Analysis of solenoid based linear compressor for household refrigerator |
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| Affiliation: | 1. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, Shanghai 200083, China;2. University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China;1. Politechnika Krakowska M-5, PL-31-864 Krakow, al. Jana Pawla II 37, Poland;2. Institute of Nuclear Physics Polish Academy of Sciences, PL-31-342 Krakow, Radzikowskiego 152, Poland;1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China;2. Shanghai Institute of Technical Physics, Chinese Academy of Science, 500 Yutian Road, Shanghai 200083, China;1. Department of Mechanical Engineering, Graduate School, Kongju National University, Cheonan, Chungnam 330-717, Republic of Korea;2. Department of Mechanical and Automotive Engineering, Kongju National University, Cheonan, Chungnam 330-717, Republic of Korea |
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| Abstract: | This article presents the analytical modeling of an oil-free solenoid actuator based linear compressor used in household refrigerators. The stator coil was excited with the pulse width modulated signal which caused linear oscillations in the armature using helical spring. Dynamic characteristics of the linear compressor were studied analytically considering the nonlinearity of the gas and electromagnetic force. The system dynamic models were validated with the finite element simulation as well as a specially designed experimental setup. Frequency response functions of stroke to current as well as pressure to current ratios were generated to evaluate the effect of excitation frequency on the compressor performance. The higher efficiency of the solenoid actuator was achieved when excited at the natural frequency. The results show that the natural frequency of the designed system is around 19 Hz and the work done in a cycle is approximately 1.3 J. Additionally, 47% isentropic and 87% electrical efficiency were achieved. |
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