 |
 |
 |
|
|
|
[Sponsors] | ||||
March 8, 2016, 06:31
|
Exhaust and intake fan boundry conditions
|
#1 |
|
New Member
Ahmed
Join Date: Mar 2016
Posts: 3
Rep Power: 10  |
hello I am new here and am working on a project to design a ventilation system for parked cars and I have a problem with boundary conditions specially exhaust fan ( as outlet) and intake fan as (inlet).
I calculated the cooling load required for the car and from there I calculated the required flow rate...and chose a fan with that can provide me this flow rate...but I'm having a rough time to input the PRESSURE JUMP. in the fans specification table I only have a static pressure in inH2O...so how can I calculate the pressure jump (rise) from it... PLEASE HELP !!!....its urgent |
|
|
|
|
|
March 8, 2016, 06:33
|
|
#2 |
|
New Member
Ahmed
Join Date: Mar 2016
Posts: 3
Rep Power: 10 |
Excuse my English !!!
|
|
|
|
|
|
|
March 9, 2016, 10:39
|
|
#3 |
|
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,674
Rep Power: 66 |
Fans are spec'd in pressure rise at a given flowrate, so you can simply use that as your boundary condition.
Just convert your static pressure from inches of water to Pascals. The actual conversion factor varies depending on standard used but it's ~250. |
|
|
|
|
|
|
March 12, 2016, 18:10
|
|
#4 |
|
New Member
Ahmed
Join Date: Mar 2016
Posts: 3
Rep Power: 10 |
Well my fans specs are 133~187 CFM for a range 0.15~0.55 inH2O static pressure....when I tried that on a simple 2D pipe geometry with a fan in the middle then tried to calculate the flow rate from it putting the minimum static pressure of 0.15....but then I only got a 78 CFM...
That's why I didn't know what to do ...should I change the gauge pressure ? Or change the turbulence method ..am setting to turbulent intensity and length scale putting the intensity to 10% (high turbulence) and length scale as the diameter of the fan (0.172 m) Please help ! |
|
|
|
|
|
|
February 13, 2021, 09:03
|
boundary conditions for fan model
|
#5 |
|
New Member
ABHISHEK KUMAR
Join Date: Feb 2021
Posts: 2
Rep Power: 0 |
i have same problem to simulation fan boundary condition in 2 dimension
|
|
|
|
|
|
|
February 15, 2021, 02:27
|
|
#6 |
|
Member
Angel Penev
Join Date: Apr 2016
Location: Bulgaria
Posts: 47
Rep Power: 10 |
I suggest you to check our article which is very close to your problem. Regards and good luck!
 "Influence of buoyancy forces in multi-storey buildings on the efficiency of a regenerative air handling unit with heat recovery" https://iopscience.iop.org/article/1...2/1/012029/pdf |
|
|
|
|
|
 |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| moving mesh generation of combustion chamber with intake and exhaust valves | raghulvr | Main CFD Forum | 0 | October 10, 2015 07:29 |
| Intake and exhaust optimization | mururcont | FLUENT | 0 | July 4, 2013 16:07 |
| Modeling intake and exhaust in ICE | Alexvader | OpenFOAM | 2 | September 26, 2011 13:50 |
| negative or positive pressure jump at exhaust fan | Selo melo | FLUENT | 2 | March 28, 2007 22:23 |
| Intake and exhaust fan | Javier | FLUENT | 0 | June 21, 2006 17:53 |
Linear Mode
