FIELD: engines and pumps.
SUBSTANCE: invention can be used in power converters incorporated with, for example, ICEs. Heat-exchange metal surface (1) has recesses (2) filled with material with heat conductivity lower than that of surface material (1). Recesses (2) are made by laser and feature the following sizes: diameter - 0.001-1 mm, depth - 0.2-10 of said diameters. Invention discloses design versions of engines, cylinder surfaces, those of pistons and their heads provided with heat-exchange metal surface (1) with recesses (2).
EFFECT: lower heat losses.
3 cl, 19 dwg, 1 tbl
