Acoustic impedance characteristics of linear compressors

作     者：Zhi-hua GAN Long-yi WANG Sheng-ying ZHAO Yu-jing SONG Wei-wei WANG Yi-nong WU Zhi-hua GAN 1 , Long-yi WANG 1 , Sheng-ying ZHAO 2 , Yu-jing SONG 1 , Wei-wei WANG 1 , Yi-nong WU 3 ( 1 Institute of Cryogenics and Refrigeration, Zhejiang University, Hangzhou 310027, China) ( 2 School of Information and Electrical Engineering, Zhejiang University City College, Hangzhou 310015, China) ( 3 Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China)

作者机构：Institute of Cryogenics and Refrigeration Zhejiang University School of Information and Electrical Engineering Zhejiang University City College Shanghai Institute of Technical Physics Chinese Academy of Sciences 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2013年第14卷第7期

页      面：494-503页

核心收录：

学科分类：080705[工学-制冷及低温工程] 0810[工学-信息与通信工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (No. 51176165) the Open Project Program of the Key Laboratory of Infrared Imaging Materials and Detectors (No. IIMDKFJJ-11-07), China 

主　　题：Linear compressor Acoustic impedance Resistive-capacitive (RC) load 

摘      要：The acoustic field of a linear compressor serves to deliver the compression work to the load, such as the connected cold head of a cryocooler; it plays an equivalently important role as the electrical and mechanical parts, especially in the impedance match issue. This paper studies the acoustic impedance characteristics of a linear compressor. The parameters including the current, the piston displacement, the pressure amplitude, the electrical power dissipation, the power factor, the pressure-volumetric (PV) power delivered, and the efficiency are theoretically and experimentally investigated. Different from previous theoretical studies, optimization for the operations away from the resonance is also included. More general optimization results imply relevance between thermoacoustic engines and linear compressors. The predicted results are validated by the experiments performed on a linear compressor with an adjustable resistive-capacitive (RC) acoustic load. The comparisons between the calculations and the measurements are presented and analyzed. The results provide deeper insight into the mechanism of the linear compressor and the impedance match in a cryocooler system.