DESIGN AND OPTIMIZATION METHOD OF FREE PISTON STIRLING GENERATOR

Chi Chunyun; Lin Mingqiang; Mou Jian; Li Ruijie; Jiao Kexin; Hong Guotong

doi:10.19912/j.0254-0096.tynxb.2022-0450

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (7) : 235-240. DOI: 10.19912/j.0254-0096.tynxb.2022-0450

DESIGN AND OPTIMIZATION METHOD OF FREE PISTON STIRLING GENERATOR

Chi Chunyun¹, Lin Mingqiang¹, Mou Jian¹, Li Ruijie^1,2, Jiao Kexin^1,2, Hong Guotong^1,2

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Abstract

Based on the significant demand for solar energy application in the future and the relatively weak development status of domestic Stirling power generation technology, a design and optimization method of free piston Stirling generator is proposed. The thermodynamic model of the generator is established by using Sage software. The optimization function of Sage software is used to optimize the generator parameters, and the optimized results are corrected combined with the mechanical equilibrium equation of linear motor. With the usage of the method, a new prototype is designed and the effect of different parameters （i.e. cold end temperature, piston spring stiffness, and operating pressure） on performance is obtained, which were compared with the experiment results. The results illustrate that the effect of each parameter on generator output performance is consistent with the simulation. When the temperatures of the hot end and cold end are 865 K and 300 K, respectively, the electrical power of the new prototype is 136.6 W and the thermal-electric efficiency is 27.8% which is 10.4% higher than that of the original prototype, error between experiment and simulation is 6.0%.

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free piston / Stirling generator / thermodynamics / mechanical equilibrium equation

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Chi Chunyun, Lin Mingqiang, Mou Jian, Li Ruijie, Jiao Kexin, Hong Guotong. DESIGN AND OPTIMIZATION METHOD OF FREE PISTON STIRLING GENERATOR[J]. Acta Energiae Solaris Sinica. 2023, 44(7): 235-240 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0450

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