A double-pipe heat exchanger operating in counter current mode is to heat a fluid(Cp 1.7 kJ/kg...

A double-pipe heat exchanger operating in counter current mode is to heat a
fluid(Cp 1.7 kJ/kg K) from 50°C to 95°C at a rate of 4.5 kg/s. The heating is to be
accomplished by hot fluid (Cp=1.97 kJ/kg K) available at 200°C at a mass flow
rate of 6 kg/s. The inner tube is thin-walled and has a diameter of 4 cm. If the
overall heat transfer coefficient of the heat exchanger is 680 W/m2
°C,
determine the length of the heat exchanger required to achieve the desired
heating.

Data given:

Plastic 0.4 W/mK
brick 0.72W/m°C
plaster 0.36 W/m°C
cement 1.4 W/m°C
Polyurethane foam 0.025W/m °C
Glass fiber/fiber glass 0.036 W/m °C
Air 0.0198 W/m °C
Copper 380W/m °C

# just take the required data that u need

Expert Solution

Amanda K answered 5 months ago

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