Hello,
I am looking for the pressure drop or equivalent lengths in Tee fittings for two applications.
1. Two fluids with same flow rate enter into the In-line openings of a Tee fitting and leave together at the branch (T-elbow). The branch will have bigger diameter (14"
than two inlets (10".
2. One stream enters the branch side of Tee fitting and is distributed into the two smaller In-line sections of the Tee fittings.
As an approach to calculate pressure drop I found equivalent lengths of 21 for Tee as elbow and equivalent length of 7 for In-line Tee. Is the equivavent length of 21 applicable for our purpose described under note 1 and e.l. of 7 as per our note 2?
Another approach from Literature (VDI Wärmeatlas) is using formula: pressure drop= factor x density x velocity^2 /2, whereas factor for T-distributers is 2,87 for separation of one flow in two streams and 1,56 is used as factor for uniting two flows.
Third approach is a factor of appr. 0,9 for Tee fittings with separation of flows with 90° change in flow direction and appr. 0,35 for uniting two streams with 90° change in flow direction based on same formula.
Which approach seams to be the most suitable?
Best regards
Markus Lentz
I am looking for the pressure drop or equivalent lengths in Tee fittings for two applications.
1. Two fluids with same flow rate enter into the In-line openings of a Tee fitting and leave together at the branch (T-elbow). The branch will have bigger diameter (14"
than two inlets (10".2. One stream enters the branch side of Tee fitting and is distributed into the two smaller In-line sections of the Tee fittings.
As an approach to calculate pressure drop I found equivalent lengths of 21 for Tee as elbow and equivalent length of 7 for In-line Tee. Is the equivavent length of 21 applicable for our purpose described under note 1 and e.l. of 7 as per our note 2?
Another approach from Literature (VDI Wärmeatlas) is using formula: pressure drop= factor x density x velocity^2 /2, whereas factor for T-distributers is 2,87 for separation of one flow in two streams and 1,56 is used as factor for uniting two flows.
Third approach is a factor of appr. 0,9 for Tee fittings with separation of flows with 90° change in flow direction and appr. 0,35 for uniting two streams with 90° change in flow direction based on same formula.
Which approach seams to be the most suitable?
Best regards
Markus Lentz
