Heat exchanger for the ultrarapid, low-loss heating and cooling of fluids, in particular in hot-gas engines, Stirling engines and refrigerating machines

摘要

A main problem, e.g. in Stirling engines, is the necessity for rapid heat transfer between the working gas and heat source or cooling surface. This problem is solved by this invention with the aid of a rotor disc (B) which is occupied in a suitable way by thin lamellae (D) and which rotates rapidly in a narrow air gap (C) and in the process drives the molecules of the working gas through the air gap, i.e. along the heat exchange surfaces (E) (Figs. 1 and 2). A heat-insulating boundary layer cannot form on the heat transfer surfaces, because just as it is formed it is "peeled off", as it were, by the lamellae acting like a squeegee (doctor blade). The intrinsic volume of this "circulating pump" is negligible by comparison with the working volume of the working gas, and the power requirement is slight. As demonstrated in trials, the total working gas is thus brought within a very short time into close contact with the heat exchange surfaces. This permits higher speeds, i.e. a higher power per unit of weight, in conjunction with a lower temperature loss in the heat transfer, i.e. a better efficiency of the machine. IMAGE