High Temperature Recuperators 

JSGT 1942 V26 T005-T021

In designing a recuperator for use at high temperatures metal parts may be employed, but the shape must be simple both from structural considerations and to keep the pressure drop in the gas passages low. The limits of temperature possible are usually set by the materials of construction. In calculating the design, attention is directed to the films at the surfaces of the metal. In the air side the coefficients are reasonably well established, but on the gas side the calculation of the heat transfer is complex. The radiation from the· waste gases is considerable and the rate of heat transfer is increased by the inclusion of brickwork amongst the tubes. This increase amounts to some 40% of the heat transferred, depending on the temperatures involved.

J. B. Wagstaff, S.M., B.Sc.