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atwhaley / cfast

Automatically exported from code.google.com/p/cfast
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Pressure cut-off for fan systems does not work #1

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Mechanical vent into a room with not other vents
2. No fire needed
3. Use default values for fan cutoff pressure

What is the expected output? What do you see instead?
Flow through mechanical vent should go to zero at specified (default) 
upper pressure limit.  Instead, it does not stop.

Original issue reported on code.google.com by cfastdev@gmail.com on 13 Jun 2007 at 3:15

Attachments:

GoogleCodeExporter commented 9 years ago 
Fixed in revision 15.  Problem was in HVFAN where compartment pressure was not 
being 
followed correctly. Fix changed this to monitor pressure with two new variables 
in 
the cfast common block using interp to do the straight-line interpolation of 
the fan 
curve.

Existing sample input file now shows drop off of pressure as expected.

Original comment by cfastdev@gmail.com on 13 Jun 2007 at 3:45