TYPES OF SHELL CONSTRUCTIONS
TEMA-E: This shell is the most common shell type, as it is most suitable for most industrial process cooling applications.
TEMA-F: This shell design provides for a longitudinal flow plate to be installed inside the tube bundle assembly. This plate causes the shell fluid to travel down one half of the tube bundle, then down the other half, in effect producing a counter-current flow pattern which is best for heat transfer.
TEMA-G and H: These shells are most suitable for phase change applications where the bypass around the longitudinal plate and counter-current flow is less important than even flow distribution.
TEMA-J: This shell is specified for phase change duties where significantly reduced shell side pressure drops are required. They are commonly used in stacked sets with the single nozzles used as the inlet and outlet. A special type of J-shell is used for flooded evaporation of shell side fluids.
TEMA-K: This shell, also termed as “kettle reboiler”, is specified when the shell side stream will undergo vaporization. The liquid level of a K shell design should just cover the tube bundle, which fills the smaller diameter end of the shell. This liquid level is controlled by the liquid flowing over a weir at the far end of the entrance nozzle.TEMA-X: This shell, or cross flow shell is most commonly used in vapor condensing applications, though it can also be used effectively in low pressure gas cooling or heating. It produces a very low shell side pressure drop, and is therefore most suitable for vacuum service condensing