Abstract :
For the application demonstration of cellulose triacetate (CTA) polymer film based transparent insulation (TI) structures
a technically and ecologically optimized TI facade system was developed and used to equip a south-oriented wall of a
solar house meeting passive house standard in Graz, Austria. The demonstration building was equipped with an appropriate
data recording system for solar irradiation, temperature, heat flux and humidity. The practical experiences within
the heating periods 2002/03 and 2003/04 are reported in this paper. For the optimized TI facade system a solar energy
efficiency of about 43% and a U-value of 0.76 W/(m2 K) were obtained. Although CTA absorbs a high amount of water
no adverse condensation phenomena were observable visually. The reasoning for these findings is explained and related to
construction details.
2006 Elsevier Ltd. All rights reserved.
