A MODULAR BUILDING CONTROLS VIRTUAL TEST BED FOR THE INTEGRATION OF HETEROGENEOUS SYSTEMS
Michael Wetter, Philip Haves
This paper describes the Building Controls Virtual Test Bed (BCVTB) that is currently under development at Lawrence Berkeley National Laboratory. An earlier pro- totype linked EnergyPlus with controls hardware through embedded SPARK models and demonstrated its value in more cost-effective envelope design and improved con- trols sequences for the San Francisco Federal Building. The BCVTB presented here is a more modular design based on a middleware that we built using Ptolemy II, a modular software environment for design and analysis of heterogeneous systems. Ptolemy II provides a graph- ical model building environment, synchronizes the ex- changed data and visualizes the system evolution during run-time. Our additions to Ptolemy II allow users to cou- ple to Ptolemy II a prototype version of EnergyPlus,MAT- LAB/Simulink or other simulation programs for data ex- change during run-time. In future work we will also im- plement a BACnet interface that allows coupling BACnet compliant building automation systems to Ptolemy II. We will present the architecture of the BCVTB and ex- plain how users can add their own simulation programs to the BCVTB.We will then present an example application in which the building envelope and the HVAC system was simulated in EnergyPlus, the supervisory control logic was simulated inMATLAB/Simulink and Ptolemy II was used to exchange data during run-time and to provide real- time visualization as the simulation progresses.
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