Intertwined coil heat exchanger

A heat exchanger comprising:

• a plurality of tubular fluid channels each having:
• an external tubular diameter or equivalent diameter;
• two openings into the interior of the tubular fluid channel, said openings being arranged at distant end positions of the fluid channel;
• wherein
• each of the plurality of tubular fluid channels are formed as a helical coil, over at least a part of their lengths, each coil being provided as a plurality of windings, each of said coils evolving with a centre path;
• the coils of the plurality of tubular fluid channels are intertwined around one another with the centre path of each coil being distant from the centre path of the other coils, and each of the centre paths forms an intertwined helix, and;
• in a transverse cross section of the heat exchanger, a planar representation of a winding of a first of said coils overlaps a planar representation of a winding of each of the other said coils of said plurality of tubular fluid channels;
• wherein the distance between the centre paths of said coils is selected to provide a substantially tubular, central space extending through-out the inside of all of the coils;
• and
• further including at least one non-coiled tubular fluid connection arranged in said substantially tubular, central space, and wherein said coils of the plurality of the fluid channels twist around said at least one non-coiled tubular fluid connection.