制约离心式制冷机组COP值的参数分析  

Parameters Restricting the Coefficient of Performance of Centrifugal Refrigerating Units

作　　者：李新禹[1] 金星[1] 陈杰[1] 

机构地区：[1]天津工业大学建筑环境系,天津300160

出　　处：《土木建筑与环境工程》2009年第1期103-109,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：天津市教委科技发展基金资助项目(20041205)

摘　　要：利用方差分析方法分析了制冷机组实际运行负荷比例、机组导叶开度、冷冻水出口温度以及室外空气相对湿度对离心式制冷机组COP值的影响。当置信概率分别取95%和99%时,一元方差分析表明,机组导叶开度的检验统计量F值高于临界值F0.01(r-1,n-r),证明其对机组COP影响十分显著;实际运行负荷比例、冷冻水出口温度的检验统计量F值高于临界值F0.05(r-1,n-r),说明对机组COP影响显著;室外空气相对湿度的检验统计量F值低于临界值F0.05(r-1,n-r),则对制冷机组COP影响不显著。同时对冷冻水出口温度和室外空气相对湿度进行二元方差分析表明,两者交互作用的检验统计量F值高于临界值F0.01((r-1)(s-1),rs(c-1)),则证明两者交互作用制冷机组COP影响显著。依据分析结果调整机组运行参数,在制冷量不变的情况下,机组运行的COP值平均提高6.885%。We used the variance analysis method to analyze the effects of the proportion of the actual operated load, the pulse-on degree of guide baffles, the temperature of cold water of the outlet, and outdoor relative humidity 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 statisticF of the pulse-on degree of guide baffles is higher than its critical value F0.01 （r-1 ,n-r）, which establishes that its influence on the COP is quite remarkable. The test statistic F of the proportion of the actual operated load and the outlet temperature of cold water are higher than their own critical value F0.0s （r- 1, n- r）, which shows that their influence on the COP is remarkable. The test statistic F of outdoor relative humidity is lower than its critical value F0.05 （r-1 ,n- r）, which demonstrates that its influence on the COP is unremarkable. The results of the two-factor variance analysis of the cold water outlet temperature and outdoor relative humidity show that the test statistic F of their interaction is higher than its critical value F0.01 （r-1,n-r）, which indicates that influence of their interaction on the COP is very remarkable. The actual COP value of centrifugal refrigerating units can increase by 6. 885% in average on the condition of the invariable refrigerating capacity after adjustment according to the analytical results .

关 键 词：制冷机组 COP 方差分析 

分 类 号：TB494[一般工业技术]