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Shading analysis using Ecotect software.pdf
- 1. Using ECOTECT for Exterior Qualitative Solar Analysis Direct Shading Analysis Harvard Graduate School of Design Diego Ibarra Digital Workshops Series Spring 2010
- 2. Quick overview of ECOTECT Examples of Quantitative Exterior Solar Analysis Examples of Qualitative Exterior Solar Analyses Direct Shading Method in ECOTECT Demo: Step by Step tutorial Diego Ibarra AGENDA
- 3. “Autodesk ECOTECT Analysis 2010 is a …. building design and environmental analysis tool that covers …. full range of simulation and analysis functions ….. It ….allows designers to work easily in 3D and apply all the tools necessary for an energy efficient and sustainable future.” Autodesk website. Author’s opinion: it is a very useful, mature and capable GUI (probably the best out there today), however it should not be used to perform quantitative analyses using its built-in engines (thermal or daylight) (Ibarra and Reinhart 2009). ECOTECT (Originally Square One Research (Andrew Marsh), recently bought by Autodesk) Diego Ibarra
- 4. You may download a FREE evaluation version of ECOTECT Analysis 2010 from the ‘autodesk’ website: http://students.autodesk.com/ SET - UP Follow the instructions outlined bellow to set-up your computer. Make sure to pay close attention to all the steps and execute them carefully. Autodesk requires you to provide some general information about yourself before you can download the evaluation version. Before the actual download begins you will be prompted to save the file to disk. The file you have downloaded is a zipped archive containing the ECOTECT installation files. Save the zip file to a temporary folder on your hard disk. Unzip it and double click on the file called ‘SETUP.EXE’. Follow the on-screen instructions. // ECOTECT // Diego Ibarra
- 5. OVERVIEW Simulation engines Graphical User Interface (GUI) RADIANCE / DAYSIM / EnergyPlus / others ECOTECT’s built-in engines ECOTECT as a GUI Diego Ibarra
- 6. version: 2/6/10 Simulation Engine vs. GUI Most building energy simulation programs come with a graphical user interface (GUI) as well as the actual simulation engine. The former is used to prepare simulation input files for the latter and to display simulation results once a simulation is complete. The developers of simulation engines and GUIs often work for different companies with the engine being developed at public organizations (government lab & universities) whereas GUIs are more often developed by commercial vendors. As a result there can be several GUIs for the same simulation engine. While the choice of GUI determines the ease of use if a simulation program, it is ultimately the engine that determines how reliable simulation results are. A great GUI with a weak engine cannot yield reliable results! OVERVIEW Diego Ibarra
- 7. Quantitative Exterior Solar Analyses Examples Even when carrying out simple quantitative exterior solar analysis you should be very careful and critic about the results. ECOTECT’s Irradiation distribution method has not been validated (Comparison study in progress, Ibarra and Reinhart 2010?). Following are a series of this kind of analyses. Diego Ibarra
- 8. Quantitative Solar Analyses Examples Total Sunlight Hours Diego Ibarra
- 9. Quantitative Solar Analyses Examples Total Solar Radiation (Wh/m2) Diego Ibarra
- 10. Quantitative Solar Analyses Examples Total Solar Radiation (Wh/m2) Diego Ibarra
- 11. Quantitative Solar Analyses Examples Visibility Access (m2) Diego Ibarra
- 12. Qualitative Exterior Solar Analyses Overview Exterior qualitative solar analyses use simple geometric derived sun positions to directly trace solar rays. They do not take into account solar radiation or sky distribution methods. Diego Ibarra
- 13. As in other building performance analyses we also have a GUI and a an engine (code). However, in this case for simple qualitative shading studies we only relay un simple geometric derivations (Within ECOTECT) OVERVIEW Simple engine (geometric derivations using project latitude) Graphical User Interface Built-in Geometric Models Diego Ibarra
- 14. Qualitative Analysis Solar positions Diego Ibarra
- 15. Direct Shading Qualitative Analysis Diego Ibarra
- 16. Shadow range Qualitative Analysis Diego Ibarra
- 17. Fancy Shadow range Qualitative Analysis Diego Ibarra
- 18. Solar Ray-tracing 21 October 3pm No overhang Bottom overhang Overhangs + no sill No sill No overhang Qualitative Analysis Diego Ibarra
- 19. Solar Ray-tracing Qualitative Analysis Diego Ibarra
- 20. Shading profiles Solar envelopes Overshadowing Solar envelopes Overshadowing Custom shadow range Qualitative Analysis Diego Ibarra
- 21. ECOTECT interface Visualization and settings Shadows and shadow range Ray-tracing and solar envelopes DEMO Tutorial Diego Ibarra
- 22. Go to “nettemp” on the GSD network and copy to your desktop a folder named “Direct_Shading_Spr2010” DEMO Tutorial Diego Ibarra
- 23. In the next few slides you will find a step-by-step example of what will cover in this tutorial… DEMO Tutorial Diego Ibarra
- 39. Questions… dibarra@gsd.harvard.edu Digital Workshops Series Spring 2010 * Working document. Please visit the G(SD)2 website for future revisions. Diego Ibarra, M.Arch, MDesS, LEED AP BD+C. Doctoral Student, Sustainable Design, Harvard University.