可用于热声发电的曲柄连杆式换能器阻抗特性理论研究

发布时间：2018-05-19 15:41

  本文选题：热声发电 + 曲柄连杆　； 参考：《工程热物理学报》2017年11期

【摘要】：热声发电系统具有高效、可靠、结构简单及外燃等独特优势,在煤层气发电、太阳能发电及工业余热利用等领域应用前景广阔。本文针对用于热声发电的曲柄连杆式换能器,建立了物理模型,讨论了活塞质量、转动惯量及电路负载对换能器阻抗特性的影响,表明固定频率、振幅的压力波驱动下,由于曲柄连杆式换能器行程固定,其阻抗幅值不变,而相位角随负载电阻减小而减小,阻抗实部值相应增大。最后根据换能器阻抗特性,简化模拟了采用曲柄连杆式换能器的行波热声发电系统DeltaEC模型,模拟显示在充气压力3.16 MPa、热源温度650℃时,系统可输出约645.4 W电功(热电效率16.6%),表明此换能器用于大功率、低成本热声发电的优势。本研究为曲柄连杆式换能器与大功率热声热机高效匹配的应用提供了理论基础。
[Abstract]:Thermoacoustic power generation system has many unique advantages, such as high efficiency, reliability, simple structure and external combustion. It has a broad application prospect in the fields of coal-bed methane power generation, solar power generation and industrial waste heat utilization. In this paper, the physical model of crank connecting rod transducer for thermoacoustic power generation is established. The effects of piston mass, moment of inertia and circuit load on the impedance characteristics of the transducer are discussed. Because the stroke of crank and connecting rod transducer is fixed, the impedance amplitude is constant, while the phase angle decreases with the decrease of load resistance, and the real part of impedance increases accordingly. Finally, according to the impedance characteristics of the transducer, the DeltaEC model of the traveling wave thermoacoustic generation system using crank and connecting rod transducer is simplified. The simulation shows that the temperature of the heat source is 650 鈩，

本文编号：1910669