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Simplified Method of Optimal Sizing of a Renewable Energy Hybrid System for Schools

Author

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  • Jiyeon Kim

    (Green Building Center, Korea Appraisal Board, Seoul 06225, Korea)

  • Eui-Jong Kim

    (Department of Architectural Engineering, Inha University, Incheon 22212, Korea)

Abstract

Schools are a suitable public building for renewable energy systems. Renewable energy hybrid systems (REHSs) have recently been introduced in schools following a new national regulation that mandates renewable energy utilization. An REHS combines the common renewable-energy sources such as geothermal heat pumps, solar collectors for water heating, and photovoltaic systems with conventional energy systems (i.e., boilers and air-source heat pumps). Optimal design of an REHS by adequate sizing is not a trivial task because it usually requires intensive work including detailed simulation and demand/supply analysis. This type of simulation-based approach for optimization is difficult to implement in practice. To address this, this paper proposes simplified sizing equations for renewable-energy systems of REHSs. A conventional optimization process is used to calculate the optimal combinations of an REHS for cases of different numbers of classrooms and budgets. On the basis of the results, simplified sizing equations that use only the number of classrooms as the input are proposed by regression analysis. A verification test was carried out using an initial conventional optimization process. The results show that the simplified sizing equations predict similar sizing results to the initial process, consequently showing similar capital costs within a 2% error.

Suggested Citation

  • Jiyeon Kim & Eui-Jong Kim, 2016. "Simplified Method of Optimal Sizing of a Renewable Energy Hybrid System for Schools," Sustainability, MDPI, vol. 8(11), pages 1-16, November.
    • Handle: RePEc:gam:jsusta:v:8:y:2016:i:11:p:1134-:d:82106
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    References listed on IDEAS

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    Cited by:

    1. José Manuel Salmerón Lissén & Laura Romero Rodríguez & Francisco Durán Parejo & Francisco José Sánchez de la Flor, 2018. "An Economic, Energy, and Environmental Analysis of PV/Micro-CHP Hybrid Systems: A Case Study of a Tertiary Building," Sustainability, MDPI, vol. 10(11), pages 1-15, November.
    2. Seung Hyo Baek & Byung Hee Lee, 2019. "Optimal Decision-Making of Renewable Energy Systems in Buildings in the Early Design Stage," Sustainability, MDPI, vol. 11(5), pages 1-19, March.
    3. Akbar Maleki & Marc A. Rosen & Fathollah Pourfayaz, 2017. "Optimal Operation of a Grid-Connected Hybrid Renewable Energy System for Residential Applications," Sustainability, MDPI, vol. 9(8), pages 1-20, July.
    4. Rania M. Ghoniem & Ali Alahmer & Hegazy Rezk & Samer As’ad, 2023. "Optimal Design and Sizing of Hybrid Photovoltaic/Fuel Cell Electrical Power System," Sustainability, MDPI, vol. 15(15), pages 1-19, August.

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