化工学报2016，Vol.5Issue(5)：1830-1836,7.DOI:10.11949/j.issn.0438-1157.20151155
自复叠制冷系统4种组分配比性能
Effect of four components ratios on performance of auto-refrigerating cascade system
摘要
Abstract
An auto-refrigerating cascade cycle has some unique advantages for small refrigeration units, for which it has a wide range of operation temperatures from 77 K for nitrogen liquefaction to 230 K for conventional refrigeration. For the three-level auto-refrigenerating cascade system, effect of the components ratios of non-azeotropic mixture as a medium on the performances was investigated. Through the experimental comparisons of the performance of compressor and the cooling performance of evaporator, refrigerant mixtures of R600a, R23 and R14 with four ratios of 35/35/30, 35/30/35, 30/35/35 and 35/25/40 were designed, of which all the conditions of evaporator were approximate. The evaporation temperature for the ratio of 35/30/35 was lower than others. For this auto-refrigerating cascade system, its evaporator temperature can be as stable as down to 175 K under conditions of 60 W cooling load and 180 K of designed evaporation temperature. Based on the experimental study on the performances of the two compositions under different cooling loads, the highest COP values of 8.47% and 14.4% for the ratios of 35/30/35 and 35/35/30 were achieved, respectively.关键词
自复叠制冷系统/R600a/R23/R14/组分配比/非共沸/混合工质Key words
auto-refrigerating cascade system/R600a/R23/R14/composition ratio/non-azeotropic/mixtures分类
通用工业技术引用本文复制引用
芮胜军,张华,董彬,梁坤峰..自复叠制冷系统4种组分配比性能[J].化工学报,2016,5(5):1830-1836,7.基金项目
国家自然科学基金项目(51176124) （51176124）
河南省重点攻关项目( 152102210279 ) （ 152102210279 ）
河南省高等学校重点科研项目( 15A470001 , 14A470013) （ 15A470001 , 14A470013）
河南科技大学青年科学基金项目(2015QN014).supported by the National Natural Science Foundation of China (51176124), the Key Projects of Henan Province (152102210279), the Outstanding Scientific Research Project of Henan Colleges and Universities (15A470001, 14A470013) and the Youth Science Foundation of Henan University of Science and Technology (2015QN014). （2015QN014）
