Advantages and disadvantages of finned tube heat exchanger

Advantages and disadvantages of finned tube heat exchanger

Finned heat exchanger is mainly composed of three rows of side-by-side spiral finned tube bundles between the air flow direction, SRZ-type cooling finned tube bundles are processed by anti 0.5 * 10 mm steel strip with mechanical winding method, wound on 18 mm seamless steel tubes, and then hot-dip galvanised, stainless steel tubes and stainless steel bands can also be used to make all stainless steel radiators, and the SRL-type radiators are rolled with steel tubes and aluminium bands with finned radiators, which have more heat dissipating area per unit length than the SRZ-type. Its heat dissipation area per unit length is larger than that of SRZ type.

Advantages of finned tube heat exchanger

1. High heat transfer efficiency of finned tube heat exchanger The boundary layer is constantly broken due to the disturbance of the fins on the fluid, so it has a large heat transfer coefficient; at the same time, due to the spacer, the fins are very thin, with high thermal conductivity, so that the finned tube heat exchanger can achieve a high efficiency.

2. Compact finned tube heat exchanger As the finned tube heat exchanger has an extended secondary surface, so that its specific surface area can reach 1000 square metres / m3.

3. Finned tube heat exchanger is lightweight because it is compact and mostly made of aluminium alloy, now steel, copper, composite materials, etc. have also been mass produced.

4. Finned tube heat exchanger is highly adaptable Finned tube heat exchanger can be applied to: gas-gas, gas-liquid, liquid-liquid, all kinds of fluids between the heat transfer as well as the set of changes in the phase change heat. Through the arrangement and combination of flow paths, it can be adapted to different heat exchanging conditions, such as countercurrent, staggered flow, multi-flow, multi-process flow and so on. Through the series connection between units, parallel connection, series and parallel combination can meet the heat transfer needs of large-scale equipment. Industry can be stereotyped, mass production to reduce costs, through the building block combination to expand the interchangeability.

Although the finned tube heat exchanger has many advantages, but the finned tube heat exchanger manufacturing process requires strict process is complex. Easily clogged, corrosion-resistant, cleaning and maintenance is very difficult, so it can only be used for heat transfer medium clean, non-corrosive, not easy to scale, not easy to deposit, not easy to clog the occasion.

Finned tube heat exchanger heating temperature is insufficient for what reasons?

Finned tube heat exchanger is mainly composed of structure and plate. The plate is made of different materials made of thin plate with different ways of abrasives pressed into different shapes of corrugation, and in the four corners of the plate with corner holes for the media flow path. The periphery of the plate and the corner holes are sealed with rubber gaskets.

Finned tube heat exchanger is the plate in a stacked manner in the fixed compression plate, movable compression plate in the middle, and then clamped with the clamping bolt. In the use of the time will inevitably present a problem, the following let's take a look at the finned tube heat exchanger heating temperature lack of reasons:

1, parallel operation of multiple heat exchangers flow distribution is uneven.

2, heat exchanger scaling serious.

3, lack of medium flow on one side, resulting in a large temperature difference on the hot side, the pressure drop is small.

4, the cold side of the temperature is low, and cold, hot end temperature is low.