Condensation heat exchanger

Details Condensation heat exchanger Condensation heat exchanger

F - Mech Eng,Light,Heat,Weapons

28

F

F28F 13/18 (2006.01) C23C 28/00 (2006.01) C23C 28/04 (2006.01) F28F 13/04 (2006.01) F28F 19/02 (2006.01)

Patent

CA 2428650

The heat transfer surfaces of a condensation heat exchanger are provided with a coating according to the invention which comprises a sequence of layers which includes at least one hard layer which comprises amorphous carbon or a plasma polymer and at least one soft layer which comprises amorphous carbon or a plasma polymer. The hard and soft layers are applied alternately, the first layer on the heat transfer surface being a hard layer and the last layer of the coating being a soft layer. The last, soft layer is distinguished in particular by hydrophobic properties. The layer sequence ensures condensation of drops and, at the same time, protects against drop impingement erosion.

Les surfaces de transfert de chaleur d'un dispositif de transfert de chaleur de condensation sont pourvues d'un revêtement selon l'invention, constitué d'une série de couches comprenant au moins une couche rigide, qui contient du carbone amorphe ou un polymère de plasma, et au moins une couche souple contenant du carbone amorphe ou un polymère de plasma. Ces couches rigides et souples sont appliquées en alternance, la première couche déposée sur la surface de transfert de chaleur étant une couche rigide et la dernière couche du revêtement une couche souple. La dernière couche souple est caractérisée en particulier par des propriétés hydrophobes. La série de couches assure simultanément la condensation de gouttes et une protection contre l'érosion provoquée par les impacts de gouttes.

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