Abstract
This paper develops an energy analysis for an existing near Zero Energy (nZEB) and Zero Carbon Emissions building called LUCIA, located at the university campus in Valladolid (Spain). It is designed to supply electricity, cooling and heating needs through solar energy (Photovoltaic Systems, PV), biomass and an Earth–Air Heat Exchanger (EAHE), besides a Combined Heat Power (CHP). It is currently among the top three buildings with the highest LEED certification in the World. The building model is simulated with DesignBuilder version 5. The results of the energy analysis illustrate the heating, cooling and lighting consumptions expected, besides other demands and energy uses. From this data, we carried out an energy balance of the nZEB, which will help to plan preventive actions when compared to the actual energy consumptions, improving the management and control of both the building and its systems. The primary energy indicator obtained is 67 kWh/m2 a year, and 121 kWh/m2 a year for renewable energy generation, with respect to 55 kWh/m2 and 45 kWh/m2 set as reference in Europe. The Renewable Energy Ratio (RER) is 0.66. These indicators become a useful tool for the energy analysis of the nZEB according to the requirements in the European regulations and for its comparison with further nZEB.
Highlights
Buildings account for up to 40% of the energy consumption in the European Union (EU) [1,2]and are responsible for a large portion of the harmful emissions to the environment
The aim of this study was to analyse the energy performance of the building through the three energy indicators defined by the EPBD in order to obtain an energy balance and compare non-renewable and renewable energies
To carry out this analysis, a model of the LUCIA building has been simulated using DesignBuilder software version 5, using the Typical Meteorological Year (TMY) data provided by the Spanish Building Standard
Summary
Buildings account for up to 40% of the energy consumption in the European Union (EU) [1,2]and are responsible for a large portion of the harmful emissions to the environment. In Spain, order FOM/1635/2013 of 10 September updates the Spanish Building Standard on energy efficiency in buildings implementing both the EPBD and the Directive 2009/28/EC of the European Parliament and of the Council of 23 April 2009 on the promotion of the use of energy from renewable sources [3]. This standard establishes a first step leading to the objective of nZEB in
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