Study of heat transfer coefficient in helical coil
heat exchangers, one way is to bend the tube helicoidally, which makes the tube a lot more
compact and less expensive, because less material is needed to jacket the tube. Due to the
increased number of turns of the helix, additional turbulence is generated inside the tube and
therefore the heat transfer coefficient of the helical coil is larger that of the corresponding
straight tube. In chemical industries there are many applications, which use coils as heat
exchangers such as in small nonindustrial boiler systems where water is heated up or steam is
generated inside the helical coil by direct heating via burning fuel such as diesel oil or other
burning materials. Polyethylene is also manufactured inside helical coils, where oxidation of
ethylene takes place. The heat from this exothermic reaction is taken away by cooling water
circulating around the helical coils. In many industrial applications helical coils are used to
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