| 摘要 |
PURPOSE:To enhance the heat efficiency, miniaturization, reliability and economical ability of a Stirling engine, by forming recesses in the inner peripheral surface of at least either one of two kinds of pipes constituting a heater for heating working medium and a cooler for cooling working medium. CONSTITUTION:A heater 6 shorter than a conventional heater 2 is formed with recesses 61 having a depth less than one-third of the pipe-wall thickness, in the inner surface of the heater pipes, so that the heat-transmitting area may be enlarged without the proof-pressure of the pipes being largely deteriorated. With this arrangement, its effective heat transmitting efficiency may be made high, but its length may be shortened so that its dead space volume may be reduced. The compression ratio by which the volume of a heater occupied space is reduced by a half, may be increased, and the output power and heat efficiency may be enhanced. Further, the miniaturization, reliabiity and economical ability of the Stirling engine may be also enhanced. |
