热声发电系统中直线发电机工作特性研究  

Study on the Working Characteristics of Linear Alternator in Thermoacoustic Power Generation System

作　　者：孙大明[1] 赵益涛[1] 王凯[1] 郭轶楠[1] 屈稳太[2] 邱利民[1] 

机构地区：[1]浙江大学制冷与低温研究所,浙江杭州310027 [2]浙江大学宁波理工学院,浙江宁波315100

出　　处：《工程热物理学报》2013年第7期1225-1228,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划项目(No.2010CB227303);国家自然科学基金(No.61077035)

摘　　要：热声发电是一种新型的发电技术,可以有效利用太阳能、工业废热等低品位能源。基于线性热声理论建立了热声发电系统中直线发电机的物理模型,对其声电转换参数进行了模拟计算。设计并搭建了热声发电系统用直线发电机的实验台,通过测量发电机活塞位移、入口压力、背腔压力、输出电功等参数,对发电机的运行特性特别是声电转换效率进行了研究,初步证明了理论模型的可靠性。此外,还提出了一种简单测算直线发电机效率的有效方法。Thernioacoustic power generation is a new type of technology,which can use low-grade thermal energy,such as solar energy and industrial waste heat,effectively.A physical model of a linear alternator is built based on linear thernioacoustic theory,and its acoustic-electric conversion parameters are numerically solved.An experimental testing system for the linear alternator is then designed and constructed.Working characteristics of the linear alternator,especially the acousticelectric efficiency,are studied through the measurements of piston displacement,inlet pressure,back cavity pressure,and output electric power.Experimental results preliminarily verify the validity of the theoretical model.Furthermore,a simple and effective method for evaluating the acoustic-electric efficiency of a linear alternator is proposed.

关 键 词：热声 直线发电机 声电转换 

分 类 号：TM615[电气工程—电力系统及自动化]