ЕЛЕКТРОУСТАНОВКА З ТВЕРДОТІЛЬНИМ ТЕПЛОВИМ ДВИГУНОМ  НА ОСНОВІ СПЛАВІВ З ПАМ’ЯТТЮ ФОРМИ ДЛЯ ГЕНЕРАЦІЇ ЕЛЕКТРИЧНОЇ ЕНЕРГІЇ  З НИЗЬКОПОТЕНЦІЙНИХ ДЖЕРЕЛ ТЕПЛА

V.V. Kozyrskyi; A.V. Zhyltsov; V.Ya. Bunko

No. 3 (2026), Electric Power Systems and Installations

No. 3 (2026)

Electric Power Systems and Installations

ELECTRICAL INSTALLATION WITH A SOLID-STATE THERMAL ENGINE BASED ON SHAPE MEMORY ALLOYS FOR GENERATING ELECTRICITY FROM LOW-POWER HEAT SOURCES

Published 2026-04-30

V.V. Kozyrskyi⁺⁻
A.V. Zhyltsov⁺⁻
V.Ya. Bunko⁺⁻

V.V. Kozyrskyi

ALOTEK Technology sp.z.o.o., Zadabrowie 311, Krakowska 11, 37-716, Orly, Poland

https://orcid.org/0000-0001-6780-9750

A.V. Zhyltsov

Institute of Electrodynamics National Academy of Sciences of Ukraine, 56, Beresteiskyi Ave., Kyiv, 03057, Ukraine

https://orcid.org/0000-0002-1688-7879

V.Ya. Bunko

Separated Subdivision of National University of Life and Environmental Sciences of Ukraine «Berezhany Agrotechnical Institute», 20, Akademichna Str., Berezhany, Ternopil region, 47501, Ukraine

https://orcid.org/0000-0002-9403-8135

Keywords

shape memory alloys
heat engine
electricity generation сплави з пам’яттю форми
тепловий двигун
електрогенерація

How to Cite

[1]

Kozyrskyi, V. et al. 2026. ELECTRICAL INSTALLATION WITH A SOLID-STATE THERMAL ENGINE BASED ON SHAPE MEMORY ALLOYS FOR GENERATING ELECTRICITY FROM LOW-POWER HEAT SOURCES. Tekhnichna Elektrodynamika. 3 (Apr. 2026), 079.

Abstract

The work is devoted to the study of processes of conversion of low-potential thermal energy into electrical energy using a solid-state heat engine based on shape memory alloys (SMA). The relevance of the topic is due to significant losses of low-temperature heat in industrial and energy systems and the need to improve the energy efficiency of autonomous power sources. NiTi alloy springs are used as drive elements, which implement reversible austenite-martensite phase transformations and ensure the direct conversion of thermal energy into mechanical work. The aim of the work is to develop a physically based mathematical and numerical model of a heat engine, taking into account cyclic heating and cooling, thermomechanical hysteresis, the inertia of the mechanical system and electromechanical interaction with the generator, as well as to evaluate the energy characteristics of the power generation plant. A three-level approach to modelling is proposed, including an analytical quasi-static model for engineering estimates, a quasi-stationary moment balance model for determining steady states, and a complete dynamic system of differential equations that takes into account non-stationary heat transfer, phase kinetics, and inertial effects. Numerical integration was performed in Python using fourth- and fifth-order Runge–Kutta methods. The simulation results confirmed the adequacy of the proposed model and showed the formation of self-stabilised rotation modes and power saturation. It was found that simplified approaches provide a conservative estimate of energy performance, while the full dynamic model more accurately reproduces transient processes and real operating characteristics; the discrepancy between the models does not exceed 15–20%. The influence of the bilateral shape memory effect, which in the temperature range of 70–80 °C can increase electrical power by 20–30 %, was investigated. The expediency of partial immersion of SMA elements in the coolant to ensure stable cyclic heat exchange was demonstrated. The results obtained confirm the prospects of using SMA engines for the utilisation of low-potential heat and the creation of compact autonomous systems for small-scale electricity generation. References 20, figures 7.

References

1. Kozyrskyi V., Bunko V. Experimental Studies of Elements from the Functional Intermetallic Cu-Al-Mn for Construction of a Heat Engine and Power Plant. Problems of the Regional Energetics. 2025. No 3(67). Pp. 162-173. DOI: https://doi.org/10.52254/1857-0070.2025.3-67.14.

2. Otsuka K., Ren X. Physical metallurgy of Ti–Ni-based shape memory alloys. Progress in Materials Science. 2005. Vol. 50. Issue 5. Pp. 511-678. DOI: https://doi.org/10.1016/j.pmatsci.2004.10.001.

3. Lagoudas D.C. Shape Memory Alloys. New York, NY: Springer, 2008. 436 p. DOI: https://doi.org/10.1007/978-0-387-47685-8.

4. Md. Ismail Hossain, Rabbi M.S., Ali M.T. Shape memory alloys in modern engineering: progress, problems, and prospects. RSC Advances. 2025. Vol. 15. Issue 40. Pp. 33046-33100. DOI: https://doi.org/10.1039/d5ra04560f.

