| 摘要 |
The present invention relates to a device for heating a heat transfer medium, comprising a heating unit designed to generate a source of heat, a heat transfer area, a wall, e.g. a vessel wall or a pipe wall, between the source of heat ant the heat transfer area, as well as a selective layer on at least one side of the wall, which layer furthers the absorption by said wall of the calorific power from the source of heat and/or inhibits heat emission from said wall towards the source of heat. |
