Experimental analysis for augmentation of heat transfer in multiple discrete V-patterns combined with staggered ribs solar air heater

Patel, Sumer Singh; Lanjewar, Atul

doi:10.1016/j.ref.2018.03.003

Cited by 41 publications

(6 citation statements)

References 29 publications

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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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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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“…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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“…On the other hand, the results of Pandey et al 25 indicate that the highest increment in friction factor and Nusselt number obtained by using this type of roughness are equal 4.96 and 5.85 times of smooth duct. Furthermore, Patel and Lanjewar 26 they have found that the highest enhancement in Nusselt number and friction factor are equal 2.27 and 4.28 times of smooth duct. Ravi and Saini 27 examined the impacts of roughness coefficients on the thermal‐hydraulic performance of double‐pass collector with a discrete multi V‐shaped and staggered rib and compared with smooth ducts.…”

Section: Introductionmentioning

confidence: 96%

Improving the performance of solar air heater using a new model of V‐corrugated absorber plate having perforations jets

Maher

Salih

2022

Intl J of Energy Research

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Summary An experimental investigation on the performance of a solar air heater (SAH) system has been performed using a new model of v‐corrugated absorber plate having perforations jets. The effectiveness of new model has been compared with the conventional v‐corrugated absorber plate under identical operating conditions to display the effectiveness of new model. The new collector has been referred to Model‐1, whereas the conventional model has been referred to Model‐2. The experimentations have been conducted in December 2020. The results demonstrate that the performance of Model‐1 is considerably higher than Model‐2 by 9%, 11%, and 11.5% for the air mass flowrates 0.01, 0.015, and 0.02 kg/s, respectively. As mass flowrate is increased, the performances of both models have increased, where the highest efficiencies of Model‐1 and Model‐2 have been found 84.5% and 73%, respectively. A substantial difference in temperature has been found in Model‐1 as compared to the rest model. Regardless of the air velocity values, the maximum outlet temperatures have been found in Model‐1, whereas the peak plate temperatures have been observed in Model‐2. The improvement in the performance of Model‐1 confirms that the utilize of perforations jets v‐corrugated absorber plate has an extreme action on the rate of heat transfer.

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Experimental analysis for augmentation of heat transfer in multiple discrete V-patterns combined with staggered ribs solar air heater

Cited by 41 publications

References 29 publications

Compound passive heat transfer augmentation techniques: A comprehensive review

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

Improving the performance of solar air heater using a new model of V‐corrugated absorber plate having perforations jets

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