| 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联合研发的大功率单级活塞式二氧化碳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1000 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1500 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%。 |
| 关键词: 压缩机 二氧化碳 效率 压缩比 转速 |
| DOI： |
|
|
| 基金项目: |
|
| Experimental Investigation of High-power R744 Compressor Efficiencies at Varied Revolutions |
| Han Yi,Wu Jingyi,Hafner Armin |
| (Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University;Norwegian University of Science and Technology) |
| Abstract: |
| The performance of a new 100-kW single-stage R744 piston compressor developed by Norwegian University of Science and Technology 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. |
| Key words: compressor R744 efficiency pressure ratio revolution |
