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Compact Decentral Façade-Integrated Air-to-Air Heat Pumps for Serial Renovation of Multi-Apartment Buildings

Author

Listed:
  • Fabian Ochs

    (Unit for Energy Efficient Building, Faculty of Engineering Sciences, University of Innsbruck, 6020 Innsbruck, Austria)

  • William Monteleone

    (Unit for Energy Efficient Building, Faculty of Engineering Sciences, University of Innsbruck, 6020 Innsbruck, Austria)

  • Georgios Dermentzis

    (Unit for Energy Efficient Building, Faculty of Engineering Sciences, University of Innsbruck, 6020 Innsbruck, Austria)

  • Dietmar Siegele

    (Fraunhofer Italia, 39100 Bolzano, Italy)

  • Christoph Speer

    (Unit for Energy Efficient Building, Faculty of Engineering Sciences, University of Innsbruck, 6020 Innsbruck, Austria)

Abstract

To address the huge market of renovation of multi-apartment buildings, minimal-invasive decentral serial-renovation solutions are required. One major challenge in the design of decentral heat pumps is to find the optimal balance between, on one hand, compactness and pleasant design, and on the other hand, efficiency and minimal sound emissions. A comprehensive holistic design and optimization process for the development of decentral heat pumps, from the component level, to the system level, and up to the building level, is developed. A novel façade-integrated speed-controlled exhaust air to supply air heat pump combined with a mechanical ventilation system with heat recovery and recirculation air was developed and simulated in a reference flat. Compared to a traditional supply air heat pump without recirculation, it shows only slight performance improvement, but allows significantly better thermal comfort and control, independently from the hygienic air flow rate and from the heating and cooling loads. Detailed measurement and simulation results are presented for several functional models with heating power of around 1 kW up to 2.5 kW. The design was optimized by means of CFD simulations to allow for low pressure drop, homogeneous flow, and low sound emissions. Moreover, mock-ups of innovative façade-integrated heat pump outdoor units are presented.

Suggested Citation

  • Fabian Ochs & William Monteleone & Georgios Dermentzis & Dietmar Siegele & Christoph Speer, 2022. "Compact Decentral Façade-Integrated Air-to-Air Heat Pumps for Serial Renovation of Multi-Apartment Buildings," Energies, MDPI, vol. 15(13), pages 1-30, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4679-:d:848139
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    References listed on IDEAS

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    1. Janne Hirvonen & Juha Jokisalo & Juhani Heljo & Risto Kosonen, 2019. "Towards the EU Emission Targets of 2050: Cost-Effective Emission Reduction in Finnish Detached Houses," Energies, MDPI, vol. 12(22), pages 1-29, November.
    2. Edoardo Ruffino & Bruno Piga & Alessandro Casasso & Rajandrea Sethi, 2022. "Heat Pumps, Wood Biomass and Fossil Fuel Solutions in the Renovation of Buildings: A Techno-Economic Analysis Applied to Piedmont Region (NW Italy)," Energies, MDPI, vol. 15(7), pages 1-25, March.
    3. Ala, G. & Orioli, A. & Di Gangi, A., 2019. "Energy and economic analysis of air-to-air heat pumps as an alternative to domestic gas boiler heating systems in the South of Italy," Energy, Elsevier, vol. 173(C), pages 59-74.
    4. Fabian Ochs & Mara Magni & Georgios Dermentzis, 2022. "Integration of Heat Pumps in Buildings and District Heating Systems—Evaluation on a Building and Energy System Level," Energies, MDPI, vol. 15(11), pages 1-33, May.
    5. Psimopoulos, Emmanouil & Bee, Elena & Widén, Joakim & Bales, Chris, 2019. "Techno-economic analysis of control algorithms for an exhaust air heat pump system for detached houses coupled to a photovoltaic system," Applied Energy, Elsevier, vol. 249(C), pages 355-367.
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    Cited by:

    1. Paula Sankelo & Kaiser Ahmed & Alo Mikola & Jarek Kurnitski, 2022. "Renovation Results of Finnish Single-Family Renovation Subsidies: Oil Boiler Replacement with Heat Pumps," Energies, MDPI, vol. 15(20), pages 1-18, October.

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