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Energy Analysis of a NZEB Office Building with Rooftop PV Installation: Exploitation of the Employees’ Electric Vehicles Battery Storage

Author

Listed:
  • George Stamatellos

    (Department of Mechanical Engineering, University of Thessaly, 383 34 Volos, Greece)

  • Olympia Zogou

    (Department of Mechanical Engineering, University of Thessaly, 383 34 Volos, Greece)

  • Anastassios Stamatelos

    (Department of Mechanical Engineering, University of Thessaly, 383 34 Volos, Greece)

Abstract

Near zero energy buildings are increasing worldwide, exploiting low-carbon technologies in heating and electricity self-production. Commercial buildings are increasingly considered as candidates for the installation of smart micro-grids, which may profit from the added storage capacity of the batteries of employees electric vehicles, stationed during daytime in their charging lots. Smart exploitation of the interaction of these electricity sources and sinks may prove essential to address the complex electricity network demand patterns in today’s fast changing energy mixture. The interaction of an efficient office building’s energy system with a big rooftop photovoltaic installation and the aggregate storage capacity of 40 electric cars that are connected in the building’s charging lots is studied by means of transient simulation in TRNSYS environment. The 18-zone building’s heating, ventilation, and air conditioning system, the cars’ batteries, and photovoltaic systems’ interactions are analyzed on a monthly, seasonal, and hourly basis, against the respective demand curves of the Greek network. The results suggest that the specific system’s size may profitably support the operation of a smart micro-grid. The total annual electricity consumption of the building is computed to reach 112,000 kWh, or 20 kWh/m 2 y. The annual electricity needs of the 40 electric cars, amounting to 101,000 kWh, can be fully met with 30% of the photovoltaic electricity production. Thus, the building becomes a net exporter of electricity to the network, with maximum exported electricity occurring daily between 12:00 and 14:00, which is favorable to meeting the demand curve. Thus, the establishment of smart micro-grids in commercial buildings with large rooftop photovoltaic panels’ capacity and a significant number of electric cars in the employees’ car fleet is quite effective in this direction.

Suggested Citation

  • George Stamatellos & Olympia Zogou & Anastassios Stamatelos, 2022. "Energy Analysis of a NZEB Office Building with Rooftop PV Installation: Exploitation of the Employees’ Electric Vehicles Battery Storage," Energies, MDPI, vol. 15(17), pages 1-24, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:17:p:6206-:d:898259
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    References listed on IDEAS

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    Cited by:

    1. Elias Roumpakias & Tassos Stamatelos, 2023. "Comparative Performance Analysis of a Grid-Connected Photovoltaic Plant in Central Greece after Several Years of Operation Using Neural Networks," Sustainability, MDPI, vol. 15(10), pages 1-26, May.
    2. Antiopi-Malvina Stamatellou & Olympia Zogou & Anastassios Stamatelos, 2023. "Energy Cost Assessment and Optimization of Post-COVID-19 Building Ventilation Strategies," Sustainability, MDPI, vol. 15(4), pages 1-24, February.
    3. George Stamatellos & Tassos Stamatelos, 2023. "Study of an nZEB Office Building with Storage in Electric Vehicle Batteries and Dispatch of a Natural Gas-Fuelled Generator," Energies, MDPI, vol. 16(7), pages 1-20, April.
    4. Elżbieta Jadwiga Szymańska & Maria Kubacka & Joanna Woźniak & Jan Polaszczyk, 2022. "Analysis of Residential Buildings in Poland for Potential Energy Renovation toward Zero-Emission Construction," Energies, MDPI, vol. 15(24), pages 1-24, December.
    5. Jingyu Cao & Wei Wu & Mingke Hu & Yunfeng Wang, 2023. "Green Building Technologies Targeting Carbon Neutrality," Energies, MDPI, vol. 16(2), pages 1-3, January.

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