What are the advantages of plate heat exchanger compared with shell heat exchanger
Plate heat exchanger is a type of heat exchanger, is mainly composed of a series of corrugated metal sheet stacked into a new and efficient heat exchanger, each plate inside the instrument combined into a thin rectangular channel, so the heat exchange, so what is the principle of plate heat exchanger?What are the advantages of plate heat exchanger over shell heat exchanger?Let's see.
What are the principles of plate heat exchanger: structural principles
Structure of plate heat exchanger is the combination of structure, is to point to in a certain interval will be removable plate heat exchanger in the corrugated sheet stamping have passed the gasket seal is good, and with the unique framework and compression screw overlap to compaction, and four horns hole plate and gasket is the distribution of the fluid and gathering pipelines, can separate hot and cold fluid, reasonably through the plate heat exchanger.
What are the principles of plate heat exchanger two: working principles
The working principle of plate heat exchanger is to exchange heat through the plate, and the airflow in the work flows through the channel between the two plates.The intermediate partition plate separates the hot and cold fluid passing through the flow channel in turn and conducts heat exchange on the plate
Plate heat exchanger principle of these two, heat exchanger in addition to plate heat exchanger and shell heat exchanger, compared with this, there are many advantages, so more people choose, so what are the advantages:
1. High heat transfer coefficient
Plate heat exchanger is composed of different corrugated plates inverted each other into a flow channel, so the heat transfer coefficient of the fluid passing through the pipe is higher, three to five times that of shell type.
2. Large logarithmic average temperature difference and small terminal temperature difference
The fluid in shell and tube heat exchanger is cross-flow and the average temperature difference coefficient is small, while plate heat exchanger is parallel flow or counter-flow, so that the end temperature difference is small and the heat transfer to water can be less than 1℃.
3. Small floor space
Plate heat exchanger compact structure, the volume of the heat exchanger is 2 to 5 times the shell type, the floor area will be much smaller than the shell heat exchanger.
4. Easy to change heat exchange area or process combination
As long as a few plates are added or decreased, the heat transfer area can be changed accordingly, and the plate arrangement can be changed to recombine the process.
5. Light weight
Plate thickness is about 0.4-0.8mm, and shell thickness is about 2.0-2.5mm, so it is much lighter than.
6. Low price
Compared with two heat exchangers of the same material and the same heat exchange area, the plate type is about half as cheap as the shell type.
Summary: the above is about the principles of plate heat exchanger and tube and shell heat exchanger more advantages compared to the introduction, plate heat exchanger mechanism is very compact, the area is small, efficiency is better, so choose heat exchanger, or plate more advantages.