A geometrically improved h-shaped finned tube

Abstract

The invention discloses a geometric improvement type H-shaped finned tube and a heat exchange tube bundle of the geometric improvement type H-shaped finned tube. The geometric improvement type H-shaped finned tube comprises a base tube and a plurality of fin sets, wherein the fin sets are arranged on the two sides of the base tube. Each fin set includes two fins, wherein the two fins are symmetrically connected with the outer wall of the base tube (1) through grooves close to the sides of the base tube. The plane where the fin sets are located is perpendicular to the axis of the base tube, theexternal profile of each fin set is rectangular, and the four corners of the exterior of each fin set are circular corners. The plane which includes the axis of the base tube and is perpendicular tothe smoke flowing direction serves as the interface and divides the fin sets into two parts, the upstream part serves as a windward side, the downstream part serves as a leeward side, gaps are reserved between the two fins of each fin set, the size of the gap on the windward side is smaller than that of the gap on the leeward side, and the area of the portions, on the windward side, of the fins ofeach fin set is larger than that of the portions, on the leeward side, of the fins of the fin set. According to the geometric improvement type H-shaped finned tube and the heat exchange tube bundle of the geometric improvement type H-shaped finned tube, the area of the windward side is larger than that of the leeward side, dust deposition and the wear risk of a heat exchanger can be remarkably reduced through the specific fin front-and-rear clearance ratio, the specific circular corner ratio and the specific aspect ratio, the flow resistance can be reduced as heat exchange can be remarkably enhanced through experiments and numerical simulation confirmation, and the efficiency and the economy of equipment operation are improved.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers for flue gas waste heat utilization, and is suitable for heat exchange equipment and heating equipment in industries such as energy, power, refrigeration, chemical industry, smelting, petroleum, etc., and specifically relates to a geometrically improved H-shaped finned tube. Background technique [0002] With the sustained and rapid development of my country's economy, the problem of energy supply shortage has become increasingly prominent, and energy conservation, emission reduction and consumption reduction have become the inevitable requirements of my country's economic and social development. As an important part of power, petroleum, chemical, refrigeration, metallurgy, and even aviation, rocket and other industrial processes, heat exchangers are of great significance for their safe and efficient operation. In various heat exchange equipment, increasing the heat exchange area through f...

AI Technical Summary

Problems solved by technology

[0006] Traditional H-shaped fins have their inherent disadvantages. For example, the four corners outside the fin group are at right angles, which will increase the flow resistance; Heat transfer deteriorates, reducing heat transfer efficiency; backflow phenomenon makes dust accumulation on the leeward side easy, and the low thermal conductivity of dust accumulation causes further deterioration of heat transfer

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