Multisource

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Basic data

Summary

The cold local heating network on the Lagarde Campus in Bamberg will be used in the future to supply heat to new and renovated existing buildings. The MultiSource research project plans to examine the interaction of four different innovative heat source systems in detail. A wastewater heat exchanger, geothermal collectors in open spaces and under buildings, and a geothermal probe field will be systematically investigated. The parallel analysis of the geothermal subsystems under the same climatic conditions, but in particular the interactions between the systems with each other and with the wastewater heat exchanger in connection, forms the core of the intended project. Within the framework of the scientific investigations, the heat source systems will be geologically monitored parallel to the construction measures. By using modern geoscientific measuring instruments, all important areas of the subsurface can be specifically analyzed and a maximum efficient connection of the geothermal systems to the ground and the rock can be achieved. At the same time, the measuring concepts of the heat source systems developed in the project are implemented. The measurement technology is used to record the most important system parameters in order to elicit long-term interactions and optimization potentials of the various regenerative sources. The measurement data, together with the soil investigations, are used for the further development of dynamic simulation models. With these, the behavior of the different heat sources in an overall system can be determined and predicted. Corresponding simulation software for the complete system is not yet available and will be developed within the project. All investigations will result in an optimized interaction of the heat source systems, which will always provide the optimal operating point for heating and cooling purposes. Possibilities for seasonal shifting are also being investigated.

The MultiSource research project plans to examine the interaction of four innovative heat source systems in detail on the Lagarde Campus in Bamberg. The heat sources flow into the cold local heating network (KNW network) in the energy center, which supplies new and renovated existing buildings with regenerative heat. For this purpose, measurement technology is systematically introduced in order to record and evaluate the system behavior.

• The use of near-surface geothermal energy in the form of geothermal collectors in open spaces.
• Geothermal collectors under residential buildings, which experience only limited natural regeneration through sun and rain, as well as through the heat flow from the earth's interior, which is almost negligible in the solar-terrestrial zone (first 10 m), are controlled together with geothermal collectors in the open area via a common source network.
• The geothermal probe field is planned as a second geothermal heat source and will be equipped with appropriate measurement technology as part of MultiSource.
• As the fourth innovative heat source of MultiSource, a wastewater heat exchanger with a design capacity of 1,000 kW will be equipped with scientific measurement technology.

Partners

• Institute for Building Climatology

• Bamberg municipal utilities

• Nuremberg University of Technology

• Friedrich-Alexander University Erlangen-Nuremberg

Project coordination

© Michael Kretzschmar

Research assistant

Name

Dipl. Ing. Stephan Hirth

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