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Novel efficient low-pressure-drop plate-fin type heat exchanger fin

A plate-fin heat exchanger with low pressure drop technology, applied in the field of fin structure, can solve the problems of small heat transfer coefficient and large flow channel pressure drop, achieve strong turbulent flow, reduce flow resistance, and improve heat transfer capacity Effect

Inactive Publication Date: 2014-08-20
TIANJIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Among them, the pressure drop of the straight fin form is small, but the heat transfer coefficient is also small because the fluid flow channel is straight; the heat transfer coefficient of the corrugated fin and the staggered serrated fin is relatively large, but because the flow channel is corrugated or The zigzag shape causes a large pressure drop in the flow channel

Method used

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  • Novel efficient low-pressure-drop plate-fin type heat exchanger fin
  • Novel efficient low-pressure-drop plate-fin type heat exchanger fin

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specific Embodiment

[0014] The fins are in the form of staggered corrugated fins, which are staggered in units of each unit wave, and each unit wave is divided into 6 segments by 5 cuts on average.

[0015] The wavelength of each unit wave is d 2 = 15 mm.

[0016] The amplitude of the unit wave is A=2.0mm.

[0017] The pitch of the fins is s=6mm.

[0018] fin thickness d 1 is 0.5mm; the height h of the fins is 9.5mm.

[0019] Compared with conventional continuous corrugated fins with the same fin thickness, height, unit wavelength, wave amplitude and pitch, this embodiment can increase the heat transfer coefficient by 15-25% under the same pressure drop condition, and the fin weight Reduced by more than 15%. Compared with conventional sawtooth fins with the same fin thickness, height, unit wavelength, amplitude and pitch, this embodiment can reduce the pressure drop by 10-20% and reduce the weight of the fins under the same heat transfer coefficient. More than 10%.

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Abstract

The invention discloses a novel efficient low-pressure-drop plate-fin type heat exchanger fin. The novel efficient low-pressure-drop plate-fin type heat exchanger fin comprises staggered corrugated fins, wherein the staggered corrugated fins are disconnected and staggered at the end portion of each unit wavelength; the interior of each unit wave is averaged into multiple sections through notches. The novel efficient low-pressure-drop plate-fin type heat exchanger fin has the advantages of having the advantages of staggered fins, corrugated fins and slotted fins at the same time, the degree of turbulence of fluid is stronger in the heat exchange process, a heat exchange boundary layer can be effectively destroyed, and consequently the heat exchange capacity of a heat exchanger is improved greatly. Meanwhile, due to gaps between the fins and the corrugated shape of the fins, flowing resistance of the fluid can be decreased, and the pressure drop in the heat exchange process is not too high.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a fin structure of the heat exchanger. Background technique [0002] The plate-fin heat exchanger is considered to be one of the most promising new heat exchange equipment because of its compact structure, light weight and high heat transfer efficiency. With the improvement of non-ferrous metal and stainless steel anti-corrosion treatment technology and brazing technology, it has been widely used in petrochemical, aviation, automobile manufacturing, power machinery, air separation equipment, deep and low temperature fields and other industrial sectors in recent years, especially in It is widely used in construction machinery industry. Although the heat transfer performance of the plate-fin heat exchanger has been recognized by people, people have never given up the pursuit of a heat exchanger with better heat transfer performance. In the process of people constantly loo...

Claims

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Application Information

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IPC IPC(8): F28F3/02
Inventor 李晓宁舒歌群李团兵田华贾琦
Owner TIANJIN UNIV
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