Abstract
The design of ventilated glass–glass facades in large buildings seems a promising technology to enhance energy efficient building design. In order to describe the optical and thermal heat transfer mechanism in glass–glass configurations with vertical airflow regimes radiation, conduction and convection models have been developed and validated by Arasteh et al. (ASHRAE Trans 95:2, 1989), Manz (Energy Buildings 35(3):305–311, 2003). In application to existing buildings, condensation on various surfaces in the construction is always a risk. A prediction model that takes weather conditions for a specific site into consideration is needed. In this work measured data of condensation on external window panes was used and a mathematical model for predicting condensation depending on air temperature, humidity and airflow regimes was developed by Thyholt (SINTEF Byggforsk, 2006). The validation shows very good agreement and gives confidence in using the model for further analysis of condensation times over the year in this type of façade. The model was implemented in a programme for heat transfer calculations and used to evaluate condensation and energy issues for various façade material configurations.
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Acknowledgments
This chapter has been written within the ongoing SINTEF project “Low Energy Commercial Buildings”. The authors gratefully acknowledge the financial support of the Research Council of Norway.
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Haase, M., Wigenstad, T. (2012). Condensation Issues in Ventilated Façades. In: Öchsner, A., da Silva, L., Altenbach, H. (eds) Materials with Complex Behaviour II. Advanced Structured Materials, vol 16. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-22700-4_31
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DOI: https://doi.org/10.1007/978-3-642-22700-4_31
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