Shell and Tube heat exchangers are the most commonly used type of heat exchangers in the process industry accounting to at least 60% of heat exchanger used. It can be designed to operate over a vibe range of temperatures and pressures using a wide range of materials widely used for most of the liquid-to-liquid and gas-to-liquid heat transfer applications (i.e. condensers, heaters, coolers, etc.)
GETS undertakes design, detailed engineering, manufacture, testing, certification and code stamping of Heat Exchangers to ASME Sec VIII Division 1, TEMA, API 660 & API 661.
The Fixed Tubesheet design consists of two stationary tubesheets attached to the shell. The bundles of straight tubes are connected between the tubesheets and contain baffles to direct the flow around the tubes in order to generate the required heat transfer. A head assembly is attached to each tubesheet. Some of its salient features are:
The U-tube design consists of straight length tubes bent into a U-shape with both ends terminating at the tubesheet. The tube bundle is fitted with supports or flow baffles. The tubesheet/tube bundle is placed in the shell and bolted between the head flange and body flange. A head assembly is required to direct the fluid into and out of the tube bundle. This configuration allows for the entire tube bundle to be removable. Salient features of these type of exchangers are :
A Floating Tubesheet design is similar to the Fixed Tubesheet design except one tubesheet is allowed to move axially within the shell while the other tubesheet is fixed. This configuration also allows for the tube bundle to be removable. Some of its salient features are:
Kettle reboilers are very simple and reliable. These are reliable in that they can handle high vaporization of up to 80 percent and are easy to maintain. The liquid from the bottom of the tower flows through the tube bundle and exits as condensate. A restraining device (baffle) controls the liquid level over the bundle. Some of its salient features are: