General Information
    • ISSN: 1793-821X (Print)
    • Abbreviated Title: J. Clean Energy Technol.
    • Frequency: Quarterly (2013-2014); Bimonthly (Since 2015)
    • DOI: 10.18178/JOCET
    • Editor-in-Chief: Prof. Haider F. Abdul Amir
    • Executive Editor: Ms. Jennifer Zeng
    • Abstracting/ Indexing: EI (INSPEC, IET), Electronic Journals Library, Chemical Abstracts Services (CAS), Ulrich's Periodicals Directory, Google Scholar, ProQuest.
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School of Science and Technology Universiti Malaysia Sabah, Malaysia.
I would like to express my appreciation to all authors, reviewers and editors.

JOCET 2016 Vol.4(1): 8-19 ISSN: 1793-821X
DOI: 10.7763/JOCET.2016.V4.246

Effect of Using Twisted Tape Inserts on Performance of Compound Parabolic Concentrators

M. H. Eldakamawy, A. Hanafi, and M. A. Kassem
Abstract—Modeling of a compound parabolic collector with bare tubular absorber was performed, regarding its geometrical, optical and thermal features. The developed model was validated via two recent experiments showing accepted agreement with the experimental results. After that we studied the effect of inserting different configurations of twisted tapes in the absorber tube on the thermal efficiency, the pumping power and the thermal performance factor. It was concluded that inserting twisted tapes is much favorable when the flow was laminar rather than being in transition or turbulent regimes.

Index Terms—Compound parabolic concentrators, heat transfer enhancement, modeling, swirl flow.

The authors are with the Mechanical Power Department, Faculty of Engineering, Cairo University, Egypt (e-mail:,,


Cite:M. H. Eldakamawy, A. Hanafi, and M. A. Kassem, "Effect of Using Twisted Tape Inserts on Performance of Compound Parabolic Concentrators," Journal of Clean Energy Technologies vol. 4, no. 1, pp. 8-19, 2016.

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