Germany

IEA HPP Annex 40 Bundesamt für Energie BFE IEA Heat Pump Centre iea International Energy Agency‌
 

Germany

Germany is represented by the Fraunhofer Institute of Solar Energy systems (FhG-ISE).

National team leader

Dr.-Ing. Doreen Kalz
Head of Group Building Analysis and Energy Concepts
Division Thermal Systems and Buildings
Fraunhofer Institute of Solar Energy systems ISE
Heidenhofstrasse 2
79110 Freiburg, Germany
Phone: +49(0)761 / 4588-5403
Fax: +49(0)761 / 4588-9000
doreen.kalz(at)ise.fraunhofer.de
http://www.ise.fraunhofer.de

National Team

Dominik Wystrcil
Thermal Systems and Buildings
Fraunhofer Institute of Solar Energy systems ISE
Heidenhofstrasse 2
79110 Freiburg, Germany
Phone: +49(0)761 / 4588-5125
Fax: +49(0)761 / 4588-9000
dominik.wystrcil(at)ise.fraunhofer.de
http://www.ise.fraunhofer.de

Simon Winiger
Thermal Systems and Buildings
Fraunhofer Institute of Solar Energy systems ISE
Heidenhofstrasse 2
79110 Freiburg, Germany
Phone: +49(0)761 / 4588-5125
Fax: +49(0)761 / 4588-9000
simon.winiger(at)ise.fraunhofer.de
http://www.ise.fraunhofer.de

National project

The increase of energy efficiency of buildings is a fundamental political goal in Germany to reduce CO2-emissions. Besides the reduction of the energy demand of buildings by insulation and façade optimization measures, a key element is the realization of an energy efficient heat and cold supply system by high performance systems. In particular heat pumps will play an essential role in the reduction of energy consumption of buildings for heating and cooling applications and are therefore adressed in this project.

The central goal of the project is the analysis of the quality of state of the art heat pump systems in low energy buildings. By this, this study shall present the status quo concerning energy performance, energy efficiency, operational performance as well as hydraulic integration of heat pumps in low energy buildings and net zero energy buildings. Furthermore, weak points and success factors for an energy efficient implementation of heat pumps in nZEB will be identified.

The analysis is based on realized heat pump systems in non-residential buildings. The installed heat pump capacity is hereby typically higher than 25 kWtherm. Measurement data of 20 demonstration buildings with a high temporal resolution is available. The measurement data include heat flows, flow temperatures and electricity consumption of compressors of heat pumps and chillers as well as circulation pumps. The evaluation of the energy performance of the heating and cooling systems is conducted concerning different system boundaries from the environmental heat sources and sinks, over heat pumps and chillers, buffer storages and heat distribution system to the building’s thermal zones. In a cross-analysis the buildings and plants are compared to each other.

As a result of the analysis characteristic numbers and benchmarks will be available for the evaluation and optimization of heat pumps systems in net zero energy buildings. Furthermore, good practice examples will be presented. The results of the analysis of German buildings will be discussed and compared to results in the frame of European and international buildings.

Figure 1: From left to right: (i) inHaus2 in Duisburg, Germany (ii-iii) heat pump with turbo compressor, (iv) concrete core conditioning

National links

Bundesverband Wärmepumpe
The website provides information about heat pumps and contact information to members.
Information in German at:
http://www.waermepumpe.de