By: Jason Maxwell
Submitted: 2012-01-08 22:35:56 | Word Count: 504
Various kinds of companies in the HVAC, chemical, process, along with petroleum
industries make use of shell and tube heat exchangers design, which is more typically known as the u-tube
[ advertisement ]
design, frequently.
With many different parallel tubes running into the shell, these units come into play when massive amounts
of fluids need heated or cooled. This unique design lends itself well primarily because of the significant heat transfer
area and its ability to provide a lot of efficiency in the heat transfer process.
You will find several types of shell and tube
heat exchangers, the type used is dependent upon the requirements of the process involved. They are able to continuously
provide transfer of heat using a quantity of passes of one of the fluids, or both of them. There are shell and tube heat exchangers design models which have been two pass and perhaps four
pass models that are standardized and customized models in multi-pass version.
Shell and
tube heat exchanger design models included in oil refineries along with other high-pressure applications
for instance chemical plants and even power plants of differing types, make use of this technology. Of these plants, the heat exchangers have fluids with different
type of temperatures flowing through the tubes as well as the shell. One of the liquids generally flows into the tubes, as well as the other outside the tubes but
within the shell around the tube bundle. Inside the shell, there are baffles used which help to keep the
fluids moving and reduce stagnation inside the shell part of the exchanger. The tube
bundle within one of these simple massive heat exchangers can be made of various types of tubes; tube
types could be longitudinally finned, and produced of many different corrosion resistant materials like
copper alloy and stainless steel.
Heat exchangers deliver the results by means of transferring heat from one of the
fluids to the other through the walls of the tubes, either from inside the tube to the shell side or the
other way around, with regards to the needs of the particular process.
Used with either gases or liquids in each one of the shell side and tube side, the
highest efficiency exchangers start using a large heat transfer area, which means that lots of tubes are
involved. This can help to also trap waste
heat and preserve resources. Many heat liquids to boiling and make use of the vapor for energy. Some other cool vapors and turn them into liquids; these are actually condensers.
Steam trains make use of exchangers, and power plants work with steam-driven
turbines joined with surface condensers in order to constantly recycle steam.
