Question

If the by – pass factor is 0.30, what will be the efficiency of the cooling coil or the contact factor?

1. 0.30
2. 0.15
3. 0.66
4. 0.70

Answer 1

Correct Answer - Option 4 : 0.70

Concept: 

Bypass Factor represents the fractional part of total inlet air which is not in contact with the coil.

Bypass factor of a cooling coil is given by 

The efficiency of a cooling coil is given by ηcoil = 1 – BPF

Calculation:

Given:

BPF = 0.30

Now,

ηcoil = 1 – BPF

ηcoil = 1 – 0.3

∴ ηcoil = 0.7