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Greenhouse applications of solar photovoltaic driven heat pumps in northern environments

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  • Asgari, Nima
  • Hayibo, Koami Soulemane
  • Groza, Julia
  • Rana, Shafquat
  • Pearce, Joshua M.

Abstract

Greenhouses play a crucial role in food production and economic growth in northern regions but contribute significantly to energy consumption and carbon emissions. To address this challenge and enhance food production sustainably, there is a growing need for efficient and renewable energy solutions. Low-carbon heating in greenhouses will be achievable by using heat pumps powered by cost-effective renewable energy sources such as photovoltaic systems. This study introduces an open-source quasi-steady-state thermal model for greenhouses, non-ideal air-source heat pumps (ASHPs), and ground-source heat pumps (GSHPs) with both vertical (V) and horizontal (H) ground heat exchangers. Additionally, a ventilation sub-model is provided to manage cooling loads for residential, semi-commercial, and commercial greenhouses. Furthermore, an open-source SAM-Python-based photovoltaic system model is developed to size photovoltaic arrays for powering the heat pumps. The study reveals a nonlinear relationship between greenhouse size and annual thermal loads. It also demonstrates that ASHPs exhibit the lowest efficiency (COPh = 2.52, EERc = 9.00), followed by VGSHPs (COPh = 3.68, EERc = 19.88), with HGSHPs being the most efficient (COPh = 3.79, EERc = 19.48) for the Canadian case study. The required on-grid photovoltaic ratings to power HGSHPs, VGSHPs, and ASHPs respectively are 2.16, 2.17, and 2.64 kW for residential, 103, 104, and 128 kW for semi-commercial, and 827, 831, and 1,028 kW for commercial greenhouses. Self-consumption of designed photovoltaic systems ranges from 23.5 % to 25.1 %, with self-sufficiency varying between 23.7 % and 26.0 %. The size of the photovoltaic system is competitive with similar scenarios; however, future studies are needed to conduct an economic analysis while simulating the dynamic loads of greenhouses.

Suggested Citation

  • Asgari, Nima & Hayibo, Koami Soulemane & Groza, Julia & Rana, Shafquat & Pearce, Joshua M., 2025. "Greenhouse applications of solar photovoltaic driven heat pumps in northern environments," Renewable and Sustainable Energy Reviews, Elsevier, vol. 207(C).
    • Handle: RePEc:eee:rensus:v:207:y:2025:i:c:s1364032124006464
    DOI: 10.1016/j.rser.2024.114920
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    References listed on IDEAS

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    1. Kayaci, Nurullah, 2020. "Energy and exergy analysis and thermo-economic optimization of the ground source heat pump integrated with radiant wall panel and fan-coil unit with floor heating or radiator," Renewable Energy, Elsevier, vol. 160(C), pages 333-349.
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    1. Daniel Pfister & Arnold Johan Rix & Marthinus Johannes Booysen, 2025. "Augmenting Residential AC Electric Water Heating with Dedicated Direct-to-Element DC Solar Photovoltaic," Energies, MDPI, vol. 18(4), pages 1-16, February.

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