当前位置: > 媒体中心

联系恒兴业CONTACT US

客户服务热线:0757-82209610
电话:0757-82209610/82207109
传真:0757-82201032
联系人:招焯活
手机:13702907340
邮箱:369995615@qq.com
网站:http://www.fshxy.com

Brief introduction of plate heat exchanger

2013年9月5日 阅读:2063

Heat delivery by three methods:1, increasing the heat transfer coefficient;2, increasing the heat exchange area;3, increase the logarithmic mean temperature difference.

Increased logarithmic mean temperature difference, and the fluid flows through the heat exchanger and the conditions before and after the. In recent years, with the second law of thermodynamics analysis exchanger work know, to minimize heat exchanger, thus, not only can increase the logarithmic mean temperature difference, sometimes even managed to reduce the logarithmic mean temperature difference in order to reduce the over value, if blindly choose high logarithmic mean temperature difference, it is bound to lead to consumption increases substantially, this it is not advisable way.

Under the same conditions, the heat transfer area is increased, the heat exchange is increased. For a heat exchange system, from the point of economic effect, within limits, increasing the heat exchange area is good: but simply to increase the heat transfer area, and will cause the equipment volume is huge, the cost increased substantially. Therefore, increasing the heat exchange area, and sometimes the loss outweighs the gain., should balance its advantages and disadvantages.

Improve the equipment of heat transfer coefficient is always the research direction. In order to improve the heat transfer coefficient, must make the pipe and fluid heat transfer coefficient to match, can make the heat transfer coefficient increase substantially. In addition, lower heat transfer tube outer surface fouling degree, reduce the heat exchange tube wall thickness, so that heat transfer coefficient can be enhanced in varying degrees. While the tube inside and outside heat transfer coefficient and the dirt coefficient with heat exchange tube heat transfer surfaces have great relations, therefore increasing the heat transfer coefficient of the research is one of the direction of development, development of new efficient heat exchange element - corrugated heat exchange tube, it consists of the heat exchanger is referred to as the corrugated pipe heat exchanger. When working, the fluid contained in the bellows, the outer keep flow, the velocity of the fluid is constantly changing, forming of tube wall" scouring" role, therefore," tear" boundary layer, so that the heat exchange tube inner surface and the outer surface of the heat transfer have been significantly enhanced.

The corrugated pipe heat exchanger has the following main stay point:

High heat transfer coefficient

Because the fluid in the pipe and formation of fully strengthen the turbulence, so the heat transfer coefficient is greatly improved.

Anti fouling effect

As the fluid is continuously changed direction and" scouring" wall, so the deposition material is not easy to stay in the wall.

In addition, the components of the section is a billow profile shape, pressure capacity is greatly improved. So we can use a thin-wall stainless steel materials, anti-corrosion ability also greatly enhanced. At the same time as having a corrugated, corrugated" together with thermal expansion and contraction " action, make scale layer crack and fall off, along with the fluid" wash" and" clean" of the pipe wall. Therefore, the corrugated pipe heat exchanger is able to maintain a continuous and stable high efficient heat transfer performance.

In short, with a corrugated pipe as heat exchange element, achieve heat transfer enhancement. The corrugated pipe heat exchanger heat transfer coefficient than the original shell and tube type heat exchanger has been improved a lot, because the pipe wall is thin, the outer diameter and the diameter ratio of approximately 1.

The corrugated pipe heat exchanger and other types of heat exchanger of comparison

The corrugated pipe heat exchanger main components ( corrugated heat exchange tube ) heat transfer coefficient at the same Reynolds number is much higher than that of smooth tube, which illustrate the use of corrugated tube heat exchanger in heat exchange can be reduced under the same heat exchange area. Because the corrugated tube has high heat transfer coefficient, therefore it is not necessary to use a high velocity, which can reduce the resistance of corrugated tube heat exchanger, heat exchanger, reduce equipment investment, but also can reduce the operation cost of heat exchanger. The corrugated pipe heat exchanger and the heat transfer coefficient, at the same velocity of shell and tube heat exchanger, is more than two times. From the integrated effect, the corrugated pipe heat exchanger is superior to other types of heat exchangers.

分享到: