COP-restricting Parameter Analysis of Centrifugal Refrigerating Units

摘要：

The method of variance analysis was used to analyze the effects of four parameters,i.e.the opening degree of guide vane,the proportion of actual operating load,the outlet temperature of cold water,and the outdoor wet-bulb temperature,on the coefficient of performance (COP)of centrifugal refrigerating units.When the confidence level is set as 95% and 99%respectively,the results of single-factor variance analysis of the above four parameters show that the test statistic F of the opening degree of guide vane is higher than its critical value F0.01 (r-1,n-r) ,and the F of the proportion of actual operating load and the outlet temperature of cold water are higher than their own critical value F005 (r-1,n-r) ,which proves that their impacts on the COP are significant,while the impact of outdoor wet-bulb temperature is not significant.The results of two-factor variance analysis of the outlet temperature of cold water and outdoor wet-bulb temperature show that their interaction has remarkable impacts on the COP.The actual COP value of centrifugal refrigerating units can increase by 6.885%averagely under the condition of the invariable refrigerating capacity after adjustment according to the analytical results.

关键词： Refrigerating units COP Single-factor variance analysis Two-factor variance analysis

作者: Xinyu Li Xing Jin Jie Chen

作者单位: Textile College Tianjin Polytechnic University,Tianjin,China

会议类型: 国际会议

会议名称: The First International Conference on Building Energy and Environment(第一届建筑能源与环境国际会议)

会议地点: 大连

会议语种:英文

页码: 2193-2200

在线出版日期: 2008-07-01（万方平台首次上网日期，不代表论文的发表时间）