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Mechanical Configuration and Thermodynamic Analysis of an Alpha-Type Stirling Engine with Crank-Shifted Driving Mechanism
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering ( IF 1.3 ) Pub Date : 2021-04-18 , DOI: 10.1007/s40997-021-00436-2
Halit Karabulut , Melih Okur , Can Cinar

This study involves performance examination of an alpha-type novel Stirling engine and performance comparison with a V-type alpha engine. The novel engine displays very different features from the conventional V-type alpha engine. In the conventional engine, the work calculated with nodal analysis (real work) is lesser than isothermal work. In the novel engine, however, the real work becomes larger than the isothermal work if the heat transfer in compression and expansion cylinders is poor. If performances of engines are compared for equal amount of working fluid mass, the real work of the novel engine is always larger than the real work of the conventional V-type alpha engine. If performance comparison is made for equal amount of charging pressure of the working fluid, the difference of works of engines becomes multiple. The thermal efficiency of the novel engine is also greater. At relatively lower speeds and lower charging pressures of the engine, the efficiency difference between novel engine and conventional engine becomes more than 25%. The mean gas pressure in the novel engine is about 40% lesser than that in the conventional engine. All of the properties of the novel engine were found to be advantageous except flow losses.



中文翻译:

曲柄变速驱动α型斯特林发动机的力学性能及热力学分析

这项研究涉及对新型阿尔法斯特林发动机的性能检查,以及与V型阿尔法发动机的性能比较。该新颖的发动机显示出与常规的V型α发动机完全不同的特征。在常规发动机中,通过节点分析计算的功(实际功)要小于等温功。然而,在新型发动机中,如果压缩和膨胀气缸中的传热差,则实际功将大于等温功。如果在相等的工作流体质量下比较发动机的性能,则新型发动机的实际功总是大于传统V型发动机的实际功。型Alpha引擎。如果对相等量的工作流体的增压压力进行性能比较,则发动机的功差将成倍增加。新型发动机的热效率也更高。在发动机的相对较低的速度和较低的充气压力下,新型发动机和常规发动机之间的效率差变得大于25%。新型发动机中的平均气压比常规发动机中的平均气压低约40%。发现除了流动损失之外,新型发动机的所有特性都是有利的。

更新日期:2021-04-18
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