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

Daniel Neubert, Christian Glück, Julian Schnitzius, Armin Marko, Jeannette Wapler, Constanze Bongs and Clemens Felsmann
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Daniel Neubert: Chair of Building Energy Systems and Heat Supply, Technische Universität Dresden, 01062 Dresden, 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

Energies, 2022, vol. 15, issue 15, 1-29

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.

Keywords: hybrid heat pump; bivalent heat pump; field test; building simulation; decarbonization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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