The g value of building-integrated solar thermal systems

Innovative building-integrated components provide solar heating, solar control and visual contact to the exterior. However, their contributions to the building are challenging to predict. This paper presents the results of a detailed physical model which show that the g value depends not only on the position of the sun, but also on the collector operation mode. For successful marketing of such innovative components, a new standard would be helpful which clarifies when a detailed model can be considered to be validated by measurements. Customers could then check different applications with easy-to-use models.