P-V图和阀片运动图在冰箱压缩机性能评价中的应用
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摘要
通过建立新的实验平台,准确测量压缩机各腔体内的气体压力和吸排气阀片的升程量,获取真实的P-V图和阀片运动图。对压缩机P-V图和阀片运动图进行同步研究和分析,得到阀片动作与压缩机内部工作过程的耦合关系,从而为压缩机优化提供方法。实验数据表明:在ASHRAE工况下,该款压缩机循环功耗为66.825 W,其中排气压力损失功耗占比为4.254%,吸气压力损失功耗占比为1.2%,吸气阀片位移为2.148 mm,排气阀片位移为0.825 mm。对压缩机吸排气阀片延时现象进行了分析。
By establishing a new experimental platform, the gas pressures in each chamber of the compressors and the movements of the suction and exhaust valves were measured, and the true P-V diagram and valve motion diagram were obtained. By studying and analyzing P-V diagram and valve motion diagram of the compressors synchronously, the coupling relationship between valve actions and internal working processes of compressors was obtained, which provided a method for compressor optimization. The experimental data show that under the working conditions of ASHRAE, the compressor cycle power consumption is as 66.825 W, the percentage of the loss of exhaust pressure consumption is 4.254%, the percentage of the loss of suction pressure consumption is 1.2%, the displacement of suction valve plate is as 2.148 mm, and the displacement of the exhaust valve plate is as 0.825 mm. The phenomena of the delay of suction and exhaust valves of compressor were analyzed.
By establishing a new experimental platform, the gas pressures in each chamber of the compressors and the movements of the suction and exhaust valves were measured, and the true P-V diagram and valve motion diagram were obtained. By studying and analyzing P-V diagram and valve motion diagram of the compressors synchronously, the coupling relationship between valve actions and internal working processes of compressors was obtained, which provided a method for compressor optimization. The experimental data show that under the working conditions of ASHRAE, the compressor cycle power consumption is as 66.825 W, the percentage of the loss of exhaust pressure consumption is 4.254%, the percentage of the loss of suction pressure consumption is 1.2%, the displacement of suction valve plate is as 2.148 mm, and the displacement of the exhaust valve plate is as 0.825 mm. The phenomena of the delay of suction and exhaust valves of compressor were analyzed.
引文
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[2] 马一太,刘忠彦,李敏霞.容积式压缩机电效率分析[J]﹒制冷学报,2013,34(3):1-7.MA Yitai,LIU Zhongyan,LI Minxia.Analysis of Electrical Efficiency for Positive Displacement Refrigerant Compressor [J].Journal of Refrigeration,2013,34(3):1-7.
[3] 李建民,王勇.P-V图在高能效压缩机开发中的应用[J].家电科技,2009(13):51-53.LI Jianmin,WANG Yong.Application of P-V Diagram in the Development of High Energy Efficiency Compressor[J].China Appliance Technology,2009 (13):51-53.
[4] PENZ C A,FLESCH C A,NASSAR S M,et al.Fuzzy Bayesian Network for Refrigeration Compressor Performance Prediction and Test Time Reduction[J].Expert Systems with Application,2012,39 (4):4268-4273.
[5] TENISSARA N,THEPA S,MONYAKUL V .Performance Study of a Small-single Piston Expander Using Compressed Air as Working Fluid[J].Energy Procedia,2017,138:610-615.
[6] 林梅,吴正业.压缩机自动阀[M].2版.西安:西安交通大学大学出版社,1991.LIN Mei,WU Zhengye.Compressor Automatic Valve[M].2nd ed.Xi’an:Xi’an Jiaotong University Press,1991.
[7] 郭鹏,段雪涛.容积式压缩机内部热力过程试验台的研制[J]﹒低温与超导,2013,41(7):73-76.GUO Peng,DUAN Xuetao.Design of Test Platform for Internal Thermal Process in the Positive Displacement Compressor[J].Cryogenics and Superconductivity,2013,41(7):73-76.
[8] 张书宁,赵文钊,程中甫.冰箱压缩机P-V图测试方法及应用研究[J]﹒家电科技,2015(4):50-53.ZHANG Shuning,ZHAO Wenzhao,CHENG Zhongfu.The Testing Method and Application of P-V Diagram on the Refrigerator Compressor[J].China Appliance Technology,2015(4):50-53.
[9] 朱金松,杨骅.冰箱压缩机P-V指示图测试平台的开发[J]﹒家电科技,2012(8):60-62.ZHU Jinsong,YANG Hua.The Development of Refrigerator Compressor P-V Indicator Diagram Test Platform[J].China Appliance Technology,2012(8):60-62.
[10] WANG J D,GAO Y Q,ZHAO H Y,et al.Sectional Normalization and Recognization on the PV-diagram of Reciprocating Compressor[J].Journal of Measurements in Engineering,2015,3(2):35-41.
[11] PICHLER K,LUGHOFER E,PICHLER M,et al.Detecting Cracks in Reciprocating Compressor Valves Using Pattern Recognition in the PV Diagram[J].Pattern Analysis and Application,2015,18(2):461-472.
[12] PICHLER K,LUGHOFER E,PICHLER M,et al.Detecting Broken Reciprocating Compressor Valves in PV Diagrams of Different Valve Types[C]// 2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics.Wollongong,2013:1625-1630.
[13] 陈楠.活塞式制冷压缩机PV图测试系统研究[D]﹒杭州:浙江工业大学,2011.CHEN Nan.The Research of PV Diagram Testing System for Reciprocating Refrigerating Compressor[D].Hangzhou:Zhejiang University of Technology,2011.