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IEA SHC Task 68: Efficient Solar District Heating Systems

The TCP SHC has set itself the goal that solar energy technologies will cover more than 50 % of the heating and cooling demand for buildings in 2050 and thus contribute significantly to reduce CO2 emissions worldwide.

In this context, the SHC Task 55 has already been successfully completed and dealt with the technical and economic parameters and requirements of very large solar thermal plants (>0.5 MW to GW). The work on the topic of solar district heating systems should now be continued in the new Task 68 - Efficient Solar District Heating Systems, and expanded to include latest issues and developments. The new task therefore pursues 4 main goals:

  1. Efficiently providing heat at the desired temperature level of local/district heating systems by solar technology
  2. Increasing the degree of digitalisation of solar thermal systems
  3. Reducing costs of solar local/district heating systems and identify new business models
  4. Raising awareness and spread in-depth knowledge regarding latest developments and results of solar local/district heating systems.

Task 68 is intended to provide a platform for research and industry to work together on the opportunities, challenges and benefits related to these main objectives on an international level under the leadership of Austria. For this purpose, Task 68 is divided into 4 subtasks:


(Subtask structure of the international task 68)

In addition to the leadership of the entire task, Subtask B is led by an Austrian partner as well. Furthermore, a large number of leading Austrian experts from industry and science are involved in the national consortium.

From today's perspective, the Austrian consortium will play a leading role in achieving the following results:

  • Evaluation/further development of possibilities for the efficient provision of heat at medium to higher temperatures directly or indirectly through solar technology (e.g. coupling solar technology with heat pumps).
  • Development and evaluation of requirements, concepts and configurations for the optimal design and construction of solar district heating systems for the efficient and cost-effective provision of heat at the desired temperatures of current district heating networks, considering seasonal storage.
  • Further development and investigation of test methods for determining the performance of different collector technologies in field and laboratory tests.
  • Describe and collect efficient solutions for collecting, storing and distributing data from heterogeneous devices at single and multi-plant level.
  • Develop criteria, guidelines and measures for the validation of data from solar district heating systems and collect, summarise and evaluate techniques for the analysis, monitoring and fault detection of solar district heating systems.
  • Comparison and evaluation of advanced control strategies at component (e.g. collector control) and system level (e.g. total system control).
  • Workshops and lectures for industry and scientific experts on task results.

https://task68.iea-shc.org/

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