Paper Conference

Proceedings of Building Simulation 2017: 15th Conference of IBPSA


Flexibility Quantification for Building Energy Systems with Heat Pumps

Sebastian Stinner, Kristian Huchtemann, Dirk Mu¨ller
E.ON Energy Research Center, Institute for Energy Efficient Buildings and Indoor Climate RWTH Aachen University, Aachen, Germany

Abstract: Building energy systems (BES) are meant to become a potential flexibility resource for the electrical energy system in the future. In literature, different approaches for flexibility quantification are presented. Each of these approaches either uses specific input data (like price signals), simplifications in the calculation (e.g. constant COP of heat pumps(HP)) and/or does not account for the aggregation of flexibility. To identify the characteristic behavior of the HP systems, building performance simulations in Modelica are performed in this paper. The power flexibility is mostly influenced by the HP size and the domestic hot water (DHW) share. However, the energy flexibility is influenced by thermal energy storage (TES) size, minimum supply temperature and the ratio of TES losses to DHW demand. It can be concluded that the proposed method can be used to compare BES flexibility to other flexibility options on an aggregated level.
Pages: 930 - 939