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Net Zero Agrivoltaic Arrays for Agrotunnel Vertical Growing Systems: Energy Analysis and System Sizing

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  • Nima Asgari

    (Department of Electrical & Computer Engineering, Western University, London, ON N6A 5B9, Canada)

  • Uzair Jamil

    (Ivey School of Business, Western University, London, ON N6A 5B9, Canada)

  • Joshua M. Pearce

    (Ivey School of Business, Western University, London, ON N6A 5B9, Canada)

Abstract

Local indoor farming plays a significant role in the sustainable food production sector. The operation and energy costs, however, have led to bankruptcy and difficulties in cost management of indoor farming operations. To control the volatility and reduce the electricity costs for indoor farming, the agrivoltaics agrotunnel introduced here uses: (1) high insulation for a building dedicated to vertical growing, (2) high-efficiency light emitting diode (LED) lighting, (3) heat pumps (HPs), and (4) solar photovoltaics (PVs) to provide known electric costs for 25 years. In order to size the PV array, this study develops a thermal model for agrotunnel load calculations and validates it using the Hourly Analysis Program and measured data so the effect of plant evapotranspiration can be included. HPs are sized and plug loads (i.e., water pump energy needed to provide for the hybrid aeroponics/hydroponics system, DC power running the LEDs hung on grow walls, and dehumidifier assisting in moisture condensation in summer) are measured/modeled. Ultimately, all models are combined to establish an annual load profile for an agrotunnel that is then used to model the necessary PV to power the system throughout the year. The results find that agrivoltaics to power an agrotunnel range from 40 to 50 kW and make up an area from 3.2 to 10.48 m 2 /m 2 of an agrotunnel footprint. Net zero agrotunnels are technically viable although future work is needed to deeply explore the economics of localized vertical food growing systems.

Suggested Citation

  • Nima Asgari & Uzair Jamil & Joshua M. Pearce, 2024. "Net Zero Agrivoltaic Arrays for Agrotunnel Vertical Growing Systems: Energy Analysis and System Sizing," Sustainability, MDPI, vol. 16(14), pages 1-32, July.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:14:p:6120-:d:1437332
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    References listed on IDEAS

    as
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