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Heating and building cooling in energy standard KfW 40

In Hamburg Bahrenfeld, Weinmann Emergency Medical Technology GmbH is constructing a new building as its company headquarters with 10,000 m2 GFA with the support of Harmonia Immobilien (project development). goodmen energy was commissioned to develop an eligible, economical energy concept based on a heat pump system for the non-residential building.

Due to the local conditions and at the client's request, special attention was paid to the geothermal possibilities. goodmen energy planned to supply the building with heating and cooling by means of a geothermal probe field, a brine-to-water heat pump and a PV system that generates the electricity to operate the system. In addition, the detailed technical planning of the geothermal probe field was carried out in LP 4-5. With the regenerative heat recovery from the earth, the CO2 emissions could be reduced in a cost-benefit-optimised way.

Our services:

Regenerative energy concept

Energy supply planning

Approval and implementation planning for geothermal probes

Layout simulation

Position and strand planning

Pressure loss calculations


Geothermal exploration measures were planned and accompanied using the Thermal Response Test (TRT) and Geothermal Response Test (GRT). A site check with potential analysis of the renewable energies available at the site was also carried out. In the process, goodmen energy also provided formal proof that the subsurface is geothermal-capable. The engineers developed a bivalent source system (geothermal/air) for heating and cooling with appropriate dimensioning of the geothermal probe field. The energy supply system was then economically optimised across all components.
The detailed technical planning in work phases 4 and 5 included the system and the probe field. The planning of the plant technology took place in close cooperation with the sister company BDKplan.