Project work Robert Ussfeller (Civil Engineering)
Development and validation of application scenarios for FMI technology to integrate renewable energy sources into building energy simulations
Entwicklung und Validierung von Einsatzszenarien der FMI-Technologie zur Integration regenerativer Energiequellen in energetische Gebäudesimulation
Against the background of climate protection targets, rising energy prices and the requirements for a largely greenhouse gas-neutral heat and power supply, the importance of Renewable Energy Systems such as photovoltaics, solar thermal and PVT collectors is growing in the building sector. At the same time, the fluctuating availability of renewable energy sources and their integration into the overall building system place high demands on planning, design and evaluation. Against this background, the work investigates how models of Renewable Energy Systems can be coupled in a standardized way with an energetic building simulation and a system concept using FMI technology. The aim was to develop a methodical simulation approach, derive suitable model structures and evaluate the practical applicability of such a coupling.
Simplified representation of the modeled overall system
The first step was to work through the physical and modeling fundamentals of the technologies under consideration. This included photovoltaics, solar thermal collectors and photovoltaic-thermal collectors as well as the requirements for FMI-capable models. Based on this, suitable model approaches were selected and prepared for co-simulation. The models were created in OpenModelica, an open source environment for modeling and simulating physical systems using the Modelica modeling language.
Representation of the modeled overall system
The models were encapsulated as functional mock-up units and coupled with a building model FMU from SIM VICUS in the FMI CO simulation master MasterSim. Additional system components were also modeled, including a storage tank, heat pump and a simple control structure. The FMU exported from SIM VICUS maps the thermal behavior of the building and the heating transfer system as underfloor heating. In this way, a coupled building energy system was created on which both the behavior of individual components and the interaction in the overall system could be investigated. In addition to the physical modelling, the focus was on the interfaces, input and output variables as well as questions of parameterization and numerical robustness.
Supervision
The thesis was supervised by Dipl.-Ing. Dirk Weiß.
© Dirk Weiß
Research assistant
NameDipl.-Ing. Dirk Weiss
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