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Highlights: [•] We provided the MIM4DC, a new algorithm for dual control. [•] The proposed algorithm combines identification and control criteria. [•] The MIM4DC outperforms standard MPC formulation. [•] The result is a trade-off between the performance and persistent excitation. [Copyright &y& Elsevier]

Abstract: Climate changes, diminishing world supplies of non-renewable fuels, as well as economic aspects are probably the most significant driving factors of the current effort to save energy. As buildings account for about 40% of global final energy use, efficient building climate control can significantly contribute to the saving effort. Predictive building automation can be used to operate buildings in an energy and cost effective manner with minimum retrofitting requirements. In such a predictive control approach, dynamic building models are of crucial importance for a good control performance. An algorithm which has not been used in building modeling yet, namely a combination of minimization of multi-step ahead prediction errors and partial least squares will be investigated. Subsequently, two case studies are presented: the first is an artificial model of a building constructed in Trnsys environment, while the second is a real-life case study. The proposed identification algorithm is then validated and tested. [Copyright &y& Elsevier]