In a counter-current-flow tubular heat exchanger, a liquid food (milk), flowing in the inner pipe, is heated from 20 to 40°C. In the outer pipe the heating medium (water) cools from 90 to 50°C. The overall heat-transfer coefficient based on the inside diameter is 2000 W/(m^2-°C). The inside diameter is 5 cm and length of the heat exchanger is 10 m. The average specific heat of water is 4.181 kJ/(kg-°C). Calculate the mass flow rate of water in the outer pipe. Compare the amount of milk being heated to concurrent design.
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.
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In a counter-current-flow tubular heat exchanger, a liquid food (milk),
flowing in the inner pipe, is heated from 20 to 40°C. In the
outer pipe the heating medium (water) cools from 90 to
50°C. The overall heat-transfer coefficient based on the inside
diameter is 2000 W/(m^2-°C). The inside diameter is 5 cm and
length of the heat exchanger is 10 m. The average specific heat
of water is 4.181 kJ/(kg-°C). Calculate the mass flow rate of
water in the outer pipe. Compare the amount of milk being heated to concurrent design.
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