Trade-off between wire matrix and twisted tape: SOLTRACE® based indoor study of parabolic trough collector

Varun, K and Arunachala, U C and Elton, D N (2020) Trade-off between wire matrix and twisted tape: SOLTRACE® based indoor study of parabolic trough collector. Renewable Energy, 156. ISSN 0960-1481

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Abstract

Heat transfer augmentation using turbulators in PTC is well known. However, based on the methodology its thermo-hydraulic rating can vary. In the present experimental study, variations of wire matrix and twisted tape have been used to analyse the thermo-hydraulic behavior of the PTC by referring two approaches viz. thermo-hydraulic efficiency and performance evaluation criterion. An innovative method comprising, analytical model-SOLTRACE®- differential resistance heating is incorporated to simulate the highly non-uniform solar irradiance over the receiver in an indoor test rig. Under the same operating condition, thermo-hydraulic efficiency of medium dense wire matrix is maximum whereas twisted tape of twist ratio 3.37 yields better result as per performance evaluation criterion. However, thermohydraulic efficiency based analysis is recommended due to the role of realistic pumping power. Further, variation in energy parameters viz. thermal efficiency, pumping power, Nusselt number and their effect on receiver length have been analyzed. The trade-off between two inserts is also discussed with respect to operating condition.

Item Type: Article
Uncontrolled Keywords: Wire matrix Non-uniform heat flux Thermo-hydraulic efficiency Performance evaluation criteria Pumping power Length optimization
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 06 Oct 2020 10:38
Last Modified: 06 Oct 2020 10:38
URI: http://eprints.manipal.edu/id/eprint/155809

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