Studying a low-temperature engine with external heat supply

作     者：A D Mekhtiyev V V Yugay A D Alkina Y G Neshina D E Kapanova 

作者机构：Department of Electrical Equipment Operation S.Seifullin Kazakh Agrotechnical University Nur-Sultan Kazakhstan Solar Cell Physics Research Laboratory National Research Tomsk Polytechnic University Tomsk Russia Department of The technology of communication systems Karaganda Technical University Karaganda Kazakhstan Department of Information Technology and Security Karaganda Technical University Karaganda Kazakhstan Department of Energy Systems Karaganda Technical University Karaganda Kazakhstan 

出 版 物：《Journal of Physics: Conference Series》 

年 卷 期：2021年第1843卷第1期

学科分类：07[理学] 0702[理学-物理学] 

摘      要：The article presents some results of studying the most optimal parameters of the displacer and the piston of a low-temperature engine with external heat supply to increase its efficiency when converting low-grade heat. The developed design of the engine does not have a displacer rod, which provides better sealing and reduces mechanical friction losses. Synchronization of the piston and the displacer movement is ensured by the permanent magnets interaction. The analysis of the results of computer simulation of the PV diagram with an increased diameter of the displacer in relation to the piston diameter plays a positive role in increasing the efficiency and power of the engine. Increasing the diameter of the displacer also leads to increasing the area of the PV diagram and its approach to the ideal thermal Stirling cycle. The simulation results show that increasing the diameter of the displacer above 17/1 does not lead to increasing the area of the PV diagram, and with a larger ratio, on the contrary, it reduces the parameters of the engine efficiency. Further increasing the diameter of the displacer is not advisable in terms of technical and economic ratios. The proposed engine with external heat supply is capable of converting heat from geothermal or industrial wastewater, as well as heated water using a solar collector.