Numerical investigation on key parameters of a double-acting free piston Stirling generator

被引：13

作者：

Chang, Depeng ^{[1
,2
]}

Hu, Jianying ^{[1
]}

Sun, Yanlei ^{[1
]}

Zhang, Limin ^{[1
]}

Chen, Yanyan ^{[1
]}

Luo, Ercang ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

ENERGY | 2023年 / 278卷

基金：

中国国家自然科学基金;

关键词：

Double-acting; Free-piston Stirling; Unit number; Parameter inconsistency; ENGINE; OPTIMIZATION; HEAT;

D O I：

10.1016/j.energy.2023.128003

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Exploring efficient renewable energy conversion devices is one of the vital subjects to address the current energy crisis. Double-acting free piston Stirling generator is a promising type of Stirling generator with the advantages of high efficiency and wide energy adaptability, so it has a bright future in the energy sector. In this paper, the SAGE software and acoustic-electric coupling model are used in the generator system for exploring the influence of key parameters on performance. The results indicate that the system exhibits higher power output when the unit number is 4 or 5. The piston clearance may induce greater exergy losses in a double-acting configuration, because of the greater pressure difference and the temperature difference on the two sides of the pistons. Reducing dead volume can improve power density and efficiency. Moreover, any parameter inconsistencies between units can affect the output electric powers of all units. Further investigation reveals that this issue can be effectively addressed by adjusting the external resistance and reactance. This work may offer some guidance for the design of double-acting free piston Stirling electric generators.

引用

页数：12

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