A small nuclear reactor is cooled by passing liquid sodium liquid sodium out of the reactor at 2 bar and 400 ° C. It is cooled to 320 ° C by passing through a heat exchanger before returning to the reactor. In the heat exchanger heat is transferred from the sodium to the water, which enters the exchanger at 100 bar and 49 ° C and exits at the same pressure as saturated steam. The mass flow of sodium is 10,000 kg / h, its specific heat is constant and is 1.25 kJ / kg "C and the pressure drop is negligible. Determine (a) the mass flow in kg / h of evaporated water. in the heat exchanger. and (b) the heat flux transferred between the two fluids in kJ / h Neglect the variations of kinetic and potential energy through it.
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.
A small nuclear reactor is cooled by passing liquid sodium liquid sodium out of the reactor at 2 bar and 400 ° C. It is cooled to 320 ° C by passing through a heat exchanger before returning to the reactor. In the heat exchanger heat is transferred from the sodium to the water, which enters the exchanger at 100 bar and 49 ° C and exits at the same pressure as saturated steam. The mass flow of sodium is 10,000 kg / h, its specific heat is constant and is 1.25 kJ / kg "C and the pressure drop is negligible. Determine (a) the mass flow in kg / h of evaporated water. in the heat exchanger. and (b) the heat flux transferred between the two fluids in kJ / h Neglect the variations of kinetic and potential energy through it.
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