Chemical Engineering > GATE 2025 > Heat Exchangers
Water flowing at 70 kg/min is heated from 25°C to 65°C in a counter-flow double pipe heat exchanger using hot oil. The oil enters at 110°C and exits at 65°C. If the overall heat transfer coefficient is 300 W/(m2K), the heat exchanger area is ______ m2 (rounded off to 1 decimal place).
Specific heat of water and oil are 4.2 kJ/(kg°C) and 2 kJ/(kg°C), respectively.
Specific heat of water and oil are 4.2 kJ/(kg°C) and 2 kJ/(kg°C), respectively.
Correct : 14.0
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