HP Source - Integration options for heat sources

Carsten Wemhoener Head of IET Building System Technology Department and Professor

Abstract
With a massive expansion of heat pumps, good heat sources are also required for high efficiency. Particularly in the higher output range above 50 kW and in densely built-up areas, individual heat sources such as outside air or the ground have limitations in terms of noise, space and drilling depth. In the HP-source project, integration options for heat sources were investigated using system simulations with the aim of overcoming the restrictions of individual heat sources and enabling monovalent heat pump operation with high efficiency. The focus was set on two strategies: A peak load coverage, in which both sources are designed to cover part of the heating capacity and the ground source is switched on for the peak load in winter, and a regeneration, in which the ground source is regenerated in summer and in the transition period by a second source, which can also be operated as sole heat source in summer. It was found that both strategies can overcome the limitations of individual sources and that performance and cost benefits can be exploited through synergies and design advantages between the sources, which can even overcompensate for the additional costs of integrating a second heat source, making multi-source systems also interesting for the use without restrictions. Both with peak load coverage and with regeneration, probe fields can also be designed significantly smaller overcoming space and drilling depth limitations.

Full report in German: https://www.aramis.admin.ch/Default?DocumentID=71345&Load=true

Authors: Wemhöner, Carsten; Meier, Christoph; Büsser, Simon; Bätschmann, Marc.

Note: This result was developed outside of the Renowave project.