Abstract: A fluid conduit heating system includes a fluid transport conduit including a wall including a radially inner surface and a radially outer surface. The radially inner surface has a predetermined topography and the fluid transport conduit is configured to transport a hydrocarbon fluid therethrough. The system also includes a microwave heating device in radio frequency (RF) communication with the fluid transport conduit. The microwave heating device includes a microwave generator configured to generate microwave radiation and a waveguide coupled to the microwave generator. The waveguide is configured to conform a propagation pattern of the microwave radiation generated by the microwave generator to the predetermined topography of the radially inner surface.

Abstract: A subsea heat exchanger comprising a bundle of tubes comprising at least one tube winding arranged to operate submerged in water and effective for guiding a fluid to be cooled by surrounding water in contact with the tube, the bundle of tubes defining a longitudinal extension and a perimeter. A plurality of nozzles are distributed in spatial relation to said perimeter, wherein the nozzles are effective for discharging jets of water impinging on the tubes, the nozzles oriented to induce, in the ambient water volume, a displacement that passes the perimeter at a plurality of locations and directions.