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Development and Validation of a Thermo-Economic Model for Design Optimisation and Off-Design Performance Evaluation of a Pure Solar Microturbine

Author

Listed:
  • Davide Iaria

    (Department of Mechanical Engineering & Aeronautics, School of Mathematics, Computer Science & Engineering, University of London, London EC1V 0HB, UK)

  • Homam Nipkey

    (Institutt for energi-og petroleumsteknologi, Stavanger University, 4036 Stavanger, Norway)

  • Jafar Al Zaili

    (Department of Mechanical Engineering & Aeronautics, School of Mathematics, Computer Science & Engineering, University of London, London EC1V 0HB, UK)

  • Abdulnaser Ibrahim Sayma

    (Department of Mechanical Engineering & Aeronautics, School of Mathematics, Computer Science & Engineering, University of London, London EC1V 0HB, UK)

  • Mohsen Assadi

    (Institutt for energi-og petroleumsteknologi, Stavanger University, 4036 Stavanger, Norway)

Abstract

The aim of this paper is to present a thermo-economic model of a microturbine for solar dish applications, which demonstrates the applicability and accuracy of the model for off-design performance evaluation and techno-economic optimisation purposes. The model is built using an object-oriented programming approach. Each component is represented using a class made of functions that perform a one-dimensional physical design, off-design performance analysis and the component cost evaluation. Compressor, recuperator, receiver and turbine models are presented and validated against experimental data available in literature, and each demonstrated good accuracy for a wide range of operating conditions. A 7-kW e microturbine and solar irradiation data available for Rome between 2004 and 2005 were considered as a case study, and the thermo-economic analysis of the plant was performed to estimate the levelised cost of electricity based on the annual performance of the plant. The overall energy produced by the plant is 10,682 kWh, the capital cost has been estimated to be EUR 27,051 and, consequently, the specific cost of the plant, defined as the ratio between the cost of components and output power in design condition, has been estimated to be around EUR 3980/kW e . Results from the levelised cost of electricity (LCOE) analysis demonstrate a levelised cost of electricity of EUR 22.81/kWh considering a plant lifetime of 25 years. The results of the present case study have been compared with the results from IPSEpro 7 where the same component characteristic maps and operational strategy were considered. This comparison was aimed to verify the component matching procedure adopted for the present model. A plant sizing optimisation was then performed to determine the plant size which minimises the levelised cost of electricity. The design space of the optimisation variable is limited to the values 0.07–0.16 kg/s. Results of the optimisation demonstrate a minimum LCOE of 21.5 [EUR/kWh] for a design point mass flow rate of about 0.11 kg/s. This corresponds to an overall cost of the plant of around EUR 32,600, with a dish diameter of 9.4 m and an annual electricity production of 13,700 [kWh].

Suggested Citation

  • Davide Iaria & Homam Nipkey & Jafar Al Zaili & Abdulnaser Ibrahim Sayma & Mohsen Assadi, 2018. "Development and Validation of a Thermo-Economic Model for Design Optimisation and Off-Design Performance Evaluation of a Pure Solar Microturbine," Energies, MDPI, vol. 11(11), pages 1-26, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3199-:d:183687
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    References listed on IDEAS

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    1. Gavagnin, Giacomo & Rech, Sergio & Sánchez, David & Lazzaretto, Andrea, 2018. "Optimum design and performance of a solar dish microturbine using tailored component characteristics," Applied Energy, Elsevier, vol. 231(C), pages 660-676.
    2. Zou, Chongzhe & Zhang, Yanping & Falcoz, Quentin & Neveu, Pierre & Zhang, Cheng & Shu, Weicheng & Huang, Shuhong, 2017. "Design and optimization of a high-temperature cavity receiver for a solar energy cascade utilization system," Renewable Energy, Elsevier, vol. 103(C), pages 478-489.
    3. Galanti, Leandro & Massardo, Aristide F., 2011. "Micro gas turbine thermodynamic and economic analysis up to 500kWe size," Applied Energy, Elsevier, vol. 88(12), pages 4795-4802.
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    Cited by:

    1. Davide Iaria & Xin Zhou & Jafar Al Zaili & Qiang Zhang & Gang Xiao & Abdulnaser Sayma, 2019. "Development of a Model for Performance Analysis of a Honeycomb Thermal Energy Storage for Solar Power Microturbine Applications," Energies, MDPI, vol. 12(20), pages 1-19, October.

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