Project description
The energy transition is making significant progress in the state of Schleswig- Holstein, not least due to its geographical location, economic and social structure. In addition to the expansion of the use of renewable energy in the electricity supply connected with this, serious structural changes are also pending in the heating supply. In addition to the possibility of increasingly providing heating directly with the help of renewable energy in the future, there is currently a particular focus on the sector-coupling concept of "power-to-heat", which uses electrical energy generated from renewable energy sources for heating wherever possible. Compression heat pump technology is particularly important due to its high efficiency.
The focus is on the use of such heat pumps in grid-connected heat supply, i.e. in local and district heating networks. There they can be used together with other generation technologies and with the aid of central thermal energy storage systems to cover demand.
Compared to decentralised heat pumps in individual households, the advantages are the central intervention and the long-term usable supply structure. However, there are sometimes considerable technical differences between heat pumps for domestic use and those for central heat supply systems. For example, the temperature levels of such heat pumps differ significantly. This leads to further special features on the technology side, such as the working media or circuits used. Furthermore, there are various options for integration into the supply structure. No technology concept has yet been clearly established.
This project investigates under which circumstances which technical concepts for central heat supply with high-temperature heat pumps in multivalent supply structures are economically attractive in the short and medium term and to what extent this has a positive ecological impact on the energy supply system.
For this purpose, different technical concepts are mapped in thermodynamic detail and simulated under different boundary conditions in the sense of an economically optimal system operation. The attractiveness of the concepts and their system effects are assessed on the basis of the resulting operating and framework data that apply to the surrounding supply system and the plant itself. The range of investigations to be carried out should cover different working media and circuits as well as different heat supply systems and scenarios for the entire energy supply. In this way, technology concepts can be identified whose implementation is particularly attractive for the stakeholders and therefore likely in the short and medium term.
