Why fins are used in condenser?

1. Fins of different shapes can make the heat transfer wall rough, thereby destroying the static laminar boundary layer, increasing the convective heat transfer coefficient, and enhancing the heat transfer to varying degrees.
2. Under the condition of a certain load, the required area of the condenser can be greatly reduced.
3. According to the common sense of most people, rough finned tube surface is easy to cause fouling. But in fact, the turbulent flow caused by the rough surface destroys the static boundary layer, making it difficult for dirt to adhere. Even when dirt is attached, the dirt appears as discrete scales. The temperature change during the operation of the equipment will cause the tube to expand and contract, which will cause peeling due to the huge expansion difference between the dirt and the tube wall material, and will fall off automatically under the impact of the medium. And the scale layer of the light pipe is a cylinder without any self-detachment force. Therefore, the fouling of finned tubes is not much more serious than that of bare tubes.