Views: 25 Author: Site Editor Publish Time: 2023-07-28 Origin: Site
Plate heat exchangers were first put into commercial production in the 1930s and are now being used more and more widely in water supply, heating, and air conditioning projects in industrial and civil buildings. The correct selection of plate heat exchangers can ensure the smooth implementation and use of the project. Here we introduce how to select the heat exchanger.
Material of construction
Blocking tendency
Maintence
Pressure Drop
Because compared with the tube or other heat exchanger's heat surface, plate heat exchanger heat exchange surface is quite a book, only 0.5 mm, corrosion allowance is basically meaningless. The maximum corrosion rate allowed is 0.05mm/a. The heat exchange surface of a plate heat exchanger sometimes requires the use of alloy materials. However, except for the occasional use of high-strength alloy materials, thin plates and high heat exchange rates in plate heat exchangers mean that the heat exchanger is less expensive.
Blocking is a common phenomenon encountered in heat exchangers. Blockage occurs when a low thermal conductivity material is formed on the surface of the heat exchanger. The heat exchange rate decreases because the resistance factor is added to the heat exchange system fraction. Also, the pressure drop increases when the number of flowable interface paths is reduced. The plate heat exchanger is less likely to be blocked. Because of the uniform media distribution, high turbulence, and smooth surface of the plate. The use of highly corrosion-resistant materials for the plates also reduces blockages.
The plate heat exchanger has certain advantages in terms of maintenance. It is easy to detect blockage and corrosion, easy to clean chemically and mechanically, and easy to repair. The heat exchange capacity can also be expanded by increasing the number of plates, provided the frame and interface are suitable. The bolted structure of the plate heat exchanger can be increased by increasing the length of the load-bearing rod to meet the requirements of alternative operating conditions. Plate heat exchangers can be used for other applications as long as the plates and gaskets are suitable for the new process fluid.
Pressure drop plays an important role in the design of a wrench heat exchanger. Due to the high cost of the pump and the limitations of the process, the pressure drop is somewhat limited. Therefore, it is very important to effectively utilize the total pressure drop generated on the plate heat exchanger, where the plate pressure drop loss occurs near the holes and in the channels. If a multi-flow system is used, the pressure drop increases considerably, therefore, it is recommended to use a single-flow system whenever possible to achieve good heat exchange results. The pressure drop generated in the channel is due to the friction between the medium flow and the plate and increases with the flow rate in the channel. In general, the pressure is proportional to the square of the channel flow rate.
These are just a few of the indicators to look for during the selection of a heat exchanger. If you have a need for a plate heat exchanger, you can pay attention to Shanghai Jiangxing Chemical Equipment Co. Ltd, which has been developing heat exchangers for decades and must have the style you need.
