Shell-and-tube heat exchanger
A shell-and-tube heat exchanger is a class of heat exchanger designs. It is the most common type of heat exchanger in oil refineries and other large chemical processes, and is suited for higher-pressure applications. As its name implies, this type of heat exchanger consists of a shell with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows over the tubes to transfer heat between the two fluids. The set of tubes is called a tube bundle, and may be composed of several types of tubes: plain, longitudinally finned, etc.
Shell and tube heat exchanger
Examples for tube bundles of shell-and-tube heat exchangers
Image: Tube bundle of a shell & tube heat exchanger (before assembly)
Image: Tube bundle of a shell & tube heat exchanger (before assembly) 2
A pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.
A welded steel pressure vessel constructed as a horizontal cylinder with domed ends. An access cover can be seen at one end, and a drain valve at the bottom centre.
Spherical gas container.
Picture of the bottom of an aerosol spray can.
Composite overwrapped pressure vessel with titanium liner.
