What is a finned evaporator? - What is a finned evaporator?

Technical information Evaporators Finned-Tube Evaporators

Ribbed Tube Evaporators

Ribbed tube evaporators are made using Prime bare surface of the heat exchanger and installation of metal plates or fins to increase the surface area of heat exchange. A lot of air circulating across a bare-tube passes through a relatively large space between adjacent pipes. Hence, a large part of the air does not come in contact with the die surface of the heat exchanger. Air, who are not in contact with the coil does not give up its heat, so that its temperature does not change and it returns to the space unconditional. When the fins added bare-tube heat exchangers, they stretch in between the pipes, thus acting as a heat collectors. These fins secondary surface, which allow more air to come in contact with the cold evaporator. Fins transfer of thermal energy from the air masses that do not normally come into contact with the Prime surface. This design allows the evaporator to be made smaller, keeping at the same heat transfer large Prime the surface of the evaporator.

To be effective, the fins should be connected to the hose, in a manner that ensures good thermal conductivity is preserved throughout the life of the evaporator.

In some designs, the fins or soldered tack welded directly to the handset. In the majority of constructions, aluminium fins put on the end of the tube so that they are aligned in their correct position. Once they are all properly spaced, mandrels, have a stamp, which is slightly more than the inside diameter of the tube is pulled through a tube. Die extends from the pipe collars fins, establishing strict, mechanical coupling that allows excellent heat transfer throughout the life of the evaporator.

The distance between the plates diese evaporators varies depending on the intended application. Density from 1 to 14 fins per inch) is widely used in HVAC/R applications. For forced convection (fans) air circulation is used in applications in which the evaporator operates over 32 F (0C), fin density, usually around 7 fins per inch. Evaporators are designed to below freezing applications have fewer fins per inch. This strategy gives you more space between the ribs, to minimize the limitations of air circulation, which emerges as a frost forms on heat transfer surfaces. Similarly, in applications operating below zero temperatures with high hidden loads, fin density decreases to limit the formation of ice on the reels. Evaporator coils, intended for use in air-conditioning and other applications where operating temperatures are too high for the formation of frost on heat transfer surfaces can be and 14 fins per inch. The lower the density, the greater the amount of latent heat is removed from the air stream. It is important that the airflow resistance collapsed in natural convection evaporator applications. Thus, fin pitch is broader than that used in rolls using fans...

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