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How to build current blower fan model in Flotherm |
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January 26, 2015, 03:49 |
How to build current blower fan model in Flotherm
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#1 |
New Member
Eric Lin
Join Date: Jun 2013
Posts: 1
Rep Power: 0 |
Method 1:Build fan housing geometry and create one fan (smart part) at fan outlet fan construction:rectangular fan and dedine non-linear fan curve
Method 2:Build fan housing geometry and create two fan (smart part) at fan inlet(top&buttom) fan construction:Axial fan and dedine non-linear fan curve Method 3:Build fan housing geometry and create recirculation devices fan construction one supply and two extract Question 1:Which way is best method for blower fan? Question 2:About P-Q curve, Why the fan outlet flow rate can't meet P-Q SPEC? such as SPEC Qmax=15 CFM, but fan outlet flow rate just only 12 CFM Question 3:When I use method 2, How do I define P-Q curve value for two fan? |
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January 27, 2015, 02:06 |
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#2 |
Member
Gabriel Ciobanu
Join Date: Jul 2011
Posts: 47
Rep Power: 15 |
hello,
this might be useful: http://webparts.mentor.com/flotherm/...arts/v6blower/ somehow it tells you to use "method 3" Best regards, Gabriel |
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November 24, 2020, 09:20 |
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#3 |
New Member
Nam Shaheb
Join Date: Nov 2020
Posts: 3
Rep Power: 5 |
Have you found the solution to your problem? I am also looking for help in this.
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January 2, 2021, 02:36 |
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#4 |
New Member
Hank Chung
Join Date: Oct 2016
Posts: 5
Rep Power: 9 |
Personally I prefer the method 3.
Both model 1 and 2 will calculate the pressure drop of the fan geometry, that is why the outlet flow rate is lower than P-Q curve. For model 3, you can define the P-Q same as the original one because recirculation device does not consider the geometry and pressure loss. |
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Tags |
blower, fan, recirculation |
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