Citation
Michael Wetter, Thierry Nouidui, David Lorenzetti, Edward A. Lee, Amir Roth. "Protyping the Next Generation EnergyPlus Simulation Engine". to appear in the Proceedings of the 14th International Conference of the International Building Performance Simulation Association (BS2015) (ed.), December, 2015.

Abstract
We describe the prototype of a next-generation implementation of EnergyPlus, DOE's whole-building energy simulation engine. This new implementation breaks EnergyPlus into a set of component models with clearly defined input and output ports. It instantiates these components and their connections from the EnergyPlus input file-thereby not disrupting applications that use EnergyPlus-and then simulates them using a discrete event simulator. This new structure should allow EnergyPlus to evolve more rapidly and robustly by decoupling component modules from the numerical solver. It also allows models to be exported for integration with building control systems. We prototyped this new implementation using the open-source Ptolemy II framework. We encapsulated the computing modules as Functional Mockup Units (FMUs) for Model Exchange. The system of equations defined by the connection of the FMUs is integrated using Quantized State System (QSS) simulation, a novel method that partitions systems of differential equations and integrates them asynchronously, using step sizes that are based on the time rate of change of the individual state variables. We present a numerical example that illustrates the asynchronous integration and numerical benchmarks of a multizone building model with a radiant slab. We compare the computing time among our prototype, EnergyPlus version 8.2 and the Dymola 2015 FD01 Modelica simulation engine.

Electronic downloads

• WetterEtAl_SOEP_BS_2015.pdf · application/x-octet-stream · 362 kbytes

• HTML

  Michael Wetter, Thierry Nouidui, David Lorenzetti, Edward A.
  Lee, Amir Roth. <a
  href="http://chess.eecs.berkeley.edu/pubs/1107.html"
  ><i>Protyping the Next Generation  EnergyPlus
  Simulation Engine</i></a>, to appear in the
  <i>Proceedings of the 14th International Conference of
  the International Building Performance Simulation
  Association (BS2015)</i> (ed.), December, 2015.

• Plain text

  Michael Wetter, Thierry Nouidui, David Lorenzetti, Edward A.
  Lee, Amir Roth. "Protyping the Next Generation 
  EnergyPlus Simulation Engine". to appear in the
  <i>Proceedings of the 14th International Conference of
  the International Building Performance Simulation
  Association (BS2015)</i> (ed.), December, 2015.

• BibTeX

  @proceedings{WetterNouiduiLorenzettiLeeRoth15_ProtypingNextGenerationEnergyPlusSimulationEngine,
      title = {Protyping the Next Generation  EnergyPlus
                Simulation Engine},
      editor = {to appear in the <i>Proceedings of the 14th
                International Conference of the International
                Building Performance Simulation Association
                (BS2015)</i>},
      month = {December},
      year = {2015},
      abstract = {We describe the prototype of a next-generation
                implementation of EnergyPlus, DOE's whole-building
                energy simulation engine. This new implementation
                breaks EnergyPlus into a set of component models
                with clearly defined input and output ports. It
                instantiates these components and their
                connections from the EnergyPlus input file-thereby
                not disrupting applications that use
                EnergyPlus-and then simulates them using a
                discrete event simulator. This new structure
                should allow EnergyPlus to evolve more rapidly and
                robustly by decoupling component modules from the
                numerical solver. It also allows models to be
                exported for integration with building control
                systems. We prototyped this new implementation
                using the open-source Ptolemy II framework. We
                encapsulated the computing modules as Functional
                Mockup Units (FMUs) for Model Exchange. The system
                of equations defined by the connection of the FMUs
                is integrated using Quantized State System (QSS)
                simulation, a novel method that partitions systems
                of differential equations and integrates them
                asynchronously, using step sizes that are based on
                the time rate of change of the individual state
                variables. We present a numerical example that
                illustrates the asynchronous integration and
                numerical benchmarks of a multizone building model
                with a radiant slab. We compare the computing time
                among our prototype, EnergyPlus version 8.2 and
                the Dymola 2015 FD01 Modelica simulation engine.},
      URL = {http://chess.eecs.berkeley.edu/pubs/1107.html}
  }
  

Posted by Mary Stewart on 20 Jul 2015.
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