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What is the By-pass factor for cooling coil, if td1 = 49°C, td2 = 36°C and td3 = 30°C?

What is the By-pass factor for cooling coil, if td1 = 49°C, td2 = 36°C and td3 = 30°C? Correct Answer 0.315

By-pass factor is the amount of air by-passed in the process. So, for the cooling coil, BPF = Temperature difference between exit and coil / Temperature difference between entry and coil = td2 – td3 / td1 – td3 = 36 – 30 / 49 – 30 = 0.315.

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