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new FS for (limited) HVAC ductwork analysis (ACCA Manual D)
joshtargo
Member Posts: 610 EDU
I'm planning the new ductwork for the house I'm rebuilding and wrote this to report exit velocity and total pressure loss for each "run". Pressure losses have a max allowable level depending on the air handler, and exit velocities should stay above 500 fpm for mixing, but below 700fpm for noise. The normalized debug plots show velocity in the positive dir and pressure loss in the negative. Real numbers available in the console.
Geometry inputs are just 3d points.
The script creates Polylines and eventually simple sweeps for duct diameter visualization.
Comments
Incredibly clever FS use. Love it
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Need to remember to fork this later for a water physics equivalent to help dial in our manifold sizes
Derek Van Allen | Engineering Consultant | MeddlerThanks! There's no reason it couldn't be a complete ductwork solver. This is restricted to the simple fittings i may use at the house. Might also make a Manual J, which calculates the heating and cooling load for a house.
@Derek_Van_Allen_BD This is the first working version and could probably be simplified/optimized. I'm sure there's more clever ways to do things. But non-geometry scripts like this are pretty tolerant to inefficiencies. the debugs and sweeps are the biggest overheads by far..