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

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
AuthorsFilip Jorissen, Michael Wetter, Lieve Helsen
Abstract

This paper presents an approach for speeding up Modelicamodels. Insight is provided into how Modelica modelsare solved and what determines the tool’s computationalspeed. Aspects such as algebraic loops, code efficiencyand integrator choice are discussed. This is illustratedusing simple building simulation examples andDymola. The generality of the work is in some casesverified using OpenModelica. Using this approach, amedium sized office building including building envelope,heating ventilation and air conditioning (HVAC)systems and control strategy can be simulated at a speedfive hundred times faster than real time.

LBNL Report Number

LBNL-1002904