Experimental Analysis of Zinc Oxide/Water/Ethylene Glycol-Based Nanofluid in a Square Duct Roughened With Inclined Ribs

Kumar, Sunil; Shandilya, Mamta; Chauhan, Ankush; Maithani, Rajesh; Kumar, Anil

doi:10.1615/jenhheattransf.2020034180

Cited by 11 publications

(8 citation statements)

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“…They have provided dimple shapes, protrusions, and arc shapes at the tube periphery; the use of nanofluids also improves the overall efficiency of the system. 55,56 Apart from all these the supporting structure of the parabolic trough has been also discussed, which should be light in weight but strong enough to counter the wind load and torque; it should also have the property of two axes solar tracking. It has been analyzed from the extensive study that twisted tape inserts has maximum influence on the SPT efficiency due to wide geometrical modification possible in twisted tapes for producing the mixture of both swirl flow with turbulence and, they have found very useful to dissipate the high heat flux at the boundary of the tube wall in case of high solar concentrators like SPT.…”

Section: Discussionmentioning

confidence: 99%

A review study on the performance of a parabolic trough receiver using twisted tape inserts

Thapa

Samir

Kumar³

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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Heat transfer in concentrating solar collectors like parabolic troughs has proven nowadays a very efficient method by using different passive techniques to increase the heat transfer rate. The use of passive techniques also increases the pumping power requirements to make the flow through the receiver. So, a number of researchers are working to find out the optimum performance conditions for parabolic trough receivers by using different types of inserts in flow paths. This paper presents a wide range of literature available for solar parabolic troughs in one place. Based on this extensive study, it is found that twisted tape inserts is a very wide field for investigation and the use of different shapes, pitch value, free space, and angle of twist tape are the parameters that can be considered for further studies to improve the performance of solar troughs. Also, various combinations of perforation and cuts on twisted tapes can be used to achieve enhanced performance.

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Section: Discussionmentioning

confidence: 99%

A review study on the performance of a parabolic trough receiver using twisted tape inserts

Thapa

Samir

Kumar³

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…The nanofluid containing the

Si O_{2}

nanomaterial delivers the highest thermal performance. Kumar et al 17 investigated the thermal performance of the square duct with

ZnO / water / ethylene glycol

‐based nanofluid. The study of the

CuO

‐water nanofluid inside a heat exchanger with turbulent promoter in the form of louvered strips was carried out by Nakhchi and Esfahani 18 .…”

Section: Introductionmentioning

confidence: 99%

Parametric optimization of heat exchanger tube having twisted tape turbulent promoters and silicon oxide nanofluid

Agarwal

Maithani

Sharma

et al. 2022

Intl J of Energy Research

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Summary The optimization of heat exchanger tube parametric having SiO2/H2O based nanofluid flow through the twisted tape insert. The optimization basis is to maximize the heat transfer function and minimize the pressure drop function. The parameters selected for optimization are: twisted tape width to diameter ratio WT/DT, twisted length to width ratio (LT/WT), and the nano particle concentration ϕ. The analysis is carried out for Reynolds number (Re) ranging from 5000 to 17 000. The analysis reveals that the parameter values that delivers the maximum heat transfer with minimum pressure drop is optimized parameter value for a selected range of Re. The optimum value of parameters are WT/DT of 0.8, LT/WT of 1.74, and ϕ of 1.25 vol.% and Re of 17 000.

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“…Studies reveal that the SiO 2 -H 2 O NF has a maximum heat transfer coefficient (HTC) in correlation with the other NFs. Kamali and Ali-Reja [7] and Kumar et al [8] examined turbulent flow in a square conduit with four ribs' shapes. e outcomes showed that inter-rib distribution affected HTC.…”

Section: Introductionmentioning

confidence: 99%

Development of New Correlations and Parametric Optimization in Nanofluid Flow through Protruded Roughened Square Channel

Kumar

Gupta

Tchier

et al. 2022

Mathematical Problems in Engineering

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This study discusses the optimization of heat-transfer parameters in nanofluid flow through a rough square surface channel including a protruded rib compound transverse pattern using response surface methodology (RSM). Flow and geometrical characteristics are optimized, resulting in optimal flow friction and heat transfer performances. The comparison of RSM’s estimated values to experimentally observed values was abandoned. The results demonstrate that the RSM-calculated values agree with the observed values and are within the 5.5 percent uncertainty limitations. Statistical correlations for Nusselt number and friction factor have been developed as functions of protrusion transverse rib height, protrusion transverse rib diameter, X-axis pitch, Y-axis pitch, and Reynolds number. These correlations have been found to predict the values within the error limits of ±8.9% and ±8.7%, respectively. On the basis of correlations developed for Nusselt number and friction factor, an attempt has been made to compare the thermohydraulic performance of protruded roughened square channel.

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Experimental Analysis of Zinc Oxide/Water/Ethylene Glycol-Based Nanofluid in a Square Duct Roughened With Inclined Ribs

Cited by 11 publications

References 0 publications

A review study on the performance of a parabolic trough receiver using twisted tape inserts

A review study on the performance of a parabolic trough receiver using twisted tape inserts

Parametric optimization of heat exchanger tube having twisted tape turbulent promoters and silicon oxide nanofluid

Development of New Correlations and Parametric Optimization in Nanofluid Flow through Protruded Roughened Square Channel

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