SHELL AND TUBE HEAT EXCHANGER
Shell and Tube Heat Exchanger is the most common type of heat exchanger in oil refineries and other large chemical processes, and is suited for higher-pressure applications. Shell Tubes Heat Exchanger are classified into fixed and Floating type Heat Exchangers . Fixed type Heat Exchangers are used where there are absolutely no chances for inter mixing of two fluids.
Shell and tube heat exchangers consist of a series of tubes. One set of these tubes contains the fluid that must be either heated or cooled. The second fluid runs over the tubes that are being heated or cooled so that it can either provide the heat or absorb the heat required.
In this type, the tube sheets are completely welded to the shell and acted as shell flanges. The Floating type Heat Exchangers has the advantages of removability of tube bundle and access for cleaning both inner and outer side of tubes and shell.
Applications :
Shell Tube Heat Exchanger is widely used in variety of application as a cooling solution. The most common amoung them is for cooling of Hydraulic Fluid and oil in engines, transmissions and hydraulic power packs. With the right coimbination of materials they can also be used to cool or heat other mediums, such as swimming pool water or charge air. One of the big advantages of using a shell and tube heat exchanger is that they are often easy to service, particularly with models where a floating tube bundle (where the tube plates are not welded to the outer shell) is available. Can also be used on fixed tube sheet heat exchangers
They are commonly used in
- space heating
- refrigeration
- air conditioning
- power plants
- chemical plants
- petrochemical plants
- petroleum refineries
- natural gas processing
- sewage treatment
U-Tube Heat Exchanger
In nuclear power plants called pressurized water reactors, large heat exchangers called steam generators are two-phase, shell and tube heat exchangers which typically have U-tubes. They are used to boil water recycled from a surface condenser into steam to drive a turbine to produce power. Most shell-and-tube heat exchangers are either 1, 2, or 4 pass designs on the tube side. This refers to the number of times the fluid in the tubes passes through the fluid in the shell. In a single pass heat exchanger, the fluid goes in one end of each tube and out the other.
Fixed Tube Sheet Heat Exchangers
In nuclear power plants called pressurized water reactors, large heat exchangers called steam generators are two-phase, shell and tube heat exchangers which typically have U-tubes. They are used to boil water recycled from a surface condenser into steam to drive a turbine to produce power. Most shell-and-tube heat exchangers are either 1, 2, or 4 pass designs on the tube side. This refers to the number of times the fluid in the tubes passes through the fluid in the shell. In a single pass heat exchanger, the fluid goes in one end of each tube and out the other.
Vertical Shell and Tube Heat Exchanger
Vertical Shell and Tube Heat Exchanger is a heat exchanger that is derived from its parent Shell and Tube Heat Exchanger and it is most commonly all Industries which involves higher-pressure and Higher Temperature applications.
Stainless Steel Shell and Tube Heat Exchanger
Stainless steel is used where both the properties of steel and fighting to corrosion are mandatory. Stainless steel differs from carbon steel by the amount of chromium present. Open to attack carbon steel rusts readily when exposed to air and moisture.