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A detailed literature survey of studies carried out during the last 10 years in opaque solar facades has been performed. The studies reviewed were grouped into the following five systems: building-integrated solar thermal. building-integrated photovoltaic. building-integrated photovoltaic thermal. thermal storage wall and solar chimney. Building-integrated solar thermal technology certainly presents an interest since it is a relatively simple technology. Still it is not yet fully optimized. For example. the impact of wind is not yet well understood. Nevertheless. new coatings are now extending the versatility of this technology. Building-integrated photovoltaic offers many advantages. They can produce a significant amount of energy. which in the best conditions can even exceed the buildings internal consumption. In addition. in some configurations PV wall can significantly reduce cooling loads. Also in some designs. the air flow behind the PV panel can both cool them. which improves their efficiency and reduces the heat load on the building.
