Development of low-temperature Stirling engine for autonomous solar cogeneration plant
Sarsikeyev Y.Z. Mekhtiyev A.D. Angsapov A.E. Alkina A.D. Shaimerdenova R.T. Sharipov T.N.
2026Springer
Russian Physics Journal
2026
The paper presents the design and development of a low-temperature Stirling engine with the external heat supply, intended for autonomous cogeneration power systems. The engine utilizes thermal energy from a solar collector, which heats the working fluid to temperatures ranging from 90 to 100 °C. A key innovation of the proposed system lies in the significantly increased swept volume of the displacer, which exceeds the volume of the power piston by a factor of 20 to 40. This configuration enables a stable engine operation under relatively low temperature differentials between the heater and the cooler. Experimental investigations, supported by numerical modeling, confirm the feasibility and efficiency of the proposed design. Under operating conditions with a temperature differential of approximately 65 to 75 °C and a working fluid pressure up to 0.3 MPa, the engine demonstrates a mechanical output ranging from 5 to 15 W and a corresponding thermal efficiency of 2 to 4%. Notable performance improvements are observed when air is replaced by helium with the incorporation of the working medium and a regenerator into the system. The cogeneration capability of the system is realized through the recovery and utilization of residual heat from the cooling circuit for space heating and domestic hot water supply. The engine is designed for a fully autonomous operation in remote or off-grid areas, including rural settlements, greenhouse complexes, and other energy-demanding infrastructure. When integrated with a solar collector and thermal energy storage unit, the system offers the potential for continuous, around-the-clock electricity and heat generation.
621.311.22 , External combustion engine , Low-grade heat , Renewable energy , Stirling engine , Thermal energy conversion
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Kazakh Agrotechnical Research University, Astana, Kazakhstan
Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan
Kazakh Agrotechnical Research University
Abylkas Saginov Karaganda Technical University
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026