Simulation Speed Analysis and Improvements of Modelica Models for Building Energy Simulation

TitleSimulation Speed Analysis and Improvements of Modelica Models for Building Energy Simulation
Publication TypeJournal Article
Year of Publication2015
AuthorsJorissen, Filip, Michael Wetter, and Lieve Helsen
Abstract

This paper presents an approach for speeding up Modelica
models. Insight is provided into how Modelica models
are solved and what determines the tool’s computational
speed. Aspects such as algebraic loops, code efficiency
and integrator choice are discussed. This is illustrated
using simple building simulation examples and
Dymola. The generality of the work is in some cases
verified using OpenModelica. Using this approach, a
medium sized office building including building envelope,
heating ventilation and air conditioning (HVAC)
systems and control strategy can be simulated at a speed
five hundred times faster than real time.

LBNL Report Number

LBNL-1002904

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