1Assistant Professors, Department of Mechanical Engineering, Saranathan College of Engineering, Trichy, India
2UG Student, Department of Mechanical Engineering, Saranathan College of Engineering, Trichy, India
There is a large variety of heat exchangers available and used for different purposes in various fields. To efficiently increase the heat transfer between the hot fluid and cold fluid we introduced a change in the fluid flow profile of a heat exchanger which differs from other heat exchanger profiles. In this heat exchanger design, we decrease the heat exchanger length and increase the area of heat transfer by introducing a change in the fluid flow profile by making the flow helical along with the fins. Helical flow in the medium gives a higher convection, which results in efficient heat transfer between the media. The consequences of this profile are higher heat transfer coefficient per unit area and more efficient operation. Our design can be used as parallel, counter, cross, multi-pass type of heat exchangers. The helical flow also gives a selfcleaning effect. Therefore, when compared to the traditional shell-and-tube heat exchanger, the fouling of the heat transfer surfaces is considerably reduced and takes up much less space. This means that the double start screw type heat exchanger can remain in service far longer between cleaning intervals. The model is created in the PRO/E software and analyzed the temperature distribution in ANSYS FLUENT 14.5 version.
Double start screw, Self-cleaning effect, ANSYS FLUENT 14.5, Helical flow, less space requirement
