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Title: Performance analysis of a hybrid ventilation system in a near zero energy building
Authors: Rey Hernandez, Javier M.
San Jose-Alonso, Julio F.
Velasco-Gomez, Eloy
Yousif, Charles
Martinez, Francisco Javier Rey
Keywords: Force and energy
Heating and ventilation industry -- Management
Heat exchangers
Evaporative power
Issue Date: 2020
Publisher: Elsevier Ltd.
Citation: Rey-Hernández, J. M., San José-Alonso, F. J., Velasco-Gómez, E., Yousif, C., & Rey-Martínez, F. J. (2020). Performance analysis of a hybrid ventilation system in a near zero energy building. Building and Environment, 107265.
Abstract: In this research paper, an analysis is developed on the perfonnance 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, cenified 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 monito1ing data, have shown that the control and optimal operation of the hybrid ventilation system allows high energy recove1y values with minimum additional electricity consumption. Significant reduction of carbon emissions and operational costs have been achieved.
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