A regenerator matrix for effecting the transfer of heat between two counter-flowing
air streams separated in part by face seals. The matrix includes strips of material
wound about an axis so as to provide a plurality of layers. The matrix also includes
embossments located on at least some of the layers and providing interlayer spaces
between at least some of the layers, such that the interlayer spaces extend through
the matrix substantially parallel to the axis. The embossments have a uniform height
and include primary and secondary embossments. The primary embossments extend substantially
parallel to the axis to divide the interlayer spaces into gas passageways and substantially
resist circumferential gas leakage between the gas passageways. The primary embossments
are also for aligning with the face seals to prevent circumferential gas leakage
between the two counter-flowing air streams, and are successively spaced so that
at most two successive primary embossments will align with the face seals. The
secondary embossments maintain the interlayer spaces at a substantially uniform
spacing between the primary embossments, yet allow circumferential gas flow within
the gas passageways.
