Patent ID: 7861549

Claim:
A cooling device, comprising: a primary medium circuit and a secondary medium circuit thermally coupled thereto via an at least partially heat-conducting wall, through which two circuits a primary medium and a secondary medium can flow in counterflow; said at least partially heat-conducting wall has heat-conducting protrusions which enlarge an effective heat-conducting surface area of said wall; wherein the heat conducting protrusions are configured as break-up components for breaking up at least a thermal boundary layer, a laminar boundary layer and a relative humidity boundary layer, of at least the secondary medium flowing in the secondary medium circuit and are at least partially covered at least in the secondary medium circuit with a hydrophilic coating for retaining an evaporable liquid and relinquishing it again through evaporation; and a wetting unit for subjecting the coating in the secondary medium circuit to wetting by the evaporable liquid.