AIR HEATING STOVE Russian patent published in 1995 - IPC

FIELD: power engineering. SUBSTANCE: stove has casing in the form of four separate compartment two of which are located at opposite side walls of combustion chamber and follow contour of identical cross-displaced alternating arc-shsped channels provided on outer surface of combustion chamber; two other compartment are arranged above upper and under lower walls of chamber and are essentially surfaces concave towards chamber; upper compartment of casing is mounted for displacement of its side edges. Distance d from any compartment of casing to arc-shaped surface of heat-exchange channels meets relation d ≅ 2δ, where d is thickness of free-convection boundary layer. EFFECT: improved capacity and efficiency.