Maximum Obtainable Efficiency For Engines And Refrigerators Based On The Stirling Cycle
Maximum Obtainable Efficiency For Engines And Refrigerators Based On The Stirling Cycle
复制标题
基于斯特林循环的发动机和冰箱可获得的最大效率
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
B. Lorentzen
中科院分区：
文献类型：
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作者：
H. Carlson;M. B. Commisso;B. Lorentzen
理想的斯特林循环的效率假定，圆柱体体积是等温的，并且圆柱体体积中的温度与散热器和热源中的温度相同。因此，效率与卡诺循环的效率相同。然而，在真实的斯特林机中，气缸容积几乎是绝热的而不是等温的，并且在热交换器中增加或移除热量。那么，即使在发生器和热交换器中具有理想的热传递，斯特林循环的效率也总是小于卡诺循环的效率。特别是对于斯特林基制冷机（其最近被讨论为使用CFC气体的制冷机的替代物），最大可获得的性能系数是重要的。基于一个具有理想换热器和回热器的简化斯特林循环，计算了斯特林循环的最大可能效率和无因次出力与死体积、相位角、热沉和热源温度的关系，并与卡诺循环的效率进行了比较。分析了圆柱体容积内传热的影响，并讨论了“等温器”的作用。
The efficiency of the ideal stirling cycle assumes, that the cylinder volumes are isothermal and that the temperatures in the cylinder volumes are identical to the temperatures in the heat sink and the heat source. The efficiency is then identical to the efficiency of the Carnot cycle. However, in a real stirling machine the cylinder volumes are nearly adiabatic instead of isothermal, and the heat is added or removed in heat exchangers. Then the efficiency of a stirling cycle will always be smaller than for a carnot cycle even with ideal heat transfer in.rogenerator and heat exchangers. Especially for stirling based refrigerators, which have been discussed recently as an alternative to refrigerators using CFC-gases, the maximum obtainable coefficient of performance is important. Based on a simplified stirling cycle with ideal heat exchangers and regenerators, the maximum possible efficiency and dimensionless output for a stirling cycle as a function of dead volume, phase angle and temperatures in heat sink and heat source are calculated and compared With the efficiency of the carnot cycle. Also the influence of heat transfer in the cylinder volumes is analyzed, and the effect of "isothermalizers" are discussed.