科研之友
微信
新浪微博
Facebook
分享链接
摘要
In conventional heat-driven Stirling-based combined cooling and power (CCP) systems, the system performance is highly sensitive to linear alternator parameters. Besides, an efficient coupling between the engine and the cooler is difficult to achieve. To address these issues, a novel heatdriven Stirling-based CCP system is proposed in this work. The proposed system uses a resonance tube and a linear alternator to realize an efficient impedance matching, acoustic power distribution, and transmission among a free-piston Stirling engine and a free-piston Stirling cooler. Based on the thermoacoustic theory and commercial software Sage, the proposed system is numerically investigated. The results show that when the heating temperature is 833 K and the charged pressure of helium gas is 5 MPa, the proposed system can provide a cooling capacity of 1000 W at 110 K and an electric power of 800 W with a global exergy efficiency of 29.4%. The engine, the cooler, and the linear alternator can realize an efficient power matching. Besides, the change of the linear alternator's electrical power output has little effect on the system efficiency.
- 单位
