| 摘要: |
| 对于多级自动复叠制冷系统，混合制冷工质的选取和组分配比具有重要的影响作用。针对四级自动复叠制冷系统，运用REFPROP8.0软件建立了混合工质种类选择及其配比研究的理论模拟方法，通过分析比较混合工质的饱和压力、蒸发温度，模拟出混合工质组分和配比：R600a/R23/R14/R740=45/21/19/16，充入该混合工质配比进行实验研究，获得了-150℃的设计柜温。研究表明，该混合工质理论模拟方法，能够有效指导实验研究，取得理想的制冷温度。 |
| 关键词: 自动复叠制冷 混合工质 模拟计算 配比 |
| DOI： |
| Received:October 15, 2012 |
| 基金项目:国家自然科学基金（51176124)资助项目 |
|
| Study on Mixed Refrigerants Selecting and Matching of a Four Stage Auto-cascade Refrigeration |
|
Zhao Wei1, Zhang Hua1, Liu Ruixi1, Xiao Chuanjing2, Zhang Shuchun1
|
| (1.Institute of Refrigeration and Cryogenics, University of Shanghai for Science and Technology;2.Emerson Climate Technologies Co., Ltd.) |
| Abstract: |
| The selection and mixture ratio of the mixed refrigerants are important to a multistage auto-cascade refrigeration system. A simulation method was found for the mixed refrigerants selection and ratio calculation by using the commercial software REFPROP8.0. The saturation pressure and evaporation temperature of the auto-cascade refrigeration system were compared to get the optimal mixture ratio of the mixed refrigerants, that is R600a/R23/R14/R740=45/21/19/16. The temperature of freezer was -150℃ at this mixed refrigerants and the mixture ratio. The results show that the research of multistage auto-cascade refrigeration system can be guided by this simulation method and the expected temperature was got. |
| Key words: auto-cascade refrigeration mixed refrigerants simulation mixture ratio |
