Paper Conference

Proceedings of BSA Conference 2015: Second Conference of IBPSA-Italy


Integrated design and dynamic simulation for a new zero energy building

Dama Alessandro, Angelotti Adriana, Penso Davide

Abstract: The European Directive 2010/31/EU on the energy performance of buildings introduces the nearly zeroenergy requirement, by 2020 and 2018 for new buildings in general and for public buildings respectively. This challenging target requires a complete assessment and optimization of the integration of efficient systems and renewable energy technologies in the building design. Dynamic energy simulation represents an essential tool in this regard. In this context, we present an integrated approach applied to the design of a new university building in Milan, in northern Italy. This case study consists of a four-storey building dedicated to offices, laboratories and classrooms. The building envelope design was formerly optimized, adopting passive strategies, like thermal insulation, solar control, daylighting and night natural ventilation, to reduce heating, cooling and lighting needs. In order to meet the net zero energy requirement, locally available renewable energy sources and energy efficient systems have to be taken into account. Therefore in this case dynamic energy simulations in EnergyPlus are used to compare different heating and cooling plants options. A reference plant consists of a condensing boiler and a chiller coupled to a cooling tower, and an alternative system is based on a Ground Source Heat Pump coupled to a vertical ground heat exchanger. A VAV distribution system is assumed. Finally, PV devices are integrated in the building roof. The simulation allows to choose the most efficient plant and to assess the overall strategy. Finally, the net zero energy target is tested and critically related to the different uses available in the building and to the climatic context.
Pages: 223 - 230