correlations to establish a quantitative understanding of the relationship between duct length and D‐shaped rib performance. The maximum value of THPP was found to be 1.17 within the considered range of duct height. Furthermore, correlations have been derived for the Nusselt number and friction factor in terms of duct length to hydraulic diameter ratio and Reynolds number with maximum deviations of +1.7 and +2.13, respectively. These correlations serve as valuable tool for engineers and researchers seeking to optimize the design of SAHs, enabling them to balance the benefits of D‐shaped ribs with the considerations of duct length. This research contributes to the growing body of knowledge of SAH design, offering insights into the trade‐offs and intricacies of utilizing D‐shaped ribs and adjusting duct length for improved THPP.

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Thermo-hydraulic performance investigation of double pass solar air heater integrated with PCM-based thermal energy storage

Hedau,

Singal

2024

Journal of Energy Storage

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A review on artificial roughened solar air heaters with and without thermal energy storage

Cited by 3 publications

References 169 publications

Thermo‐hydraulic performance investigation of solar air heater duct having staggered D‐shaped ribs: Numerical approach

Thermo‐hydraulic performance investigation of solar air heater duct having staggered D‐shaped ribs: Numerical approach

Effect of duct length variation on solar air heater performance for smooth and D‐shaped roughened absorber plate

Thermo-hydraulic performance investigation of double pass solar air heater integrated with PCM-based thermal energy storage

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