ASHRAE Duct Pressure Loss
ASHRAE Duct Pressure Loss
(OP)
I have a duct 600x600 by about 15m long with 6 branches each at 600x300.
According to ASHRAE calculations, at 3200 l/s the main duct has a pressure loss of 1Pa and the branch itself (500 l/s) has a pressure loss of 63Pa.
This is the first branch and the 63Pa is higher than the full index run (to the end of the 15m 600x600 duct and last grille).
Do I change things to make the branch the main index run or ignore the 63Pa and keep the main index run as being to the last grille?
According to ASHRAE calculations, at 3200 l/s the main duct has a pressure loss of 1Pa and the branch itself (500 l/s) has a pressure loss of 63Pa.
This is the first branch and the 63Pa is higher than the full index run (to the end of the 15m 600x600 duct and last grille).
Do I change things to make the branch the main index run or ignore the 63Pa and keep the main index run as being to the last grille?





RE: ASHRAE Duct Pressure Loss
How are you going to balance and regulate this duct?
B.E.
The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor
RE: ASHRAE Duct Pressure Loss
Branches will likely have VCD's or possibly stream splitter dampers.
RE: ASHRAE Duct Pressure Loss
RE: ASHRAE Duct Pressure Loss
You're not going to learn this on a web forum.
RE: ASHRAE Duct Pressure Loss
I think you need to seriously look at, either the size of the main run, and or the size of the branches. Or as Kiwi says you are going to find all of your air at the last register.
B.E.
The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor