plate heat exchanger of shell and tube heat exchanger

The comparison of plate heat exchanger of shell and tube heat exchanger titaniumcn
1. The high heat transfer coefficient due to the different corrugated plate upside down each other, constitute a complex flow, make the fluid in the corrugated plate revolved and three dimensional flow in the runner so high coefficient of heat transfer, is thought to be tube shell type 3 ~ 5 times.
2. The logarithmic mean temperature difference is big, the terminal temperature difference is small In tube and shell heat exchanger, two kinds of fluid flow in tube side and shell side, respectively, on the whole is wrong flow, logarithmic mean temperature difference correction coefficient is small, and the plate heat exchanger is more and flow or countercurrent flow mode, thus makes the plate heat exchanger at the end of the temperature difference is small, the water heat exchanger can be less than 1 ℃, shell and tube heat exchanger is usually 5 ℃.
3. The cover an area of an area small plate heat exchanger structure is compact, per unit volume of heat exchange area of the tube shell type 2 ~ 5 times, also don't like tube shell type want to reserve a spare tube bundle repair place.
4. Easy to change the heat transfer area or process combination.
5. Light weight of the plate heat exchanger plate thickness of only 0.4 ~ 0.8 mm, the thickness of heat exchange tube and tube heat exchanger is 2.0 ~ 2.5 mm, tube and shell of shell much heavier than the framework of plate heat exchanger, plate heat exchanger is generally about 1/5 of the weight of tube and shell.
6. Low price is the same material, under the same heat transfer area, prices of plate heat exchanger tube shell type low about 40% ~ 60%.
7. Convenient plate heat exchanger heat transfer plate is made by stamping processing, high degree of standardization, and can be mass production, usually use handmade tube heat exchanger.
8. Easy cleaning frame type plate heat exchanger as long as the loose hold-down bolts, can loosen the plate beam.
9. Only heat transfer plate shell heat loss small plate heat exchanger plate is exposed to the atmosphere, so the heat loss can be neglected, also do not need to heat preservation measures.Heat exchanger of shell and tube heat loss is big, need to heat insulation layer.
Small capacity of 10. Tube and shell heat exchanger is 10% ~ 20%.
11. The pressure loss of per unit length Due to the small gap between the heat transfer surface, heat transfer surface has concave and convex, therefore is bigger than traditional smooth pipe pressure loss.
12. Not easy to scale Due to internal fully turbulent, so not easy fouling, the fouling coefficient is only of tube and shell heat exchanger 1/3 ~ 1/10.
13. Shoulds not be too great work pressure, medium temperature is unfavorable and exorbitant, may let the cat out.
14. Easy jam Due to the plate between the channel is very narrow, usually only 2 ~ 5 mm, when the heat transfer medium containing larger particles or fiber material, easy to jam between channels.