Stirling Engine Configuration Selection
Stirling Engine Configuration Selection
复制标题
DOI：
10.3390/en11030584
复制
发表时间：
2018-03-01
期刊：
影响因子：
3.2
通讯作者：
Clucas, Don M.
中科院分区：
文献类型：
--
作者：
Egas, Jose;Clucas, Don M.
与内燃机不同，斯特林发动机可以设计成基于三种主要配置（alpha， beta和gamma）的多种驱动机制。已经提出了数百种不同的配置和机械驱动器组合。很少有人能在原型之外取得成功。不成功的一个原因是使用了不适当的配置和驱动机制，导致功率重量比低，降低了经济可行性。大量的选择，缺乏客观的比较方法，缺乏选择标准，迫使设计师做出随机选择。在本文中，得到了采用主要（α， β和γ）曲柄结构以及菱形传动和罗斯轭架机构的等维机器的压力-体积图和压缩比。从理想斯特林循环出发，推导了最佳压缩比与温度比之间存在直接关系，并通过实验数据验证了经验低温差压缩比方程在高温差应用中的可用性。如图所示，每台机器都有不同的压缩比，使其或多或少适合于特定的应用，这取决于可达到的温差。
Unlike internal combustion engines, Stirling engines can be designed to work with many drive mechanisms based on the three primary configurations, alpha, beta and gamma. Hundreds of different combinations of configuration and mechanical drives have been proposed. Few succeed beyond prototypes. A reason for poor success is the use of inappropriate configuration and drive mechanisms, which leads to low power to weight ratio and reduced economic viability. The large number of options, the lack of an objective comparison method, and the absence of a selection criteria force designers to make random choices. In this article, the pressure-volume diagrams and compression ratios of machines of equal dimensions, using the main (alpha, beta and gamma) crank based configurations as well as rhombic drive and Ross yoke mechanisms, are obtained. The existence of a direct relation between the optimum compression ratio and the temperature ratio is derived from the ideal Stirling cycle, and the usability of an empirical low temperature difference compression ratio equation for high temperature difference applications is tested using experimental data. It is shown that each machine has a different compression ratio, making it more or less suitable for a specific application, depending on the temperature difference reachable.