Patent ID: 6997249

Claim:
A modular fluid line system adapted for transporting a working fluid comprising: at least two series-connectable fluid line members having a working-fluid-line portion adapted to transport said working fluid and having a substantially annular flow cross-section; said annular flow cross-section having an outer diameter (D A ), an inner diameter (D I ), a fluid line diameter D AD =√(D A 2 −D I 2 ) and a surface ratio O=(D I +D A )/D AD between O=1 and O=4; an internal temperature control device arranged in the center of said fluid line member and adapted to control the temperature of said working fluid in said annular flow cross-section; and a plurality of spacers extending radially from said temperature control device to said outer wall of said working fluid line portion through said annular flow cross-section, the internal temperature control device being designed as a tubular temperature-control fluid line adapted to transport a temperature control fluid wherein a feed line is provided, said feed line extending in said spacers and supplying said temperature control fluid to said temperature control device from outside said fluid line member.