5. Prashant Kumar, Ravi Anant Kishore, Deepam Maurya, Colin J. Stewart, Reza Mirzaeifar, Eckhard Quandt, Shashank Priya. Shape memory alloy engine for high efficiency low-temperature gradient thermal to electrical conversion. Applied Energy. 2019. Vol. 251. DOI: https://doi.org/10.1016/j.apenergy.2019.05.080.

6. Wakjira J.F. The VT1 shape memory alloy heat engine design. Virginia Tech. 2001. 107 p. URL: http://hdl.handle.net/10919/31196 (accessed at 10.01.2026)

7. Schiller E.H. Heat engine driven by shape memory alloys. Virginia Tech. 2002. 80 p. URL: http://hdl.handle.net/10919/35185 (accessed at 10.01.2026)

8. Arthur Adeodato, Brenno T. Duarte, Luciana Loureiro S. Monteiro, Pedro Manuel C.L. Pacheco, Marcelo A. Savi. Synergistic use of piezoelectric and shape memory alloy elements for vibration-based energy harvesting. International Journal of Mechanical Sciences. 2021. Vol. 194. DOI: https://doi.org/10.1016/j.ijmecsci.2020.106206.

9. Ma J., Karaman I., Noebe R.D. High temperature shape memory alloys. International Materials Reviews. 2010. Vol. 55(5). Pp. 257-315. DOI: https://doi.org/10.1179/095066010X12646898728363.

10. Liping Kang, Hui Qian ,Yuancheng Guo, Chenyang Ye, Zongao Li. Investigation of Mechanical Properties of Large Shape Memory Alloy Bars under Different Heat Treatments. Materials. 2020. Vol. 13(17). DOI: https://doi.org/10.3390/ma13173729.

11. Zanotti C., Giuliani P., Chrysanthou A. Martensitic–Austenitic phase transformation of Ni–Ti SMAs: Thermal properties. Intermetallics. 2012. Vol. 24. Pp. 106-114. DOI: https://doi.org/10.1016/j.intermet.2012.01.026.

12. Dong Sun, Shuyong Jiang, Peng Lin, Bingyao Yan, Hao Feng, Ming Tang, Yanqiu Zhang. High yield stress and narrow phase transformation hysteresis of thermomechanical-processing NiTiCu shape memory alloy. Materials Science and Engineering: A. 2024. Vol. 897. Article no 146340. DOI: https://doi.org/10.1016/j.msea.2024.146340.

13. Abdelmoneim El Naggar, Maged A. Youssef. Shape memory alloy heat activation: State of the art review. AIMS Materials Science. 2020. Vol. 7(6). Pp. 836-858. DOI: https://doi.org/10.3934/matersci.2020.6.836.

14. Dong Cao, Chao Liu, Zhigang Yang, Sida Zhang. A power generation device based on shape memory alloy and piezoelectric ceramic. Materials Chemistry and Physics. 2023. Vol. 301. Article no 127598. DOI: https://doi.org/10.1016/j.matchemphys.2023.127598.

15. Shadab Ahmad, Abdul Wahab Hashmi, Jashanpreet Singh, Kunal Arora, Yebing Tian, Faiz Iqbal, Mawaheb Al-Dossari, M. Ijaz Khan. Innovations in additive manufacturing of shape memory alloys: Alloys, microstructures, treatments, applications. Journal of Materials Research and Technology. 2024. Vol. 32. Pp. 4136-4197. DOI: https://doi.org/10.1016/j.jmrt.2024.08.213.

16. H.M. Wasi Uddin, Qazi Riti Mahpara Progoti, Mahadesh Chandro Mondal, Shifat E. Arman, Sadit Bihongo Malitha. Adaptive nickel–titanium shape memory alloy for smart systems: Mechanisms, manufacturing, and applications across biomedical, aerospace, civil, and energy. Materials Today Communications. 2026. Vol. 50. DOI: https://doi.org/10.1016/j.mtcomm.2025.114564.

17. Kozyrskyi V.V, Kaplun V.V, Voloshyn S.M. Functional intermetallics in power plants. Kyiv: Komprynt, 2021. 347 p.

18. Chikhareva M., Vaidyanathan R. A Thermal, Mechanical, and Materials Framework for a Shape Memory Alloy Heat Engine for Thermal Management. Nanomaterials. 2023. Vol. 13(15). DOI: https://doi.org/10.3390/nano13152159.

19. Sivasanghari Karunakaran, Dayang Laila Abang Abdul Majid, Che Nor Aiza Jaafar, Muhammad Hussain Ismail, Husam Yahya Imran. Heating Techniques of Shape Memory Alloy (SMA) – A Review. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. 2022. Vol. 99(2). Pp. 207-220. DOI: https://doi.org/10.37934/arfmts.99.2.207220.

20. Adrian Petru Teodoriu, Bogdan Pricop, Leandru-Gheorghe Bujoreanu. Development of an alternating heat engine, actuated by shape memory alloys. Materials Today: Proceedings. 2023. Vol. 72. Part 2. Pp. 607-614. DOI: https://doi.org/10.1016/j.matpr.2022.10.226.