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In a condenser of a power plant, the steam condenses at a temperature of 60°C. The cooling water enters at 30°C and leaves at 45°C. The Logarithmic Mean Temperature Difference (LMTD) of the condenser is
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- 16.2°C
- 21.6°C
- 30°C
- 37.5*C
Correct Option: B
Flow configuration in condenser as shown below. 
ΔT1 = 30°C (Q1)
ΔT2 = 15°C (Q2)
| LMTD = | = | ||||||||
| In |  |  | In | | | ||||
| ΔT2 | 15 | ||||||||
= 21.6°C
