Heat Exchanger Tubes: Hot Extrusion VS Perforated

Structural features

1. Hot extrusion heat exchanger tube

Hot extrusion heat exchanger tubes are processed by extrusion and expansion on the shell, so that a large number of grooves and scales are generated between the inner and outer walls, increasing the inner and outer wall area ratio, thereby effectively improving the heat transfer capacity.

A large number of transverse wavy structures are formed between the inner and outer surfaces of the hot extrusion heat exchanger tube, which prolongs the time the fluid stays in the tube, thereby achieving a better heat transfer effect. The materials of hot extrusion heat exchanger tubes are usually aluminum alloy, brass and stainless steel. Their advantages are light weight, large heat exchange area and corrosion resistance. They are suitable for cold and frozen areas and production sites with relatively harsh chemicals.

2. Perforated heat exchanger tube

Perforated heat exchanger tubes, as the name suggests, are perforated on the outer surface of the tube, thereby increasing the inner and outer wall area ratio. The inner wall of the perforated heat exchanger tube is generally treated in different ways, such as concave, convex, diamond, flat, etc., so that the fluid generates strong turbulence in the tube, and forms an internal flow field with slow flow to the center and fast flow to the edge, weak pressure gradient and thin boundary layer, so as to achieve better heat transfer effect. Common materials for perforated heat exchanger tubes are stainless steel, copper, etc., which have the advantages of easy cleaning, no contamination of fluid, high temperature resistance, etc., except that their service life is slightly shorter.

Application field

1. Hot extrusion heat exchanger tube

Hot extrusion heat exchanger tube is suitable for many industrial sites, such as petrochemical, aerospace, casting and smelting, energy and other fields. Because this type of heat exchanger tube has the advantages of light weight and corrosion resistance, it is also widely used in automobiles, refrigeration, cooling, heat pumps, heat exchange and solar energy technology.

2. Perforated heat exchanger tube

Perforated heat exchanger tube has been widely used in the field of air coolers. Perforated heat exchanger tubes are small, light, compact, and evenly stressed. They have good aerodynamic characteristics, so they are also suitable for aircraft, computer heat dissipation, and electronic devices, and have extremely important application value.

Performance comparison

1. Heat transfer efficiency

The heat transfer coefficient of perforated heat exchanger tubes is better than that of hot extrusion heat exchanger tubes, but because the fluid flows inside them without a transverse wavy structure, the fluid flow condition is poor, so its actual heat transfer efficiency is lower; and hot extrusion heat exchanger tubes have different internal and external structures, chaotic internal flow patterns, and stronger heat dissipation capacity, so their heat transfer performance will be better under truly extreme conditions.

2. Other performance indicators

When customers purchase a heat exchanger of a certain material, they need to consider multiple performance indicators: such as pressure leakage, quality, high temperature deformation resistance, corrosion resistance, etc. The corrosion resistance of hot extrusion heat exchanger tubes is far better than that of perforated heat exchanger tubes; and perforated heat exchanger tubes are easier to produce due to their simple structure and simple manufacturing process.

Summary

In general, hot extruded heat exchanger tubes and perforated heat exchanger tubes have their own advantages and disadvantages. When customers choose the right heat exchange components, they need to understand the corresponding application scenarios in detail and make choices based on specific requirements.