流体机械2023，Vol.51Issue(12)：71-80,10.DOI:10.3969/j.issn.1005-0329.2023.12.011
R410A小型制冷螺杆压缩机与涡旋压缩机的理论性能比较
Theoretical performance comparison of R410A small refrigeration screw compressors and scroll compressors
摘要
Abstract
In order to explore the potential,advantages and disadvantages of the miniaturization of screw refrigeration compressors,a scroll compressor with the same theoretical displacement and speed was selected for theoretical design.Through normalization analysis,the quantitative evaluation standard of the geometric performance of screw compressor and scroll compressor was established.And the exergy analysis model was used to analyze the leakage exergy loss of screw and scroll compressors.A unified thermodynamic model was established to analyze the effects of clearance,internal volume ratio and speed on thermodynamic performance.The study shows that the influence of the internal volume ratio design on the adiabatic efficiency of the scroll compressor is significant,while the influence on the screw compressor efficiency is not significant.The area of the exhaust orifice of the scroll compressor is much smaller than that of the screw compressor,and its exhaust power loss is higher than that of the screw compressor.Under the same clearance,the relative leakage amount and leakage exergy loss of the screw compressor is higher than that of scroll compressor.For every 0.01 mm increase in clearance,the adiabatic efficiency of scroll compressor decreases by 6%,and the adiabatic efficiency of screw compressor decreases by 11%.When the rated speed is 3000 r/min at the same speed,the adiabatic efficiency and volumetric efficiency of the screw compressor are 6%and 13.6%lower than those of the scroll compressor,respectively.When the rotating speed is 2250,1500 and 750 r/min,the adiabatic efficiency of the screw compressor is 9%,13%and 26%lower than that of the scroll compressor.In order to improve the performance of the small screw refrigeration compressor,it should be designed for high speed.关键词
螺杆压缩机/涡旋压缩机/泄漏特性/热力学特性/㶲分析Key words
screw compressor/scroll compressor/leakage characteristics/thermodynamic characteristics/exergy analysis分类
机械制造引用本文复制引用
张治平,马凯,李丹童,何志龙..R410A小型制冷螺杆压缩机与涡旋压缩机的理论性能比较[J].流体机械,2023,51(12):71-80,10.基金项目
国家自然科学基金项目(51976148) （51976148）
空调设备及系统运行节能国家重点实验室开放基金项目(ACSKL2021KT04) （ACSKL2021KT04）
