| abstract |
The invention relates to a heat exchanger (1) with tubes (3) extending in a longitudinal direction, the tubes (3) being spaced apart with their longitudinal directions and having surface enlarging structures (5) arranged in planes aligned parallel to one another, which tubes (3 ) are connected to each other, wherein the tubes (3) extend within the planes (2) and the surface enlargement structures (5) are formed with each other without interlacing. Furthermore, the invention relates to a process for its preparation and use. |