Rotary heat exchanger

A rotary heat exchanger for heat exchange between at least two gaseous media, said rotary heat exchanger comprising:

• a housing having first and second inlet openings;
• an annular heat transfer member disposed rotatably in said housing, said heat transfer member comprising a fiber material having a three dimensional lattice structure for flow communication and an interior cavity;
• a partitioning wall means for dividing said interior cavity of each said heat transfer member into two simicircular chambers, said first and second inlet openings of said housing communicating with a respective one of said two semicircular chambers, said partitioning wall means having a pair of edges and a screening wall extending from each of said pair of edges only in a direction opposite to the direction of rotation of said heat transfer member and adjacent to said annular heat transfer member;
• and first and second outlet diffuser chambers disposed in a substantially mutually opposite relationship external to said heat transfer member, each of said outlet diffuser chambers having an outlet and increasing in width from adjacent said heat transfer member towards said outlet of said outlet diffuser chambers wherein said partitioning wall means is coated with a heat insulating material.