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首页> 外文会议>ASME(American Society of Mechanical Engineers) International Mechanical Engineering Congress: Advanced Energy Systems Division; 20031115-20031121; Washington,DC; US >BASIC LIMITATIONS ON THE PERFORMANCE OF STIRLING ENGINES
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BASIC LIMITATIONS ON THE PERFORMANCE OF STIRLING ENGINES

机译：斯特林发动机性能的基本限制

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摘要

The performance of Stirling engines is subject to limitations resulting from power dissipation in the regenerator. The dissipation is caused by pressure gradients in the regenerator required to generate flow. Without this flow the power output would be zero. Hence the dissipation is an essential element of the operation of the engine. Using linearized theory, the equation for pressure in the regenerator is solved for the case of a linear temperature distribution. The regenerator is taken to be thermally perfect. All variations are taken to be sinusoidal in time. Expressions are derived for the net power output and the thermal efficiency. The net power output is optimized under various constraints. The constraint yielding the best results is fixed piston amplitude in the compression chamber. Upper bounds on the dimensionless power output are found as function of regenerator void volume and regenerator temperature ratio. These bounds are derived in the limit of zero frequency, and are independent of the conductance of the regenerator. Both power output and thermal efficiency decrease as frequency and regenerator void volume increase.
机译：斯特林发动机的性能受到再生器功率消耗的限制。耗散是由产生流量所需的蓄热室中的压力梯度引起的。没有这种流量，功率输出将为零。因此，耗散是发动机运转的基本要素。使用线性化理论，对于线性温度分布的情况，求解了蓄热室中的压力方程。蓄热器被认为是热完美的。所有变化在时间上都是正弦的。导出了净功率输出和热效率的表达式。净功率输出在各种约束条件下进行了优化。产生最佳结果的约束条件是压缩室内的活塞振幅固定。发现无量纲功率输出的上限是再生器空隙体积和再生器温度比的函数。这些界限是在零频率的极限内得出的，并且与再生器的电导无关。功率输出和热效率都随着频率和再生器空隙体积的增加而降低。

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