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On–off-Grid Optimal Hybrid Renewable Energy Systems for House Units in Iraq

Author

Listed:
  • Hussain Alshamri

    (College of Education for the Humanities, University of Kerbala, Karbala Entrance Street–Hilla, Karbala 56001, Iraq)

  • Timothy Cockerill

    (School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK)

  • Alison S. Tomlin

    (School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK)

  • Moustafa Al-Damook

    (Department of Quality Assurance and Academic Accreditation, University of Fallujah, Al Sad Street, Fallujah 31002, Iraq
    Renewable Energy Research Centre, University of Anbar, Ramadi 31001, Iraq)

  • Mansour Al Qubeissi

    (College of Engineering Technology, University of Doha for Science and Technology, Arab League St, Doha 24449, Qatar
    School of Mechanical Engineering, Faculty of Engineering, Environment and Computing, Coventry University, Coventry CV1 2JH, UK)

Abstract

This paper addresses the optimal sizing of Hybrid Renewable Energy Systems (HRESs), encompassing wind, solar, and battery systems, with the aim of delivering reliable performance at a reasonable cost. The focus is on mitigating unscheduled outages on the national grid in Iraq. The proposed On–off-grid HRES method is implemented using MATLAB and relies on an iterative technique to achieve multi-objectives, balancing reliability and economic constraints. The optimal HRES configuration is determined by evaluating various scenarios related to energy flow management, electricity prices, and land cover effects. Consumer requirements regarding cost and reliability are factored into a 2D optimization process. A battery model is developed to capture the dynamic exchange of energy among different renewable sources, battery storage, and energy demands. A detailed case study across fifteen locations in Iraq, including water, desert, and urban areas, revealed that local wind speed significantly affects the feasibility and efficiency of the HRES. Locations with higher wind speeds, such as the Haditha lake region (payback period: 7.8 years), benefit more than urban areas (Haditha city: payback period: 12.4 years). This study also found that not utilizing the battery, particularly during periods of high electricity prices (e.g., 2015), significantly impacts the HRES performance. In the Haditha water area, for instance, this technique reduced the payback period from 20.1 to 7.8 years by reducing the frequency of charging and discharging cycles and subsequently mitigating the need for battery replacement.

Suggested Citation

  • Hussain Alshamri & Timothy Cockerill & Alison S. Tomlin & Moustafa Al-Damook & Mansour Al Qubeissi, 2024. "On–off-Grid Optimal Hybrid Renewable Energy Systems for House Units in Iraq," Clean Technol., MDPI, vol. 6(2), pages 1-23, May.
    • Handle: RePEc:gam:jcltec:v:6:y:2024:i:2:p:32-624:d:1391107
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    References listed on IDEAS

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