摘要
本文在不同压力和转速工况下,对一台由挪威科技大学与Sintef联合研发的100 k W大功率单级活塞式CO_2制冷压缩机进行了实验测试,得出压缩机效率、容积效率以及油循环率随压缩比和转速的变化曲线,以及效率最优时各参数的范围。结果表明:当压缩比为2.1、转速为2 500 r/min时,油循环率达到最大值2.84%;当压缩比为1.88,转速为1 000 r/min时,容积效率达到最大值85.8%;当压缩比为1.5~2.5,转速约为1 500 r/min时,压缩机效率最优;当转速为1 500 r/min,压缩比为2.0时,可达到最大值79.1%。针对压缩机效率的实验数据进行了数学拟合,并与两台同类压缩机的产品效率作对比分析,结果表明:大功率压缩机当压缩比为1.5~3.2时的效率比同类压缩机约高11.5%。
The performance of a new 100 kW single-stage CO2 piston compressor developed by Norwegian University of Science and Tech- nology and Sintef is investigated in this paper. The oil circulation, volumetric efficiency, and overall efficiency are tested as an overview of the compressor performance. Experimental results with a pressure-ratio range from 1.9 to 4 under compressor revolutions of 1000 to 2500 r/min are reported. The results show that the highest oil circulation rate is 2. 84%, acquired with a pressure ratio of 2. 1 and a revolution of 2500 r/min, while the volumetric efficiency reaches a maximum value of 85.8% as a pressure ratio of 1.88 and revolution of 1000 r/min are reached. Optimum overall efficiencies of this compressor can be achieved in a pressure-ratio range from 1.5 to 2. 5 and a compressor revolution near 1500 r/min. Specifically, the maximum value is obtained up to 79. 1% with a revolution of 1500 r/min and a pressure ratio of 2.0. The fitted overall efficiency results are compared with the efficiency data from two commensurate products in a catalog. This illustrates that the overall efficiency of the new compressor is about 11.5% higher than the others when the pressure ratio ranges from 1.5 to 3.2.
出处
《制冷学报》
CAS
CSCD
北大核心
2017年第3期7-12,共6页
Journal of Refrigeration
关键词
压缩机
CO2
效率
压缩比
转速
compressor
CO2
efficiency
pressure ratio
revolution
