A two-shell passes and four-tube passes heat exchanger is used to heat glycerin from 20°C to 50°C by hot water, which enters the thin-walled 2-cmdiameter tubes at 80°C and leaves at 40°C. The total length of the tubes in the heat exchanger is 60 m. The convection heat transfer coefficient is 25 W/m2∙K on the glycerin (shell) side and 160 W/m2∙K on the water (tube) side. Determine the rate of heat transfer in the heat exchanger (a) before any fouling and (b) after fouling with a fouling factor of 0.0006 m2∙K/W occurs on the outer surfaces of the tubes.
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 two-shell passes and four-tube passes heat exchanger is used to heat
glycerin from 20°C to 50°C by hot water, which enters the thin-walled 2-cmdiameter
tubes at 80°C and leaves at 40°C. The total length
of the tubes in the heat exchanger is 60 m. The convection heat transfer
coefficient is 25 W/m2∙K on the glycerin (shell) side and 160 W/m2∙K
on the water (tube) side. Determine the rate of heat transfer in the heat
exchanger (a) before any fouling and (b) after fouling with a fouling factor of
0.0006 m2∙K/W occurs on the outer surfaces of the tubes.
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