Optimization and comparison of thermodynamic performance of a double-acting thermoacoustic heat engine with helium and nitrogen gases
A double-acting thermoacoustic heat engine is a novel power system.Typically,it includes three identical thermoacoustic conversion cores which are able to convert heat into acoustical power.In such a system,the working gas is critical to the thermodynamic performance of the double-acting thermoacoustic heat engine.In this paper,the optimization and comparison of a double-acting thermoacoustic heat engine by using helium and nitrogen gases have been conducted.In the simulation,the same operating conditions including hot-end and cold-end temperatures(650℃/30℃),mean working pressure,and compression and expansion volumes,and the regenerator,heat exchanger and other thermodynamic components were optimized.The simulation results show that helium gas gives better performance,but nitrogen gas also has an encouraging and acceptable thermal efficiency.Typically,the helium gas can reach a relative Carnot efficiency of~68%,whereas that of nitrogen of~58%with roughly equal output electric power.Thus,it is expected that the reported results may provide guidance for designing the two power systems.
Different Working Gas Optimization Double-acting Thermoacoustic Heat Engine
Limin Zhang Yanyan Chen Ercang Luo
The Key Laboratory of Cryogenics,Chinese Academy of Sciences,Beijing,China;University of Chinese Aca The Key Laboratory of Cryogenics,Chinese Academy of Sciences,Beijing,China
国际会议
桂林
英文
1-7
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）