Experimental validation of energy parameters in parabolic trough collector with plain absorber and analysis of heat transfer enhancement techniques

F. R. Bilal, U. C. Arunachala, H. M. Sandeep

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

The quantum of heat loss from the receiver of the Parabolic Trough Collector is considerable which results in lower thermal efficiency of the system. Hence heat transfer augmentation is essential which can be attained by various techniques. An analytical model to evaluate the system with bare receiver performance was developed using MATLAB. The experimental validation of the model resulted in less than 5.5% error in exit temperature using both water and thermic oil as heat transfer fluid. Further, heat transfer enhancement techniques were incorporated in the model which included the use of twisted tape inserts, nanofluid, and a combination of both for further enhancement. It was observed that the use of evacuated glass cover in the existing setup would increase the useful heat gain up to 5.3%. Fe3O4/H2O nanofluid showed a maximum enhancement of 56% in the Nusselt number for the volume concentration of 0.6% at highest Reynolds number. Similarly, twisted tape turbulators (with twist ratio of 2) taken alone with water exhibited 59% improvement in Nusselt number. Combining both the heat transfer augmentation techniques at their best values revealed the Nusselt number enhancement up to 87%. It is concluded that, use of twisted tape with water is the best method for heat transfer augmentation since it gives the maximum effective thermal efficiency amongst all for the range of Re considered. The first section in your paper.

Original languageEnglish
Article number012030
JournalJournal of Physics: Conference Series
Volume953
Issue number1
DOIs
Publication statusPublished - 06-02-2018

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plains
troughs
accumulators
absorbers
heat transfer
augmentation
Nusselt number
tapes
thermodynamic efficiency
energy
receivers
water
high Reynolds number
inserts
oils
heat
heating
glass
fluids

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Experimental validation of energy parameters in parabolic trough collector with plain absorber and analysis of heat transfer enhancement techniques",
abstract = "The quantum of heat loss from the receiver of the Parabolic Trough Collector is considerable which results in lower thermal efficiency of the system. Hence heat transfer augmentation is essential which can be attained by various techniques. An analytical model to evaluate the system with bare receiver performance was developed using MATLAB. The experimental validation of the model resulted in less than 5.5{\%} error in exit temperature using both water and thermic oil as heat transfer fluid. Further, heat transfer enhancement techniques were incorporated in the model which included the use of twisted tape inserts, nanofluid, and a combination of both for further enhancement. It was observed that the use of evacuated glass cover in the existing setup would increase the useful heat gain up to 5.3{\%}. Fe3O4/H2O nanofluid showed a maximum enhancement of 56{\%} in the Nusselt number for the volume concentration of 0.6{\%} at highest Reynolds number. Similarly, twisted tape turbulators (with twist ratio of 2) taken alone with water exhibited 59{\%} improvement in Nusselt number. Combining both the heat transfer augmentation techniques at their best values revealed the Nusselt number enhancement up to 87{\%}. It is concluded that, use of twisted tape with water is the best method for heat transfer augmentation since it gives the maximum effective thermal efficiency amongst all for the range of Re considered. The first section in your paper.",
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Experimental validation of energy parameters in parabolic trough collector with plain absorber and analysis of heat transfer enhancement techniques. / Bilal, F. R.; Arunachala, U. C.; Sandeep, H. M.

In: Journal of Physics: Conference Series, Vol. 953, No. 1, 012030, 06.02.2018.

Research output: Contribution to journalConference article

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