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oai:uvadoc.uva.es:10324/671872025-09-11T08:59:29Zcom_10324_1170com_10324_931com_10324_894col_10324_1367

00925njm 22002777a 4500 dc Rey Hernández, Javier María author San José Alonso, Julio Francisco author Velasco Gómez, Eloy author Yousif, Charles author Rey Martínez, Francisco Javier author 2020 In this research paper, an analysis is developed on the performance of a hybrid ventilation system that combines Earth-to-Air Heat eXchangers (EAHX), free cooling and evaporative cooling Air Handling Unit Heat eXchanger (AHU-HX), all being controlled by a Building Management System (BMS) in a net Zero Energy Building (nZEB), called LUCIA. LUCIA nZEB is the first safe-building against Covid-19 in the world, certified by the international organisation WOSHIE, and located in Valladolid, Spain. The main aim is to optimize the performance of the three systems in such a way that the Indoor Air Quality (IAQ) levels remain within the allowable limits, while maximizing the use of natural resources and minimizing energy consumption and carbon emissions. The approach to satisfy the heating and cooling demand and IAQ levels through zero emissions energy systems is developed, thus anticipating the zero-energy target, set by the European Union for 2050. Results showed that the installed hybrid ventilation system uses heat exchangers for 70% of the operational time, in order to achieve the set parameters successfully. Also, the analysis made by monitoring data, have shown that the control and optimal operation of the hybrid ventilation system allows high energy recovery values with minimum additional electricity consumption. Significant reduction of carbon emissions and operational costs have been achieved. Building and Environment Volume 185, November 2020, 107265 0360-1323 https://uvadoc.uva.es/handle/10324/67187 10.1016/j.buildenv.2020.107265 1 185 (2020) 107265 12 Building and Environment 185 Producción científica Performance analysis of a hybrid ventilation system in a near zero energy building