摘要:
A method for manufacturing a coil-on-tube heat exchanger is provided. The method comprises the steps of preforming a coil tube into a preformed coil tube, having an ovoid cross-section. The method further comprises exerting tension forces on the preformed coil tube and guiding the preformed coil tube to a central tube that is to be rotated and translated relative to the preformed coil tube and on which the preformed coil tube is to be wound. The winding of the preformed coil tube further deforms the preformed coil tube into a wound coil tube having an oval cross-section. An apparatus for manufacturing said coil-on-tube heat exchanger is further provided. A radially expandable shaft assembly for rotating the central tube that can be included in the apparatus is also described.