FIFFI type radiation recuperators are the result of a long experience both related to their study and their operation.
In these recuperators, the heat transfer between the primary and secondary fluids is done by radiation.
They consist on a chromium alloy cast body, which makes them especially suitable for those cases where the gases contain corrosive substances and then it would not be advisable, even nearly impossible, to use other kind of recuperators constructed in rolled steel sheet.
The said cast body is fitted with a set of ribs in the air side, which provides the heat exchange between primary and secondary fluids resulting in lower wall temperatures.
It makes possible to use less exigent materials for the construction of the exchange element and this implies an important reduction in the recuperator cost.