The following represents a parallel heat exchanger which contains 130 tubes each with a diameter of 48mm and 1.6 m long with thin walls of steel. Investigate how much hot water can be produced and how much hot gas will be needed. Using the data below determine the flow rate of water and gas for parallel and contra flow configurations and compare them. The water needs to be heated from 15oC to 95 oC The surface heat transfer coefficient for the water = 1500 W/m2 K The specific heat capacity of the water is 4.19 kJ/kg K. The gas temperature at inlet = 350oC and may be cooled to 120oC The surface heat transfer coefficient for the gas = 300 W/m2 K Mean specific heat of the gasses cp = 1.13 kJ/kg K. The wall is thin so the temperature drop due to conduction is negligible.
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.
PART 4
The following represents a parallel heat exchanger which contains 130 tubes each with a diameter of 48mm
and 1.6 m long with thin walls of steel.
Investigate how much hot water can be produced and how much hot gas will be needed.
Using the data below determine the flow rate of water and gas for parallel and contra flow configurations
and compare them.
The water needs to be heated from 15oC to 95 oC
The surface heat transfer coefficient for the water = 1500 W/m2 K
The specific heat capacity of the water is 4.19 kJ/kg K.
The gas temperature at inlet = 350oC and may be cooled to 120oC
The surface heat transfer coefficient for the gas = 300 W/m2 K
Mean specific heat of the gasses cp = 1.13 kJ/kg K.
The wall is thin so the temperature drop due to conduction is negligible.
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