Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Open-source photovoltaic model for early building planning processes: Modeling, application and validation

Laura Maier 1, Michael Kratz 1,2, Christian Vering 1, Philipp Mehrfeld 1, Dirk Müller 1
1 RWTH Aachen University, E.ON Energy Research Center, Institute for Energy Efficient Buildings and Indoor Climate, Aachen, Germany
2 currently studying at ETH, Zurich, Switzerland

Abstract: Over the last years, interconnected building energy systems (BES) have gained importance. In this context, photovoltaic (PV) systems play an important role as they enable local electricity generation. Their proper sizing is crucial for a sustainable and economically reasonable building operation. Here, simulation models can support practitioners to estimate electricity generation depending on PV plant design. However, there is still need for validated, modular and easy-to-use open-source PV models. We close this gap by developing an open-source Modelica model and validating it with measurement data. Results prove that the model accurately calculates DC power output. The estimation of Ohmic losses would even increase model accuracy. Yet, their integration raises model complexity, which is why they are neglected.
Keywords: Photovoltaic system model, Modelica, Interconnected Building Energy Systems, Validation
Pages: 2315 - 2316