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towers as useful energy) can also be used to adjust the consumption to the PV production, thermal energy could be stored and adjust the swimming pool depuration system. 4. Conclusion Applying a smart systems and RES to the hotels can result in a large economic, energetic saving and a reduction in CO2 emissions without change in client comfort and increase the RES integration, especially the Solar PV systems. By changing from fossil fuels for renewable energy sources (like photovoltaic, wind power and solar thermal), we can arrive at zero or even negative building energy. Promoting and investing on renewable energies to combat CO2 emissions is the way to stop to discharge more than 50,000 tons per year with a properly electric mix. The overall zero balance in the Mallorca-Menorca system is overall positive in the order to cover Tertiary sector consumption. References [1] IBAE. Les Illes Balears en Xifres 1999-2009. Palma de Mallorca (2010). [2] DG de Energia. Govern de les Illes Balears. Estadístiques Energètiques 2017. [3] Dascalaki E., Balaras C.A. [2004] XENIOS—a methodology for assessing refurbishment scenarios and the potential of application of RES and RUE in hotels. Energy and Buildings 36 (2004) 1091–1105. [4] Boletín IDAE:Eficiencia Energética y Energías Renovables (N º2,6) Depósito Legal:M-24028-2001, M- 18505-2004. [5] Pérez-Lombard, L.a , Ortiz, J.b , Pout, C.b .A review on buildings energy consumption information. Energy and Buildings. (2010) [6] Flourentzou F., J.L. Genre and C.-A. Roulet (2002) “TOBUS software ¯¯ an interactive decision aid tool for building retrofit studies” Energy & Buildings, Vol. 34, pp. 193-202 [7] Conselleria de Turisme de les Illes Balears. El turisme a les Illes Balears, dades informatives 2017 [8] M. Karagiorgas, V. Drosou, Th. Tsoutsos. «Solar Energy and RES for the Tourism Sector”, International Conference “RES for Island: RES and RUE for Islands, Sustainable Energy Solutions”, 30-31 August 2004, Larnaka(Cyprus). [9] Moià-Pol, Andreu. Diagnosis & Innovation in the energy management at Balearic Touristic Industry (Diagnosi i innovació en els processos de producció i gestió energètica en equipaments turístics de les Illes Balears) , Ph.D. Thesis, Universitat Politecnica de Catalunya, 2012. [10] Red Electrica de España http://www.ree.es/ A.Moià-Pol etal. / IntelligentEnergyConsumption in theBalearic IslandsHotels 105