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This study explores the potential of integrating heat pumps and solar photovoltaic (PV) systems to enhance energy efficiency in Irish residential buildings. The case study involves a 334.7 m2 two-story residential building prototype. To assess the energy impact of design modifications, such as those explored in this study, a digital CAD model was utilized. Utilizing energy modelling through DesignBuilder, various retrofit scenarios were assessed, including an air-source heat pump (ASHP), a ground-source heat pump, and their combinations with a PV system. The results indicate that integrating ASHP with PV systems is the most effective approach, achieving a Building Energy Rating (BER) of A2, as opposed to a B2 rating with conventional gas boiler systems. This scenario also offers the highest economic advantages, with a payback period of 3.3 years, alongside a substantial reduction in CO2 emissions (1,768 kg CO2) compared to the gas boiler system (3,826 kg CO2).

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Techno-Economic Analysis of a Residential Building with Electric Heat Pump and Integrated Solar PV System: A Case Study from Ireland

  • 会议论文

  • 发表日期：

    2026年

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  • Mohammad Saffari,
  • Jean-Baptiste Mestrallet,
  • Adamantios Bampoulas,
  • Eleni Mangina

摘要

This study explores the potential of integrating heat pumps and solar photovoltaic (PV) systems to enhance energy efficiency in Irish residential buildings. The case study involves a 334.7 m2 two-story residential building prototype. To assess the energy impact of design modifications, such as those explored in this study, a digital CAD model was utilized. Utilizing energy modelling through DesignBuilder, various retrofit scenarios were assessed, including an air-source heat pump (ASHP), a ground-source heat pump, and their combinations with a PV system. The results indicate that integrating ASHP with PV systems is the most effective approach, achieving a Building Energy Rating (BER) of A2, as opposed to a B2 rating with conventional gas boiler systems. This scenario also offers the highest economic advantages, with a payback period of 3.3 years, alongside a substantial reduction in CO2 emissions (1,768 kg CO2) compared to the gas boiler system (3,826 kg CO2).