Thanks HVACBoston
I agree with you that the open chamber shall be treated as a plenum and SR1-1 coefficient can be used for the loss from the chamber to the narrow passages.
But I can't find anything on duct---> plenum in my ASHRAE copy. Would ER4-1 be a close one?
Can it be treated as a...
I have looked into the minor loss coefficient of ASHRAE booklet (miss pages), unfortunately I couldn't find anything on an open chamber pressure loss (see attached drawing).
Only one fan would operate at one time and the flow will diverge into two. I understand that to analyze the pressure...