Evaluation of the energy efficiency of heat supply systems of a residential building with heat pumps based on computer simulation

Authors

  • I. Sukhodub National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” , Національний технічний університет України «Київський політехнічний інститут імені Ігоря Сікорського»
  • V. Shklyar National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” , Національний технічний університет України «Київський політехнічний інститут імені Ігоря Сікорського»
  • V. Dubrovska National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” , Національний технічний університет України «Київський політехнічний інститут імені Ігоря Сікорського»
  • O. Yatsenko National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” , Національний технічний університет України «Київський політехнічний інститут імені Ігоря Сікорського»
  • P. Serdechnyi National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” , Національний технічний університет України «Київський політехнічний інститут імені Ігоря Сікорського»

DOI:

https://doi.org/10.31548/energiya1(71).2024.142

Abstract

This article presents an analysis of the energy efficiency of the heating system of a single-family residential building with the integration of a heat pump (HP) using climate data for Kyiv city. Specialized software complexes for calculation (GeoT*SOL), dynamic energy modeling (DesignBuilder/EnergyPlus), and techno-economic justification of HP systems implementation (RETScreen) were used for this purpose. The analysis was conducted for two types of HPs: air-to-water (air-based) and ground-source (ground-based), considering various temperature regimes of the indoor heating system. Based on the modeling results, it was determined that for an air-to-water HP with a nominal capacity of 7 kW, the average seasonal efficiency rating could be approximately 3.6 for the HP itself and 2.7 for the overall system. For a ground-source HP with a nominal capacity of 6 kW, the average seasonal efficiency rating is 4.7 for the HP itself and 3.75 for the overall system. The total electricity consumption varies within the range of 4800–5700 kWh for air-based HP and 3200–4300 kWh for ground-based HP. Depending on the HP capacity, the share of heating energy coverage ranges from 85-98% for ground-based HP and 79-98% for air-based HP. The simple payback period of the HP-based heating system compared to electric convectors is 15.2–17.0 years.

Key words: energy efficiency, building energy modeling, climate data, heat pump, nearly zero-energy buildings

References

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Published

2024-04-08

Issue

No. 1 (2024)

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Статті

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