Measurement Data-Based Estimation of the Suitability of Existing Properties for the Operation of x to Water Heat Pumps Using a Seed of 100 Multi-Family Houses and Different Power Shifting Approaches

Simon Jurkschat, Florian Felix Sehr (), Karsten Fransen, Andre Beblek and Viktor Grinewitschus
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Simon Jurkschat: EBZ Business School, University of Applied Sciences, 44795 Bochum, Germany
Florian Felix Sehr: EBZ Business School, University of Applied Sciences, 44795 Bochum, Germany
Karsten Fransen: EBZ Business School, University of Applied Sciences, 44795 Bochum, Germany
Andre Beblek: EBZ Business School, University of Applied Sciences, 44795 Bochum, Germany
Viktor Grinewitschus: EBZ Business School, University of Applied Sciences, 44795 Bochum, Germany

Energies, 2023, vol. 16, issue 21, 1-15

Abstract: The German government’s ambitious goal of achieving CO 2 neutrality by 2045 has prompted a focus on improving building insulation as a vital step toward energy efficiency. However, in this process, existing radiators and boilers are often left unchanged. Moreover, during the construction of buildings, heating systems are often designed with excess capacity to ensure there is no risk of insufficient heat supply during operation. This research presents various approaches to reduce the required radiator supply temperature, utilizing data from a study conducted in 100 multifamily buildings. The approaches encompass reducing the heat reserve, shifting the heat output, optimizing radiator utilization, and conducting heat demand analysis. The findings reveal that in pre-existing buildings equipped with radiators, it is possible to significantly lower supply temperatures without affecting the indoor temperature. Applied on the seed, reducing the heat reserve could reduce the median temperature by 18.5 K, thus curtailed by the most utilized radiator in the median to 7 K. Furthermore, the heat demand analysis showed that the consumption could decrease in the median by 13%, the peaks in median even by 29%. While each approach is analyzed individually, their combined implementation has the potential to considerably enhance the efficiency of water-to-water heat pumps, thanks to the reduced requirement for high supply temperatures.

Keywords: low-temperature ready; low-temperature heating; heat pump; sustainable heating; low-temperature radiator (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: 2023
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