Study of Artificial Roughness in Condenser Tube used in Household Refrigerator: A Review

Enhancement techniques based on artificial roughness are used in numerous applications of condenser such as: the flow regime (Reynolds number), the fluid properties (Prandtl number), with and without fouling, the allowable pressure drop and the existence or absence of natural convection. The use of an enhancement technique may be conditioned by the specific application: for example, wire coils are not applicable in the food industry due to hygiene problems but corrugated and dimpled tubes are being used. In the petrochemical industry, the use of mechanically deformed tubes is not allowed for safety reasons. However, the use of wire coils does not present any problem. In boilers and heat recovery systems, wire coils are frequently used because of their easy removal for cleaning operations.