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Analysis of the Operation Characteristics of a Hybrid Heat Pump in an Existing Multifamily House Based on Field Test Data and Simulation

Author

Listed:
  • Daniel Neubert

    (Chair of Building Energy Systems and Heat Supply, Technische Universität Dresden, 01062 Dresden, Germany
    Bosch Thermotechnik GmbH, 35457 Lollar, Germany)

  • Christian Glück

    (Bosch Thermotechnik GmbH, 35457 Lollar, Germany)

  • Julian Schnitzius

    (Bosch Thermotechnik GmbH, 35457 Lollar, Germany)

  • Armin Marko

    (Bosch Thermotechnik GmbH, 35457 Lollar, Germany)

  • Jeannette Wapler

    (Fraunhofer Institute of Solar Energy Systems ISE, 79110 Freiburg, Germany)

  • Constanze Bongs

    (Fraunhofer Institute of Solar Energy Systems ISE, 79110 Freiburg, Germany)

  • Clemens Felsmann

    (Chair of Building Energy Systems and Heat Supply, Technische Universität Dresden, 01062 Dresden, Germany)

Abstract

Unrenovated multifamily houses in Germany are mostly heated by fossil heat generators; therefore, measures are required for CO 2 emission reduction. The use of air–water heat pumps is restricted by high required flow temperatures and heat output but can be mitigated by hybrid heat pumps. To limit additional operation costs by the heat pump, a new operation strategy is introduced in this study, which allows to maintain a target CO 2 emission. The operation strategy is applied in a field trial in a small unrenovated multifamily house built in 1964. A thermohydraulic simulation model is verified and is used in full-year simulations to apply improvement measures and compare the new control strategy with existing optimizing strategies. The results show that the control onto target emissions is possible and limits additional costs but can also result in higher CO 2 mitigation costs, making it less favorable. The hybrid heat pump reduces the direct fossil CO 2 emissions by 61% (in total by 22%); thus, it is a relevant solution for multifamily houses, especially within a further decarbonized electrical grid.

Suggested Citation

  • Daniel Neubert & Christian Glück & Julian Schnitzius & Armin Marko & Jeannette Wapler & Constanze Bongs & Clemens Felsmann, 2022. "Analysis of the Operation Characteristics of a Hybrid Heat Pump in an Existing Multifamily House Based on Field Test Data and Simulation," Energies, MDPI, vol. 15(15), pages 1-29, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5611-:d:878756
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    References listed on IDEAS

    as
    1. Erica Roccatello & Alessandro Prada & Paolo Baggio & Marco Baratieri, 2022. "Analysis of the Influence of Control Strategy and Heating Loads on the Performance of Hybrid Heat Pump Systems for Residential Buildings," Energies, MDPI, vol. 15(3), pages 1-19, January.
    2. Klein, Konstantin & Herkel, Sebastian & Henning, Hans-Martin & Felsmann, Clemens, 2017. "Load shifting using the heating and cooling system of an office building: Quantitative potential evaluation for different flexibility and storage options," Applied Energy, Elsevier, vol. 203(C), pages 917-937.
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    Cited by:

    1. Tamás Buday & Erika Buday-Bódi, 2023. "Reduction in CO 2 Emissions with Bivalent Heat Pump Systems," Energies, MDPI, vol. 16(7), pages 1-18, April.

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