The lamella heat exchanger is an efficient, and compact in size, heat exchanger. The principle was originally developed
around 1930 by the company Ramens Patenter. Later Ramens Patenter was acquired by the company Rosenblads patenter
and the lamella heat exchanger was marketed under the Rosenblad name. In 1988 Berglunds acquired the product and we have
continued to develop the lamella heat exchanger to maximise customer benefits.
A lamella heat exchanger normally consists of a cylindrical shell surrounding a number of heat transferring lamellas.
The design can be compared to a tube heat exchanger but with the circular tubes replaced by thin and wide channels, lamellas.
Lamella bundle in
The lamella heat exchanger works with the media in full counter current flow
(see fig.2) without baffle plates,
which combined with the high turbulence (see fig.3)
around the lamellas, guarantees a high heat transfer rate. The absence of baffle plates minimises the pressure drop and makes handling of most media possible.
Since the lamella bundle easily can be dismantled from the shell, inspection and cleaning is easy.
Opposed from a tube heat exchanger, where the whole exchanger has to be replaced in case of damage, it is possible just
to replace the lamella battery and preserve the existing shell. All this contributes in giving the lamella heat exchanger a very favourable total cost of ownership.
Lamella battery dismantled from shell
Each lamella heat exchanger is designed specifically for the customers needs
by changing the heat exchanger diameter, length and the lamella configuration.
The material used is chosen based on the media. EN 1.4301 (AISI 304) or EN 1.4432 (AISI 316L) is most commonly used, but the heat exchanger can also be made in other material, for instance titanium or duplex stainless steel.
We have an extensive archive on deliveries made by Rosenblads Patenter and are therefore able to manufacture
complete replacement lamella heat exchangers as well as lamella batteries made to fit in existing shells of type RL and VR.