Experimental Investigations on Heat Transfer and Friction Factor of Silver Nanofliud in Absorber/Receiver of Parabolic Trough Collector with Twisted Tape Inserts

Waghole, Dnyaneshwar R.; Warkhedkar, Ravi M.; Kulkarni, V. S.; Shrivastva, R. K.

doi:10.1016/j.egypro.2014.01.060

Cited by 73 publications

(26 citation statements)

References 8 publications

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“…The correlation for Nu and lie in the range of ± 4 % and ± 7 % respectively. Similar studies were performed by Song et al [5], Waghole et al [6], Ghadirijafarbeigloo et al [7] and Zhu et al [8].…”

Section: Introductionsupporting

confidence: 72%

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Twisted Tape Based Heat Transfer Enhancement In Parabolic Trough Concentrator – An Experimental study

Elton

Arunachala

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Heat transfer at boiling of refrigerants in channels with twisted tape insert A V Shishkin, S E Tarasevich and A B Yakovlev Abstract. The heat transfer augmentation in parabolic trough concentrator is gaining importance now a days as it makes the system compact and efficient. Out of various techniques, use of twisted tape inserts is popular due to easy implementation as well as substantial enhancement in system performance. Most of the studies in this field pertaining to experimental/computational analysis with respect to both outdoor and indoor set ups. The rise in convective coefficient of heat transfer fluid due to insert has been studied by many researchers. But such studies are based on uniform heat flux or out-field non-uniform based which is under uncontrollable environment. Hence in the present study, Nusselt number correlations for plain absorber and absorber with twisted tape (y=3.48, 5.42 and 7.36) are developed under the realistic condition of solar concentration with controlled environment. The parity plot shows the maximum deviation of 20% which in turn indicates better quality of fit. IntroductionSolar energy has been used by both nature and human kind throughout time in many ways. It is used to heat and cool buildings (both actively and passively), heat water for domestic and industrial uses, heat swimming pools, power refrigerators, operate engines and pumps, desalinate water for drinking purposes, generate electricity, for chemistry applications, and many more operations. Because of the desirable environmental and safety aspects it is widely believed that solar energy should be utilized instead of other conventional energy forms. Out of different applications of solar energy, the power generation by focusing type of collectors is gaining popularity now a days. Parabolic trough power plants consist of large field of parabolic trough collectors (PTC), a heat transfer fluid/steam generation system, a Rankine steam turbine/generator cycle, and optional thermal storage and/or fossil-fired backup systems. The performance of PTC is based on optical and thermo-hydraulic configuration. Due to advanced optics technology presently in use, researchers have focused on performance enhancement of receivers taking into account various geometrical treatments.

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Section: Introductionsupporting

confidence: 72%

“…In equation (6), Uo can be raised by increasing hfi as rest all parameters (except UL) remains unchanged. However, UL is inversely proportional to hf i.…”

Section: Heat Transfer Augmentation In Ptcmentioning

confidence: 99%

Twisted Tape Based Heat Transfer Enhancement In Parabolic Trough Concentrator – An Experimental study

Elton

Arunachala

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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“…They showed that nanofluids have excellent potential for power tower applications with 5 to 10% improvement in efficiency. Waghole et al [24] experimentally investigated the heat transfer and friction factor of silver nanofluids in the absorber/receiver of a parabolic trough receiver with twisted tape inserts. Recently, Sokhansefat et al [25] investigated heat transfer enhancement in a parabolic trough collector tube using a synthetic oil-Al 2 O 3 nanofluid for the nanoparticle concentration less than 5% and operating temperatures of 300 K, 400 K and 500 K. They showed that the heat transfer performance increases as the volumetric concentration of nanoparticles increases.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic optimisation of the performance of a parabolic trough receiver using synthetic oil–Al 2 O 3 nanofluid

2015

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In this paper, results of a thermodynamic analysis using the entropy generation minimisation method for a parabolic trough receiver tube making use of a synthetic oil-Al 2 O 3 nanofluid as a heat transfer fluid are presented. A parabolic trough collector system with a rim angle of Nanoparticle volume fractions in the range 0 ≤ ϕ ≤ 8% were used. The local entropy generation rates due to fluid flow and heat transfer were determined numerically and used for the thermodynamic analysis. The study shows that using nanofluids improves the thermal efficiency of the receiver by up to 7.6%. There is an optimal Reynolds number at each inlet temperature and volume fraction for which the entropy generated is a minimum. The optimal Reynolds number decreases as the volume fraction increases. There is also a Reynolds number at every inlet temperature and volume fraction beyond which use of nanofluids is thermodynamically undesirable.

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“…The efficiency was shown to increase between 5 and 10% with the use of 7 nanofluids. Waghole et al [35] experimentally investigated the performance of a parabolic trough system with silver nanofluids in the absorber/receiver with twisted tape inserts.…”

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confidence: 99%

Thermal performance and entropy generation analysis of a high concentration ratio parabolic trough solar collector with Cu-Therminol®VP-1 nanofluid

Mwesigye

Huan

Meyer

2016

Energy Conversion and Management

202

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This paper presents results of a numerical study on the thermal and thermodynamic performance of a high concentration ratio parabolic trough solar collector using Cu- Above a certain Reynolds number, further increase in the Reynolds numbers makes the entropy generation higher than that of a receiver with only the base fluid. Key wordsConcentration ratio, entropy generation, nanofluid, parabolic trough receiver, thermal efficiency. †

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Experimental Investigations on Heat Transfer and Friction Factor of Silver Nanofliud in Absorber/Receiver of Parabolic Trough Collector with Twisted Tape Inserts

Cited by 73 publications

References 8 publications

Twisted Tape Based Heat Transfer Enhancement In Parabolic Trough Concentrator – An Experimental study

Twisted Tape Based Heat Transfer Enhancement In Parabolic Trough Concentrator – An Experimental study

Thermodynamic optimisation of the performance of a parabolic trough receiver using synthetic oil–Al 2 O 3 nanofluid

Thermal performance and entropy generation analysis of a high concentration ratio parabolic trough solar collector with Cu-Therminol®VP-1 nanofluid

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