Outputs (18)

Techno-economic assessment of a fuel flexible free piston engine generator based energy system for cold ironing application (2025)
Journal Article
Roy, D., Ngwaka, U., Shivaprasad, K. V., Zhu, S., Taghavifar, H., Williams, R., Smallbone, A., & Roskilly, A. P. (2025). Techno-economic assessment of a fuel flexible free piston engine generator based energy system for cold ironing application. Energy, 332, Article 136954. https://doi.org/10.1016/j.energy.2025.136954

This study assesses the techno-economic viability of a fuel-flexible free piston engine generator (FPEG) for providing shore power to maritime vessels (cold ironing) within ports. In cold ironing applications a localised power generation is required... Read More about Techno-economic assessment of a fuel flexible free piston engine generator based energy system for cold ironing application.

Simulation and performance optimization of a novel hybrid CCHP system based on the prime movers of internal combustion engine and Stirling engine (2025)
Journal Article
Sheykhi, M., Mehregan, M., Ghorbani, S., Emamian, A., Kayhani, M. H., Delouei, A. A., Kharazmi, S., Sheykhian, M. K., & Zhu, S. (2025). Simulation and performance optimization of a novel hybrid CCHP system based on the prime movers of internal combustion engine and Stirling engine. Applied Energy, 393, Article 126103. https://doi.org/10.1016/j.apenergy.2025.126103

Combined cooling, heating, and power systems (CCHP) could increase the efficiency of conventional energy supply systems and mitigate carbon emissions. In this paper, a novel arrangement of a combined cooling, heating, and power (CCHP) system is prese... Read More about Simulation and performance optimization of a novel hybrid CCHP system based on the prime movers of internal combustion engine and Stirling engine.

Experimental and numerical study on radiative cooling of a linear alternator in a free-piston Stirling electric generator (2025)
Journal Article
Jin, Q., Yu, G., Sun, H., Luo, J., Ma, H., Li, Y., Zhu, S., & Luo, E. (2025). Experimental and numerical study on radiative cooling of a linear alternator in a free-piston Stirling electric generator. Energy Conversion and Management: X, 26, Article 101043. https://doi.org/10.1016/j.ecmx.2025.101043

Heat rejection of a linear alternator (LA) plays a pivotal role in achieving high performance and a long lifetime. This paper proposes an innovative approach for the first time that utilizes a high emissivity coating formulated from a blend of micros... Read More about Experimental and numerical study on radiative cooling of a linear alternator in a free-piston Stirling electric generator.

Numerical study and sensitivity analysis of heat transfer characteristics of heat exchangers in a high-power free-piston Stirling generator (2025)
Journal Article
Wang, H., Chen, Y., Zhu, S., Zhang, L., Yu, G., Kang, H., & Luo, E. (2025). Numerical study and sensitivity analysis of heat transfer characteristics of heat exchangers in a high-power free-piston Stirling generator. Sustainable Energy Technologies and Assessments, 75, Article 104243. https://doi.org/10.1016/j.seta.2025.104243

The increasing of deep space exploration missions has promoted research on space nuclear power systems worldwide. Stirling generators, especially free-piston Stirling generators (FPSGs), are a promising dynamic energy conversion technology for space... Read More about Numerical study and sensitivity analysis of heat transfer characteristics of heat exchangers in a high-power free-piston Stirling generator.

Investigation of the operating characteristics of a free-piston closed-cycle Joule engine generator with helium as working fluid (2025)
Journal Article
Wang, B., Zhu, S., Ngwaka, U., Jia, B., Vijayalakshmi Shivaprasad, K., Wang, Y., Smallbone, A., Paul Roskilly, A., & Luo, E. (2025). Investigation of the operating characteristics of a free-piston closed-cycle Joule engine generator with helium as working fluid. Energy Conversion and Management: X, 26, Article 100909. https://doi.org/10.1016/j.ecmx.2025.100909

As an emerging micro- or small-scale energy conversion technology, linear Joule engine generators (LJEGs) combine the advantages of external combustion engines and linear generators, feature the advantages of high thermal-to-electrical efficiency, mu... Read More about Investigation of the operating characteristics of a free-piston closed-cycle Joule engine generator with helium as working fluid.

