Curioustab Logo Curioustab
Home » Mechanical Engineering » Heat Transfer, Refrigeration and Air Conditioning

Cooling coil performance: effect of air velocity on by-pass factor As the face velocity of air through a cooling coil increases, how does the coil's by-pass factor typically change? Choose the correct trend.

Difficulty: Easy

Correct Answer: Increases with increase in air velocity

Explanation:

Given/Definitions
By-pass factor (BPF) quantifies the fraction of air that effectively "bypasses" ideal contact with the coil surface (i.e., leaves above apparatus dew-point).


Concept/Approach
Higher air velocity reduces contact time and reduces heat/mass transfer effectiveness, so a larger fraction of air leaves closer to the inlet state → higher BPF.


Therefore
BPF increases as air velocity increases.

← Previous Question Next Question→

More Questions from Heat Transfer, Refrigeration and Air Conditioning

Discussion & Comments

No comments yet. Be the first to comment!
Join Discussion