Performance study of solar air heater duct with gap in V-rib with symmetrical gap and staggered ribs

Patel, Sumer Singh; Lanjewar, Atul

doi:10.1007/s00231-019-02592-3

Cited by 24 publications

(7 citation statements)

References 36 publications

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“…f r and f s are the friction factors for roughened and smooth surfaces. A THPP greater than unity indicates that an absorber with fins/ribs/roughness is potentially beneficial [72]. Table 1 shows the thermal hydraulic performance parameters of different ribs.…”

Section: Geometry Of Fins/ribsmentioning

confidence: 99%

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

Hassan,

Nikbakht,

Fawzia

et al. 2024

Energies

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Supply disruptions, uncertainty, and unprecedented price rises of fossil fuels due to the recent pandemic and war have highlighted the importance of using renewable sources to meet energy demands. Solar air collectors (SACs) are major types of solar energy systems that can be utilized for space and water heating, drying, and thermal energy storage. Although there is sufficient documentation on the thermal analyses of SACs, no comprehensive reviews of the exergetic performance or qualitative insight on heat conversion are available. The primary objective of this article is to provide a comprehensive review on the optimum conditions at which the thermal performance of diverse types of solar air collectors is optimized. The effect of operating parameters such as temperature rise, flow rate, geometric parameters, solar radiation, and the Reynolds number on the thermal performance of SACs in terms of thermal hydraulic performance, energy, and exergy efficiencies has been reviewed adaptively. Beyond the operating parameters, a deep investigation is outlined to monitor fluid dynamics using analytical and computational fluid dynamics (CFDs) methodologies in the technology of SACs. In the third phase, thermodynamic irreversibility due to optical losses, thermal losses between absorber and environment, heat losses due to insulation, edge losses, and entropy generation are reported and discussed, which serve as the fundamental tools for optimization purposes.

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Section: Geometry Of Fins/ribsmentioning

confidence: 99%

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

Hassan,

Nikbakht,

Fawzia

et al. 2024

Energies

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“…Patel and Lanjewar 63,73,74 carried out a series of experimental studies with the objective of enhancing the thermo-hydraulic performance of a SAH that had been deliberately roughened with an array of discontinuous V-shaped ribs along with staggered elements. The researchers came to the conclusion that the Nu value and the friction factor had a close connection with the relative length of the staggered ribs as well as the number of gaps.…”

Section: Pec Numentioning

confidence: 99%

Compound passive heat transfer augmentation techniques: A comprehensive review

Al‐Chlaihawi,

Hasan,

Ekaid

2023

Heat Trans

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The function of energy is becoming increasingly vital in meeting the requirements of modern societies and sustaining rapid economic and industrial growth globally. Heat transfer equipment has been employed for heat recovery and conversion in various domestic and industrial applications. Therefore, due to the recent global energy crisis, boosting the thermal efficiency of energy systems has become an essential requirement, which would reduce both their size and rates of energy demand. There are active and passive methods for boosting heat transfer rates. As they have no moving components, passive methods are more affordable and dependable than active ones. Applying two or more passive techniques concurrently will result in a higher heat transmission rate than any approach working independently. The current article comprehensively reviews experimental and computational investigations of passive compound forced convection heat transfer augmentation techniques at laminar, transition, and turbulent flow regimes. This article focuses on compound techniques arrangement in the form of turbulators, typical twisted tapes (TTs), surface roughness, vortex generators, and so on. The pioneering research suggests that using a lower twist ratio, lower pitch, and smaller winglet angles in TTs can result in higher heat transfer rates, albeit with a slightly increased friction factor. The combination of alternate‐axes and wings in TTs leads to more effective heat transfer enhancement within the tube.

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“…Patel and Lanjewar70–72Jain and Lanjewar 73 were carried out their investigation for V-down with symmetrical gaps and combined with staggered rib roughness geometry SAH which is shown supplementary Fig. 26.…”

Section: Application Of Wire Ribs and Its Different Geometries In Sah...mentioning

confidence: 99%

A detailed review on research, technology, configurations and application of wire ribs as artificial roughness in rectangular solar air heater duct

Sahu¹,

Priyam

Mishra³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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Use of artificial roughness in the duct of solar air heater (SAH) has been an interesting area of research during the last few decades. In present review article a holistic view about application of circular shape wire ribs as roughness element and its different geometry on the absorber plate of SAH duct for performance enhancement has been done. This article, reported in details numerous experimental as well as analytical studies for rib roughened SAHs which have been carried out by different researchers positively. Correlations for heat transfer and friction factor, developed by various investigators for different artificially roughened solar air heaters (SAHs) geometry have been reported in chronological order and in well tabulated form. The roughness and operating parameters into which investigators have obtained their maximum performances of SAHs have also been presented separately in the table. Effects of various rib roughness parameters on heat transfer and fluid flow process are also discussed in details.

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Performance study of solar air heater duct with gap in V-rib with symmetrical gap and staggered ribs

Cited by 24 publications

References 36 publications

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

Compound passive heat transfer augmentation techniques: A comprehensive review

A detailed review on research, technology, configurations and application of wire ribs as artificial roughness in rectangular solar air heater duct

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