本文通过理论计算对CO_2/DME混合制冷剂替代CO_2的跨临界制冷循环特性进行了分析,结果表明:CO_2/DME混合制冷剂的质量配比范围为90/10～100/0时,可实现混合制冷剂的直接充灌.在相同的工况下,CO_2/DME跨临界制冷循环的最优高压侧压力降低了3 MPa,制冷系数提高4.3%;过热度对循环性能的影响,纯质CO_2要大于混合工质CO_2/DME.
The performance of a transcritical refrigeration cycle with an alternative refrigerant CO_2/DME for CO_2 is theoretically analyzed and calculated.The results indicated that the mixture refrigerant CO_2/DME is filled directly without changing a refrigeration system with a mass fraction of DME ranging from 0% to 10%.In the similar conditions,the CO_2/DME lowers the discharge pressures by about 3 MPa,and the coefIlcient of performance(COP)iS increased by about 4.3 percent.The influence of superheat on a pure refrigerant CO_2 is larger than that of the mixture refrigerant CO_2/DME.
参考文献
| [1] | Kim SG;Kim MS .Experimental and Simulation on the Performance of Anautocascazie Refrigeration System Using Carbon Dioxide as a Refrigerant[J].International Journal of Refrigeration-Revue Internationale du Froid,2002,25:1093-1101. |
| [2] | Kim JH;Cho JM;Lee IH et al.Circulation Concentration of CO_2/Propane Mixtures and the Effect of Their Charge on the Cooling Performance in an Air-Conditioning System[J].International Journal of Refrigeration-Revue Internationale du Froid,2007,30:43-49. |
| [3] | 何茂刚,李铁辰,刘志刚.二甲醚作为冰箱制冷剂的实验研究[J].西安交通大学学报,2004(03):221-225. |
| [4] | 刘敬辉,陈江平,鲁雪生,陈芝久.二甲醚制冷性能分析及其lgP-h图[J].能源技术,2004(06):238-242. |
| [5] | Koyama S;Takato N;Kuwahara K.Experimental Study on the Performance of a Refrigerant Mixture CO_2/DME System[A].北京,2007 |
| [6] | Hasan M M .Afroz.Heat Transfer Coefficients and Pressure Drops During In-Tube Condensation of CO_2/dme Mixture Refrigerant[J].International Journal of Refrigeration-Revue Internationale du Froid,2008,31(08):1458-1466. |
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