Turning vanes in large rectangular elbows primarily reduce which quantity compared with a hard mitered turn?
Choices
- (A) Filter MERV of outdoor air
- (B) Turbulent losses / pressure drop in the turn (lower ESP segment loss)
- (C) Chiller kW/ton of refrigerant
- (D) Transformer primary voltage
Correct answer: (B)
Turbulent losses / pressure drop in the turn (lower ESP segment loss)
Explanation
Fittings + vanes: static regain / lower loss; SMACNA loss coefficients.