"helicoidally" - 1 õppematerjal

Study of heat transfer coefficient in helical coil

Heat transfer is a very common phenomenon in chemical engineering. Heat exchangers are one of the most common technological devices used in different areas of chemical industries. There are a large number of options available for the exchange of thermal power. The choice usually comes down to different factors, in which the heat exchanger must be performing. One of the most common heat exchangers structure is the tubular form. In the field of tubular 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