Experimental and numerical study on the mechanical inconsistency of a dual-opposed free-piston Stirling engine generator (2025)
Journal Article
Sun, H., Jin, Q., Yu, G., Zhu, S., & Luo, E. (2025). Experimental and numerical study on the mechanical inconsistency of a dual-opposed free-piston Stirling engine generator. Energy, 315, Article 134432. https://doi.org/10.1016/j.energy.2025.134432

The dual-opposed free-piston Stirling generator (FPSG) presents potential advantages in terms of heightened efficiency, diminished vibrations, and flexible operation. However, the challenge encountered on a dual-opposed configuration posed by compone... Read More about Experimental and numerical study on the mechanical inconsistency of a dual-opposed free-piston Stirling engine generator.

A preliminary experimental study on a free-piston engine generator prototype (2025)
Presentation / Conference Contribution
Zhu, S., Vijayalakshmi, S., Ngwaka, U., Roy, S., Williams, R., Smallbone, A., & Roskilly, A. P. (2024, September). A preliminary experimental study on a free-piston engine generator prototype. Presented at Energy Proceedings, Niigata, Japan

As an emerging micro- or small-scale energy conversion technology, free-piston engine generator (FPEG) features the advantages of high efficiency, high volumetric power density, and multi-fuel adaptability potential. To solve the issues that the prev... Read More about A preliminary experimental study on a free-piston engine generator prototype.

A novel high-power free-piston stirling engine generator with integrated heat pipes for thermal-to-electric conversion of clean energy (2024)
Journal Article
Wang, H., Chen, Y., Luo, J., Zhang, L., Kang, H., Luo, E., & Zhu, S. (2025). A novel high-power free-piston stirling engine generator with integrated heat pipes for thermal-to-electric conversion of clean energy. Energy, 314, Article 134218. https://doi.org/10.1016/j.energy.2024.134218

The free-piston Stirling generator (FPSG) has emerged as a promising solution to meet the increasing energy demand of various small- or micro-scale application scenarios. Known for its high durability and high efficiency across various application sc... Read More about A novel high-power free-piston stirling engine generator with integrated heat pipes for thermal-to-electric conversion of clean energy.

Harnessing acoustic energy with liquid metal triboelectric nanogenerators: A promising approach for moving-parts-free power generation (2024)
Journal Article
Ahmed, F., Wang, J., Yang, R., Yu, G., Zhu, S., Tang, W., & Luo, E. (2025). Harnessing acoustic energy with liquid metal triboelectric nanogenerators: A promising approach for moving-parts-free power generation. Applied Thermal Engineering, 260, Article 125048. https://doi.org/10.1016/j.applthermaleng.2024.125048

Heat-driven acoustic engines (HDAEs) offer a promising approach to energy generation without solid moving parts. However, integrating linear alternators for acoustic-to-electric conversion introduces moving components, diminishing this advantage. To... Read More about Harnessing acoustic energy with liquid metal triboelectric nanogenerators: A promising approach for moving-parts-free power generation.

Operating characteristics study of a dual-opposed free-piston Stirling generator (2024)
Journal Article
Sun, H., Yu, G., Zhao, D., Zhu, S., Dai, W., & Luo, E. (2024). Operating characteristics study of a dual-opposed free-piston Stirling generator. Applied Thermal Engineering, 249, Article 123387. https://doi.org/10.1016/j.applthermaleng.2024.123387

Dual-opposed Free-piston Stirling generators (dual-opposed FPSGs) offer advantages of reduced vibration and increased power density, making them promising candidates for space and distributed energy applications. So far, operational characteristics o... Read More about Operating characteristics study of a dual-opposed free-piston Stirling generator.