Openstudio 2.9.1 File
Date: [Current Date] Subject: Evaluation and Feature Summary of OpenStudio 2.9.1 Application: Building Energy Modeling (BEM), EnergyPlus Simulation Management
| User Type | Action | Rationale | |---------------|------------|----------------| | Using OpenStudio 2.8.x or earlier | Upgrade recommended | Gains EnergyPlus 9.3 features (e.g., improved heat pump modeling, district cooling templates). | | Using OpenStudio 2.9.0 | Upgrade highly recommended | Resolves several critical stability and scripting bugs. | | Using OpenStudio 2.9.1 without issues | No immediate need | Stable; upgrade only if new features in 2.9.2+ (future release) are needed. |
When using 2.9.1 compared to modern versions (3.x+), be aware of the following: openstudio 2.9.1
| ID (approx) | Description | Impact |
|-------------|-------------|--------|
| #4231 | Crash when copying HVAC systems with setpoint managers | High |
| #4257 | Incorrect reporting of unmet hours in AnnualBuildingEnergyPerformance | Medium |
| #4289 | Radiance measure failing on Linux due to file path separators | Medium |
| #4302 | OS:Coil:Cooling:DX:VariableSpeed missing performance curves in forward translation | High |
| #4325 | SketchUp plugin undo operation corrupting space loads | Medium |
All these issues were resolved in 2.9.1. Date: [Current Date] Subject: Evaluation and Feature Summary
To get the most out of this version, follow these expert tips:
Problem: Drawing complex shading surfaces (e.g., a neighboring tower with 200+ faces) causes the SketchUp plug-in to become sluggish. Workaround: Draw simplified massing boxes using native SketchUp geometry, then explode and use "Create Shading Surface Group" only on the outermost envelope. | ID (approx) | Description | Impact |
Version 2.9.1 introduced improved default templates for:
The HVAC Systems tab in the OpenStudio interface became noticeably more responsive, allowing modelers to drag and connect components (coils, fans, zones) without crashing—a frequent complaint in earlier 2.7.x builds.