The authors wish to thank the colleagues working together in the group “Materials for Solar Thermal Collectors" of the Solar Heating and Cooling Program of the International Energy Agency, especially Stefan Brunold, Bo Carlsson, Ueli Frei, Ole Holck, Kenneth Moller, Markus Muller, Henk Oversloot and Svend Svendsen.

The work was financially supported by the Federal Minster for Research and Technology of Germany (Contract No. 0329600B/9).

3. References

Kohl, Michael; Heck, Markus; KObler, Volker, MOller, Markus; Steinhart, Josef; Troscher, Thomas: Mikroklima in Kollektoren. Internationales Symposium fur thermische und photovoltaische Sonnenenergienutzung, Gleisdorf, Osterreich, 9.-12.9.1998.

Holck, Ole; Svendsen, Svend; Brunold, Stefan; Frei, Ueli; Kohl, Michael; Heck, Markus; Oversloot, Henk: Solar collector desing with respect to moisture problems. Solar Energy 75, 2003.

Frei, Ueli; Brunold, Stefan; Kohl, Michael; Troscher, Thomas; Carlsson, Bo; Moller, Kenneth: Air ventilation rate of solar thermal collectors. In: Proceedings North Sun, Espoo, Finland 9.­11.6.1997.

Kohl, Michael; Brunold, Stefan; Carlsson, Bo; Frei, Ueli; Heck, Markus; Holck, Ole; Jorgensen, Gary; KObler, Volker; Moller, Kenneth; Oversloot, Henck; Roos, Arne; Svendsen, Svend: Performance and Durabilitiy Assessment of Optical Materials for Solar Thermal Systems. Edited by Al Czanderna. To be published Elsevier 2004.

Kohl, Michael; Heck, Markus; KObler, Volker: PrOfung und Optimierung des Mikroklimas in Solarkollektoren. 14. Symposium Thermische Solarenergie, Bad Staffelstein, 12.-14. Mai 2004.