What is the difference between Shell and tube heat exchanger and plate heat exchanger?

- May 14, 2018-


Shell and tube heat exchanger and plate heat exchanger are both widely used. Although both of them have good cooling effects, there are many differences in their ease of manufacture and performance. So here today, the two are compared and the differences between the two are listed in detail.


The shell and tube heat exchanger series is a hot-selling product and has a wide range of applications in power, heating, chemical, machinery, metallurgy, marine, pharmaceutical, food and other industrial and civil applications. In the near future, some netizens communicated with the Vrcoolertech technicians about the differences between shell and tube heat exchanger and plate heat exchanger and reached the following conclusions. Vrcoolertech is here to share with you.


The plate heat exchanger is a new type of high efficiency heat exchange equipment made by stacking a series of metal sheets with a certain corrugated shape. A thin rectangular channel is formed between the various plates and the plate is then used for heat exchange. Compared with the conventional shell and tube heat exchanger, the plate heat exchanger has a much higher heat transfer coefficient than the latter in the same flow resistance and pump power consumption.


In the shell and tube heat exchanger the fluid flows in the tube and the shell and flows in cross-flow. Therefore, the logarithmic mean temperature difference correction coefficient is small; the plate cooler uses the cocurrent or countercurrent flow method, and the logarithmic average.The temperature difference is large, when the flow of cold and hot fluids in the plate cooler is parallel to the heat exchange surface and there is no sidestream, so that the temperature difference at the end of the plate cooler is small, and the heat exchange to the water can be lower than 1°C.


The use of shell and tube heat exchanger requires the maintenance of places where tube bundles are drawn out. However, plate coolers are compact and do not require any inspection sites. The heat transfer area per unit volume is higher than that of column tubes, so if you want to achieve the same The heat exchange capacity of the plate heat exchanger is higher than that of the plate type.


In order to achieve the purpose of increasing or decreasing the heat transfer area, the plate cooler only needs to increase or decrease several plates; in order to achieve the required flow combination, the arrangement of the plates can be changed or several plates can be replaced, but the tube cooling is The heat transfer area of the device cannot be arbitrarily changed.


The plate cooler plate thickness is thinner than the tube cooler, the former is 0.4 ~ 0.8mm, the latter is 2.0 ~ 2.5mm, the column tube shell is much heavier than the plate cooler frame, plate cooling The instrument is generally only about 1/5 of the tube coolers weight.


In the same heat exchange area, using the same material, the plate cooler price is about 40%~60% lower than the tube type. The heat transfer plate of the plate cooler adopts stamping processing, which has a high degree of standardization and can be produced in large quantities. However, the tube cooler is manufactured by hand and is obviously free of plate type.


Each of the two types of chiller equipment has its own advantages and disadvantages. In the actual selection process, you may wish to refer to the suggestions given by the manufacturer and combine the actual production requirements with the appropriate equipment.


From the above content, we can know that both cooling devices have advantages and disadvantages. The cooling modes of the two heat exchanger are completely different. You can choose products according to your own use.