Multiple coil heat exchanger

摘要: A compact multiple coil heat exchanger having a high transfer density is provided to include at least an inner formed from continuous tube into plurality of contiguous turns about common axis in spiral arrangement and pitch one direction outer the overlapping concentrically opposite pitch. Further, coil-forming apparatus method directed form using die rotatably mounted on support frame. The includes thread constructed receive laterally while fabricating according this invention. terminates end thereof coil-reversing plate first portion which spirals outward radial position above second axially extends towards one-piece exchanger.