Comparison of plate-fin & pipe fin heat exchanger

Plate-fin heat exchanger

The aluminum plate-fin heat exchanger is a novel heat exchanger using aluminum alloy corrugated fins as the heat transfer element. It has high heat transfer efficiency, compact structure, large adaptability, light weight, good economy, and can be designed into many The fluid has the characteristics of simultaneous heat exchange, and its unit volume heat transfer area can reach 1500m2/m3.

Mainly used as main heat exchanger, switching heat exchanger, condenser, evaporator, condensing evaporator, precooler, subcooler, liquefier, cooler, etc. Suitable for heat exchange occasions between gas-gas, gas-liquid and liquid-liquid.

There are many structural types of aluminum plate-fin heat exchangers, but the basic structure is the same, that is, a layer of channels is composed of corrugated fins, seals and baffles.

The second piece mainly plays the role of heat transfer, and the seal makes each layer of fins form a channel. The various flow channel forms depend on the arrangement of seals and fins. The partition is a thin sheet coated with brazing filler metal on both sides, which mainly serves as a partition.

Heat pipe heat exchanger

A tube is a kind of high heat element. The two ends of a metal tube are sealed, a proper amount of working fluid is injected into the tube, and a vacuum is formed to form a heat pipe. When the heat is small to heat one end, the working fluid absorbs heat and vaporizes. Under the action of the pressure difference, the steam flows to the other end at a high speed, releases latent heat to the cold source and condenses, and the condensed liquid returns from the cold source to the heat source. Heat is continuously transferred from the heat source to the cold source. The main forms are gravity heat pipes, separate heat pipes, and wick heat pipes. The heat pipe shell can be welded into spiral fins or longitudinal straight fins.

Heat pipe heat exchangers are divided into two types: integral type and separate type. The integral type heat pipe heat exchanger has a short transmission distance, but its structure is simple and easy to disassemble and assemble;

Separate heat pipe heat exchangers are suitable for long distances between cold and heat sources, and can be used to heat (or cool) multiple media at the same time, and the layout is relatively free.

In summary, the heat pipe has the following excellent performance

-Strong conveying capacity

--Good temperature uniformity

-Controllable heat flux and adjustable tube wall temperature

-Strong adaptability to the environment

-No additional auxiliary power equipment

-Simple structure and reliable work

It is precisely because of the above-mentioned excellent characteristics of heat pipes that heat pipes and heat pipe heat exchangers have been widely used in waste heat recovery, heating, uniform temperature, heat dissipation, and drying in electric power, metallurgy, petrochemical, glass ceramics, electronics, light industry and other industries.