| 摘要 |
A heat exchanger for exchanging heat from an initially hot gas to an initially cooler gas. The heat exchanger includes a toroidal shell with inlet and outlet ports for passing the hot gas through the shell and an inner transverse wall for limiting annular flow of the hot gas to a single revolution within the shell. A coil of tubing is contained within the shell and is arranged in a plurality of spaced, annular bundles about the axis of the toroidal shell with sequential turns of tubing lying in different bundles and each turn of tubing within a bundle being spaced from the other turns of tubing in that bundle. The bundles are twisted with respect to one another about a centrally positioned annular support ring. At its down stream end, the tubing passes outwardly of the heat exchanger and the heated gas issuing therefrom may be used to drive, for example, a turbine.
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