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Exergetic Analysis of a New Direct Steam Generation Solar Plant Using Screw Expanders

Author

Listed:
  • Paolo Iodice

    (Dipartimento di Ingegneria Industriale, Università degli Studi di Napoli Federico II, 80125 Napoli, Italy)

  • Giuseppe Langella

    (Dipartimento di Ingegneria Industriale, Università degli Studi di Napoli Federico II, 80125 Napoli, Italy)

  • Amedeo Amoresano

    (Dipartimento di Ingegneria Industriale, Università degli Studi di Napoli Federico II, 80125 Napoli, Italy)

Abstract

Screw expanders are volumetric machines particularly suitable in energy conversion with steam–liquid mixtures and for the exploitation of low temperature heat sources. This study explored the main criteria to evaluate the thermodynamic advantages and exergetic assessment of an innovative solar electricity generation system: Screw expanders are utilized as power machines and parabolic trough collectors as a thermal source. Such a direct steam generation solar system, which is based on the Rankine cycle, offers benefits in comparison with usual power plants with dynamic expanders: The best exploitation of low temperature heat sources, satisfactory thermal efficiency with steam–liquid mixtures, lower evaporation pressures, and reduced size. Under real working conditions, screw expanders can work at part-load operating conditions; thus, the chief purpose of the present paper was to analyze the exergetic advantages of the planned solar power system when solar radiation and off-design working conditions fluctuate. Initially, the polytropic expansion phase with a specific numerical model is described to evaluate the energy losses that affect the thermodynamic performance of screw expanders when installed in the planned renewable energy power plant. Subsequently, to explore the exergy harnessing in the exhausted steam at off-design working conditions and then to appraise the maximum exergetic efficiency of the proposed screw expander-based solar thermal electricity plant, numerical optimization was performed in a broad range of evaporation and condensation temperatures.

Suggested Citation

  • Paolo Iodice & Giuseppe Langella & Amedeo Amoresano, 2020. "Exergetic Analysis of a New Direct Steam Generation Solar Plant Using Screw Expanders," Energies, MDPI, vol. 13(3), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:720-:d:317667
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    References listed on IDEAS

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    1. Li, Jing & Li, Pengcheng & Gao, Guangtao & Pei, Gang & Su, Yuehong & Ji, Jie, 2017. "Thermodynamic and economic investigation of a screw expander-based direct steam generation solar cascade Rankine cycle system using water as thermal storage fluid," Applied Energy, Elsevier, vol. 195(C), pages 137-151.
    2. Tang, Hao & Wu, Huagen & Wang, Xiaolin & Xing, Ziwen, 2015. "Performance study of a twin-screw expander used in a geothermal organic Rankine cycle power generator," Energy, Elsevier, vol. 90(P1), pages 631-642.
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    4. Montes, M.J. & Rovira, A. & Muñoz, M. & Martínez-Val, J.M., 2011. "Performance analysis of an Integrated Solar Combined Cycle using Direct Steam Generation in parabolic trough collectors," Applied Energy, Elsevier, vol. 88(9), pages 3228-3238.
    5. Li, Jing & Li, Pengcheng & Pei, Gang & Alvi, Jahan Zeb & Ji, Jie, 2016. "Analysis of a novel solar electricity generation system using cascade Rankine cycle and steam screw expander," Applied Energy, Elsevier, vol. 165(C), pages 627-638.
    6. Tian, Yafen & Xing, Ziwen & He, Zhilong & Wu, Huagen, 2017. "Modeling and performance analysis of twin-screw steam expander under fluctuating operating conditions in steam pipeline pressure energy recovery applications," Energy, Elsevier, vol. 141(C), pages 692-701.
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    8. Li, Pengcheng & Li, Jing & Gao, Guangtao & Pei, Gang & Su, Yuehong & Ji, Jie & Ye, Bin, 2017. "Modeling and optimization of solar-powered cascade Rankine cycle system with respect to the characteristics of steam screw expander," Renewable Energy, Elsevier, vol. 112(C), pages 398-412.
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    Cited by:

    1. Paolo Iodice & Amedeo Amoresano & Giuseppe Langella & Francesco Saverio Marra, 2023. "Numerical Optimization and Energetic Advantages of an Innovative Solar Power System Based on Scheffler Receiver Coupled with Volumetric Expanders," Energy & Environment, , vol. 34(3), pages 602-620, May.
    2. Olga Orynycz & Karol Tucki, 2020. "Technology Management Leading to a Smart System Solution Assuring a Decrease of Energy Consumption in Recreational Facilities," Energies, MDPI, vol. 13(13), pages 1-22, July.
    3. Paolo Iodice & Enrico Fornaro & Massimo Cardone, 2022. "Hybrid Propulsion in SI Engines for New Generation Motorcycles: A Numerical-Experimental Approach to Assess Power Requirements and Emission Performance," Energies, MDPI, vol. 15(17), pages 1-13, August.

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