In a parallel flow heat exchanger, hot fluid enters the heat exchanger at a temperature of 150°C and a mass flow rate of 3 kg/s. The cooling medium enters the heat exchanger at a temperature of 30°C with a mass flow rate of 0.5 kg/s and leaves at a temperature of 70°C. The specific heat capacities of the hot and cold fluids are 1150 J/kg·K and 4180 J/kg·K, respectively. The convection heat transfer coefficient on the inner and outer side of the tube is 300 W/m2·K and 800 W/m2·K, respectively. For a fouling factor of 0.0003 m2·K/W on the tube side and 0.0001 m2·K/W on the shell side, determine (a) the overall heat transfer coefficient, (b) the exit temperature of the hot fluid and (c) surface area of the heat exchanger.
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
In a parallel flow heat exchanger, hot fluid enters the
heat exchanger at a temperature of 150°C and a mass flow
rate of 3 kg/s. The cooling medium enters the heat exchanger
at a temperature of 30°C with a mass flow rate of 0.5 kg/s and
leaves at a temperature of 70°C. The specific heat capacities
of the hot and cold fluids are 1150 J/kg·K and 4180 J/kg·K,
respectively. The convection heat transfer coefficient on the
inner and outer side of the tube is 300 W/m2·K and 800 W/m2·K,
respectively. For a fouling factor of 0.0003 m2·K/W on
the tube side and 0.0001 m2·K/W on the shell side, determine
(a) the overall heat transfer coefficient, (b) the exit
temperature of the hot fluid and (c) surface area of the heat
exchanger.
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