余热驱动热耦合多级自由活塞斯特林热电联供系统研究  

Research on Thermal Coupling Multi-Stage Free Piston Stirling Cogeneration System Driven by Waste Heat

作　　者：陈远航 余国瑶[1,3] 江志杰 孙浩杰 马英 成阳斌 朱顺敏 罗二仓 CHEN Yuanhang;YU Guoyao;JIANG Zhijie;SUN Haojie;MA Ying;CHENG Yangbin;ZHU Shunmin;LUO Ercang(CAS Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Beijing 100190,China;The University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Optical Physics and Engineering Technology,Qilu Zhongke,Jinan 251000,China)

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院大学,北京100049 [3]齐鲁中科光物理与工程技术研究院,济南251000

出　　处：《工程热物理学报》2023年第11期2948-2955,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金面上项目(No.51876214)。

摘　　要：我国工业余热资源丰富,尤其是中低温余热具有巨大的回收利用潜力。本文提出采用热耦合多级自由活塞斯特林发电机来构建余热回收利用系统,可有效拓宽余热利用温度范围,减小余热热源传热损失。首先基于热声理论,从声阻抗角度计算考察了单级自由活塞斯特林热电联供系统在变温和变充气压力等工况下的性能;然后对一台三级自由活塞斯特林热电联供系统进行解耦计算,分别考察了供水温度、单级加热量、工作压力等因素对系统性能的影响;最后开展了实验研究,在420/350/300℃热端温度及22/22/18 kW加热量下获得自由活塞斯特林热电联产系统净输出电功10.09 kW,供热量45.29 kW,对应总热电效率为16.27%,综合热利用率为89.32%,各级相对卡诺效率分别为30.90%、32.10%、36.08%,展现出重要的应用前景。Industrial waste heat resources are abundant in our country,especially medium-and low-temperature waste heat has great potential for recovery and utilization.In this paper,a thermal coupling multi-stage free piston Stirling generator was proposed to construct a waste heat recovery system,which can effectively broaden the temperature range of waste heat utilization and reduce the heat transfer loss.Firstly,based on thermoacoustic theory,the performance of a single-stage free piston Stirling cogeneration system under varying temperatures and mean pressures was investigated from the perspective of acoustic impedance.Then,a three-stage free piston Stirling combined heat and power system was decoupled,and the effects of water supply temperature,input heating power and mean pressure on the system performance were investigated respectively.Finally,the experimental study was carried out.Under the hot end temperature of 420/350/300℃ and 22/22/18 kW heating power,the electric power output of the free piston Stirling cogeneration system is 10.09 kW,and the supplied heat is 45.29 kW to the recirculating water.The corresponding total thermoelectric efficiency is 16.27%,and the overall heat utilization rate is 89.32%.The relative Carnot efficiency of the stages is 30.90%,32.10%and 36.08%respectively,showing important application prospects.

关 键 词：余热利用 热声 多级自由活塞斯特林 热电联供 

分 类 号：TK115[动力工程及工程热物理—热能工程]