Cfd and Thermal Invistigation of Fin Tube Evaporator by Shape Optimyzation Process

Abstract

An evaporator is used in an air-conditioning system or refrigeration system to allow a compressed cooling chemical, such as Freon or R-22, to evaporate from liquid to gas while absorbing heat in the process. It can also be used to remove water or other liquids from mixtures. The process of evaporation is widely used to concentrate foods and chemicals as well as salvage solvents. In the concentration process, the goal of evaporation is to vaporize most of the water from a solution which contains the desired product.

In this thesis, different shapes of fins in fin tube evaporator are modeled in 3D modeling software Catia. The fins considered are continuous rectangular fin, interrupted rectangular fin, continuous circular fin, interrupted circular fin and tapered shaped fin. The mass flow rate and heat transfer rate are analyzed by CFD analysis done in Ansys.CFD analysis is done by varying fluids R600A, R32 on all the models.

The inputs of CFD analysis are velocity and pressure and the results determined are Pressure, Velocity, Mass Flow Rate, Heat Transfer Rate and Heat Transfer Coefficient.