In an open heart surgery under hypothermic conditions, the patient’s blood is cooled before the surgery and rewarmed afterwards. It is proposed that a concentric tube counterflow heat exchanger of length 0.5 m is to be used for this purpose, with a thin walled inner tube having a diameter of 55mm. If water at 60 ⁰C and 0.1kg/s is used to heat blood entering heat exchanger at 18 ⁰C and 0.05 kg/s. What is temperature of the blood leaving the heat exchanger? Uo= 500 W/m^2.K, Cpblood=3.5kJ/kg-K, Cpwater=4.183 kJ/kg-K.
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 an open heart surgery under hypothermic conditions, the patient’s blood is cooled
before the surgery and rewarmed afterwards. It is proposed that a concentric tube counterflow heat exchanger of length 0.5 m is to be used for this purpose, with a thin walled inner tube having a diameter of 55mm. If water at 60 ⁰C and 0.1kg/s is used to heat blood entering heat exchanger at 18 ⁰C and 0.05 kg/s. What is temperature of the blood leaving the heat exchanger? Uo= 500 W/m^2.K, Cpblood=3.5kJ/kg-K, Cpwater=4.183 kJ/kg-K.
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