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Energy and exergy analyses of an industrial wood chips drying process

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  • Can Coskun
  • Murad Bayraktar
  • Zuhal Oktay
  • Ibrahim Dincer

Abstract

In this study, a comprehensive thermodynamic investigation through energy and exergy analyses is conducted to assess the performance of an industrial chips drying process and study how its operating conditions and efficiency can be improved further. In this regard, energy and exergy efficiencies are evaluated with the actual thermodynamic data available, as obtained from the factory, in Turkey. Energy and exergy efficiencies of the drum drying system (DDS) are found as 34.07% and 4.39%, respectively. The analysis results show that exergy efficiency is less than energy efficiency. The main reason of this low exergy efficiency for this drying process is high exergy destruction, as 41.5% of input exergy value. Energy can be recovered via an economizer from hot moist air leaving from the system. If stack gas temperature decreases from 130 to 90°C, regain energy and exergy values are to be 51 976 and 8162 kW, respectively. These recovered potentials can be used for district heating system in winter season and for district cooling system in summer season by using absorption cooling system. Energy and exergy efficiency values can be increased to 93.15 and 43.08%, respectively, by incorporating a heat exchanger into the system. Copyright The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org, Oxford University Press.

Suggested Citation

  • Can Coskun & Murad Bayraktar & Zuhal Oktay & Ibrahim Dincer, 2009. "Energy and exergy analyses of an industrial wood chips drying process," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 4(4), pages 224-229, July.
    • Handle: RePEc:oup:ijlctc:v:4:y:2009:i:4:p:224-229
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctp024
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    Cited by:

    1. Sogut, Z. & Ilten, N. & Oktay, Z., 2010. "Energetic and exergetic performance evaluation of the quadruple-effect evaporator unit in tomato paste production," Energy, Elsevier, vol. 35(9), pages 3821-3826.
    2. Kenji Koido & Eri Takata & Takashi Yanagida & Hirofumi Kuboyama, 2022. "Techno-Economic Assessment of Heat Supply Systems in Woodchip Drying Bases for Wood Gasification Combined Heat and Power," Sustainability, MDPI, vol. 14(24), pages 1-14, December.
    3. Aghbashlo, Mortaza & Mobli, Hossein & Rafiee, Shahin & Madadlou, Ashkan, 2013. "A review on exergy analysis of drying processes and systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 22(C), pages 1-22.
    4. El Hallaoui, Zhor & El Hamdani, Fayrouz & Vaudreuil, Sébastien & Bounahmidi, Tijani & Abderafi, Souad, 2022. "Identifying the optimum operating conditions for the integration of a solar loop to power an industrial flash dryer: Combining an exergy analysis with genetic algorithm optimization," Renewable Energy, Elsevier, vol. 191(C), pages 828-841.
    5. Lamidi, Rasaq. O. & Jiang, L. & Pathare, Pankaj B. & Wang, Y.D. & Roskilly, A.P., 2019. "Recent advances in sustainable drying of agricultural produce: A review," Applied Energy, Elsevier, vol. 233, pages 367-385.

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