Advantages of Plate Heat Exchangers
Through scientific research and production practice, people have a deep understanding of the characteristics of plate heat exchangers, and summed up a series of advantages and disadvantages, usually compared with tube heat exchangers, which can be summarized as the following points:
The main advantage
1: High heat transfer coefficient
The structure of the shell and tube heat exchanger is good in terms of strength, but it is not ideal in terms of heat exchange, because when the fluid flows in the process, there are baffle-baffle and baffle-exchange Bypass between heat pipes and tube bundles. The fluid passing through these bypasses does not fully participate in heat exchange. In the plate heat exchanger, there is no bypass, and the corrugation of the plate can make the fluid turbulent at a small flow rate. Therefore, the plate heat exchanger has a higher heat transfer coefficient, which is generally 3 times that of the shell and tube heat exchanger.
2: Large logarithmic mean temperature difference
In the shell and tube heat exchanger, the two fluids flow in the shell side and the tube side respectively, which is generally a cross-flow flow mode. If further analysis, the shell side is a mixed flow, and the tube side is a multi-stream flow, so the logarithmic average temperature difference should use a correction factor. The correction coefficient is usually small - the flow of the fluid in the plate heat exchanger is generally co-current or counter-current, and the temperature difference correction coefficient is generally greater than 0.8, usually 0.95.
3: Small footprint
The plate heat exchanger has a compact structure, and the heat exchange surface in the unit body is 2 to 5 times that of the shell and tube heat exchanger. For the same heat exchange task, the floor area of the plate heat exchanger is about 1/5~1/10 of that of the tube heat exchanger.
4: Light weight
The thickness of the plate heat exchanger is only 0.6~0.8mm, and the thickness of the heat exchange tube of the tube heat exchanger is 2.0~2.5mm: the shell of the shell and tube heat exchanger is heavier than the frame of the plate heat exchanger. many. In the case of completing the same heat exchange task, the heat exchange area required by the plate heat exchanger is smaller than that of the tube heat exchanger.
5: low price
Under the premise of using the same material, because the frame requires less material, the production cost must be lower than that of the shell and tube heat exchanger.
6: The end temperature difference is small
In a shell and tube heat exchanger, the fluid flowing in the shell side and the heat exchange surface are staggered and flow around, and there is also a side flow, while the flow of the cold and hot fluids in the plate heat exchanger in the plate heat exchanger is parallel to the heat exchange. Moreover, there is no bypass flow, so that the temperature difference at the end of the plate heat exchanger is very small, and the heat exchange between water and water can be lower than 1 °C, while the tube heat exchanger is about 5 °C, which is very important for absorbing low-level heat energy. Very beneficial.
7: Low fouling coefficient
The fouling coefficient of the plate heat exchanger is much smaller than that of the tube heat exchanger. The reason is that the fluid is violently turbulent, and impurities should not be deposited: the flow dead zone of the channel between the plates is small: the heat exchange made of stainless steel is smooth and smooth. And less corrosion deposits, and easy to clean.
8: heat exchange of various media
If the plate heat exchanger is installed with intermediate baffles, one piece of equipment can conduct heat exchange of three or more media.
9: Easy to clean
After the pressing plate of the plate heat exchanger is removed, the plate bundle can be released, the plates can be removed, and mechanical cleaning can be performed.
10: It is easy to change the heat exchange surface or process combination
It is only necessary to increase (or decrease) the plates to achieve the heat exchange area that needs to be increased (or decreased).
Production Application
The company’s main business scope includes: central air-conditioning maintenance, cleaning and technical services; cooling tower and fan coil cleaning and maintenance services; custom processing of lithium bromide solution; sales of lithium bromide solution special impurity separators; central air-conditioning host and various zero Sales of accessories; installation and sales of central air conditioning systems, etc.
Widely used in major air-conditioning systems and process refrigeration cold and heat sources; in steel, textile, chemical, electronics, pharmaceutical, food and other industrial and mining enterprises, as well as hotels, theaters, hospitals, and large commercial buildings , Central heating stations and other occasions are widely used.
Contact Us
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