Solar Combisystems - IEA SHC Task 26

Documentation, comparison and optimisation of solar combisystems for domestic hot water preparation and space heating in the framework of an IEA research project

Content Description




Task 26 is a major research project of the International Energy Agency (IEA) Solar Heating and Cooling Programme. The IEA, founded in 1974, is an autonomous body within the framework of the Organisation for Economic Co-operation and Development (OECD). Twenty four member countries and the European Commission carry out a comprehensive programme of energy co-operation. Policy goals include the ability to respond promptly and flexibly to energy emergencies; environmentally sustainable provision and efficient use of energy; research, development and market deployment of new and improved technologies; and co-operation among energy market participants.

These goals are addressed within the framework of 40 Implementing Agreements. One of the first R&D Implementing Agreements of the IEA was the «Solar Heating and Cooling Programme» (SHC). Since 1977 in the SHC twenty-six projects or "Tasks" have been undertaken.

Task 26 involves 32 experts from nine European countries and the USA and 16 solar industries. The goal of this research project is to further develop and optimise solar combisystems for detached single-family houses, groups of single-family houses, and multi-family houses with their own heating installations. Furthermore, standardised classification and evaluation processes are being developed for these systems within the framework of this project. These processes serve as a basis for the elaboration of suggestions for the international standardisation of combisystem test procedures. Task 26 will be completed by the end of 2001. A comprehensive survey on solar combisystem design and good practice will be the end deliverable from the Task.

The demand for solar heating systems for combined domestic-hot-water preparation and space heating is increasing rapidly in several countries. In some countries, such as Austria, Denmark, Germany and Switzerland they have a noteworthy market- share.

Austrian Participation
Austria participates in Task 26 with 3 experts from AEE INTEC (Arbeitsgemeinschaft ERNEUERBARE ENERGIE, Institute for Sustainable Technologies) and two experts from the Graz University of Technology, Institute of Thermal Engineering.
Werner Weiß from AEE INTEC acts as Operating Agent of Task 26 for the Austrian Ministry of Transport, Innovation and Technology.

Austrian industry participants are the companies S.O.L.I.D., Sonnenkraft and Solarteam.

Project Partners

Project manager
Werner Weiß

Internationale Energieagentur (IEA)
Solar Heating and Cooling Programme


Werner Weiß
Feldgasse 19
A 8200 Gleisdorf
Tel.: +43 3112 5886-17
Fax: +43 3112 5886-18