Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Energetic self-sufficiency of a greenhouse residence: a dynamic techno-financial feasibility study

Charlotte Verhaeghe 1, Mateusz Bobier 1, Rik Berens 1, Amaryllis Audenaert 1, Stijn Verbeke 1,2
1 University of Antwerp, Belgium
2 VITO, unit Smart Energy and Built Environment, Belgium

Abstract: The dependency of current high energy performance buildings on external energy supply options can further be reduced by increasing the building's energetic selfsufficiency (ESS), up to the level of complete energy autonomy. A dynamic techno-financial analysis is carried out for different levels of ESS, up to the qualitative 100% ESS-level, for a greenhouse residence in Belgium. The energy demand, retrieved by means of dynamic whole building simulation, is to a large extent covered by on-site renewable energy sources (RES), combined with a capacity of electrical energy storage which are both sized using external scripts. The financial feasibility of the ESSvariants is evaluated for a variety of both static and dynamic pricing mechanisms under three economic cornerstone scenarios. The results indicate that increased (annual) ESS requires highly oversized on-site RES and energy storage options during most part of the year, thereby making the investment financially unattractive. The hypothesis that the techno-financial feasibility of various ESS-levels is highly dependent on the considered boundary conditions (e.g. end-use, time and spatial boundaries) is furthermore confirmed.
Keywords: Autonomous buildings, grid-interactive buildings, energy storage, dynamic technical and financial feasibility evaluation
Pages: 3005 - 3012