Abstract

This paper aims to analyze the thermodynamic performance of a gas turbine–Stirling engine hybrid system with series and parallel configurations. The proposed hybrid systems include two separate cycles. In the first configuration, a gas turbine is combined with two Stirling engines in series formation, and in the second configuration, this combination is implemented in parallel formation. By conducting a parametric study of the introduced hybrid systems, the effects of the compressor pressure ratio, temperature of turbine inlet gases, type of fluid used in the Stirling engine, number of heater tubes, number of meshes and the matrix porosity of regenerator on the hybrid system’s efficiency and power output are investigated. The findings indicate that by raising the compressor pressure ratio and turbine inlet gas temperature, the system’s efficiency and power generation capacity are increased more in the parallel configuration than in the series configuration. Based on the results of comparison, the power generated by the hybrid system in parallel configuration and series configuration is 2.18 times and 1.8 times the power generated by a simple gas turbine cycle, respectively. The obtained results reveal that the electrical efficiency of the hybrid system in parallel configuration and series configuration is 56% and 49%, respectively, while the efficiency of a gas turbine hybrid system with just one Stirling engine is 42% and that of a simple gas turbine cycle is 30%.

Graphic abstract

中文翻译：

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分析由燃气轮机和两个斯特林发动机组成的混合和串联配置的混合动力系统的热力学性能

摘要

本文旨在分析具有串联和并联配置的燃气轮机-斯特林发动机混合系统的热力学性能。提出的混合动力系统包括两个单独的循环。在第一构造中，燃气轮机与两个斯特林发动机以串联形式组合，并且在第二构造中，该组合以并联形式实施。通过对引入的混合动力系统进行参数研究，压缩机压力比，涡轮机进气温度，斯特林发动机所用流体的类型，加热器管的数量，网孔的数量以及蓄热室的基体孔隙度对发动机的影响。研究了混合动力系统的效率和功率输出。研究结果表明，通过提高压缩机压力比和涡轮进气温度，与并联配置相比，并联配置提高了系统的效率和发电能力。根据比较结果，混合动力系统并联配置和串联配置产生的功率分别是简单燃气轮机循环产生的功率的2.18倍和1.8倍。所得结果表明，并联配置和串联配置的混合动力系统的电效率分别为56％和49％，而只有一台斯特林发动机的燃气轮机混合动力系统的电效率为42％，而简单燃气轮机的效率为42％。涡轮机循环为30％。混合动力系统并联配置和串联配置产生的功率分别是简单燃气轮机循环产生的功率的2.18倍和1.8倍。所得结果表明，并联配置和串联配置的混合动力系统的电效率分别为56％和49％，而只有一台斯特林发动机的燃气轮机混合动力系统的电效率为42％，而简单燃气轮机混合动力系统的电效率为42％。涡轮机循环为30％。混合动力系统并联配置和串联配置产生的功率分别是简单燃气轮机循环产生的功率的2.18倍和1.8倍。所得结果表明，并联配置和串联配置的混合动力系统的电效率分别为56％和49％，而只有一台斯特林发动机的燃气轮机混合动力系统的电效率为42％，而简单燃气轮机混合动力系统的电效率为42％。涡轮机循环为30％。

图形摘要