The plate's design takes advantage of the film's high thermal conductivity. The ripple in the plate creates a unique flow channel that produces a strong disturbance flow at low velocities. This disturbance flow has a self-purification effect that prevents dirt from forming, leading to high heat transfer efficiency.
Generally speaking, the heat transfer coefficient of a plate heat exchanger, measured in K value, typically ranges from 3000 to 6000W/㎡. This means that a plate heat exchanger only requires 1/2 to 1/4 of the area of a shell and tube heat exchanger to achieve the same level of heat transfer.
The sealing device between the plates is designed with two seals and a signal hole. In case of any leakage, it can be discharged from the outside of the heat exchanger, preventing the mixing of two media and serving as a safety alarm.
By adjusting the number of heat exchanger plates or modifying the process, the desired heat transfer effect and capacity can be achieved as the heat exchanger plate is easy to disassemble. The heat exchange plate components can have a variety of special functions as long as the intermediate frame of the heat exchanger is wisely used. This allows the user to change the capacity, modify the heat transfer coefficient K value, or add new functions at any time.
Due to the almost complete countercurrent flow of the two media and the high heat transfer efficiency, the mini temperature difference between the two media in the plate heat exchanger can reach 1 ℃. The plate heat exchanger is an ideal equipment for recovering low-temperature waste heat or utilizing low-temperature heat sources.
The plate heat exchanger has a relatively compact structure, which occupies only 1/2 to 1/3 of the space required by tube and shell heat exchangers for equal heat transfer. Unlike shell-type heat exchangers, it does not require a larger space for pulling out the tube bundle during maintenance. Additionally, the plate heat exchanger only needs the clamping screw to be loosened to access and clean the surface of the heat exchange plate, making disassembly and assembly more convenient.
Under the condition of the same heat transfer coefficient, the resistance loss of plate heat exchanger can be controlled within 1/3 of the range of shell and tube heat exchanger through reasonable selection of flow rate.
