Paper Conference

Proceedings of eSim 2018: 10th Conference of IBPSA-Canada


A Study on the Trade-off between Energy Forecasting Accuracy and Computational Complexity in Lumped Parameter Building Energy Models

Carlos Andrade-Cabrera, Mattia De Rosa, Dimitrios-Stavros Kapetanakis, Anjukan Kathirgamanathan, Donal Finn

Abstract: The development of urban scale cost-optimal retrofit decision making requires the development of simplified building energy models which provide satisfactory energy prediction accuracy while remaining tractable when implemented at scale. Lumped parameter building energy models are computationally efficient representations of building thermal performance. The current paper introduces a user-led iterative model reduction methodology which identifies potential tradeoffs between model complexity (thus computational requirements) and energy estimation accuracy. Model complexity is progressively reduced using an energy performance criterion prior to model trimming. The methodology is applied to a building energy model of a mixed-use building, which is developed in the EnergyPlus Building Energy Model Simulation (BEMS) environment. The energy performance of the building is evaluated using a linear energy minimisation problem. The proposed methodology shows a potential reduction by half of the model complexity is possible, while retaining annual energy estimation errors below 10% for the target building.
Keywords: reduced order modelling, model order reduction, model calibration, energy estimation
Pages: 143 - 152