TRNEdit also serves as the editorfor manually generating stand-alone distributable TRNSYSsimulations called TRNSED applications. However, the TRNSYSenvironment still includes TRNEdit, a full-featured text editor forwriting and viewing TRNSYS input and output files and for runningparametric TRNSYS simulations.
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The addition of the Simulation Studio in the mid-1990sgreatly reduced the need for manual editing. Historically, the text-based TRNSYS input file was generatedmanually. TRNBuild is an interface for creating and editing all of thenon-geometry information required by the TRNSYS Building Model.TRNBuild allows the user extensive flexibility in editing wall andlayer material properties, creating ventilation and infiltrationprofiles, adding gains, defining radiant ceilings and floors, andpositioning occupants for comfort calculations. With the release of version 17, TRNSYS included TRNSYS3D – a pluginfor Google SketchUp™ that allows the user to draw multizonebuildings and import the geometry (including building self-shadingand internal view factors for radiation exchange) directly from thepowerful SketchUp interface into the TRNSYS Building environment(TRNBuild). Output devices also allow the user greatflexibility in integrating, printing, and reporting any componentoutput value. Users can watch the value of ANY system variable on an online plotas the simulation progresses (any temperature, flow rate, heattransfer etc.). The outputs ofone component are graphically connected to the inputs of another.Since its inception of in the mid 1990’s, the Simulation Studio hasreplaced the need to manually edit the text input file. The TRNSYS Simulation Studio serves as a robust, intuitive,graphical front end of the simulation, making the user’s job ofassembling a detailed system a simple endeavor – similar in natureto hooking up the pipes and wires in a real system. – Coupled Multizone Thermal/Airflow Modeling – Building Simulation (including LEED Energy Modeling) Because of the wide user-base,the tool’s long history, and its inherent flexibility, it isactively being used in many of the following applications: TRNSYS has an extensive cross section of users worldwide that spansfrom researchers to consultants, engineers to building simulationexperts, and students to architects. Models areconstructed in such a way that users can modify existing componentsor write their own, extending the capabilities of theenvironment.Īfter 35 years of commercial availability, TRNSYS continues to be aflexible, component-based software package that accommodates theever-changing needs of both researchers and practitioners in theenergy simulation community. Thestandard library includes approximately 150 models ranging frompumps to multizone buildings, wind turbines to electrolyzers,weather data processors to economics routines, and basic HVACequipment to cutting edge emerging technologies. The kernel also provides utilities that (among otherthings) determine thermophysical properties, invert matrices,perform linear regressions, and interpolate external data files.The second part of TRNSYS is an extensive library of components,each of which models the performance of one part of the system.
The first is an engine (calledthe kernel) that reads and processes the input file, iterativelysolves the system, determines convergence, and plots systemvariables. While the vast majority ofsimulations are focused on assessing the performance of thermal andelectrical energy systems, TRNSYS can equally well be used to modelother dynamic systems such as traffic flow, or biologicalprocesses. TRNSYS (pronounced ‘tran-sis’) is an extremelyflexible graphically based software environment used to simulatethe behavior of transient systems.