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时间:2020-03-27
《氨水溶液密度计算与实验分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、上海理工大学学报第35卷第5期J.UniversityofShanghaiforScienceandTechnologyVo1.35No.52013文章编号:1007—6735(2013)05—0430—05氨水溶液密度计算与实验分析陈小砖,柳建华,张良,刘旗,张美鑫(1.上海理工大学能源与动力工程学院,上海200093;2.河南理工大学机械与动力工程学院,焦作454003)摘要:对文献中常用的4种方程,P—R方程、Rackett方程、Campbell改进的Rackett方程和Yen.Woods关系式,利用Matl
2、ab7.0软件分别计算了氨和水纯组分的饱和液体密度.计算结果表明,Campbell改进的Rackett方程计算精度最高,对于氨其平均误差为0.38%,最大误差为0.41%;对于水其平均误差为0.58%,最大误差为1.01%.YenWoods关系式计算精度比较高,对于氨其平均误差为0.73%,最大误差为1.32%;对于水其平均误差为1.38%,最大误差为3.59%.根据溶液的混合性质和超额性质,提出计算氨水混合溶液密度的公式.同时介绍了氨水溶液密度的实验测量原理及仪器,该方法可以验证密度公式的计算精度.关键词:氨;水
3、;密度;混合;溶液中图分类号:TB611文献标志码:ADensityCalculationandExperimentalAnalysisofAmmoniaWaterSolutionsCHENXiao-zhuan,LIUJian-hua,ZHANGLiang,LIUQi,ZHANGMei.xin(1.SchoolofD剔andPower西,UniversityofShanghaiforScienceandTechnology,Shanghai200093,China2.SchoolofMechanicalandPow
4、erEngineering,HenanPolytechnicUniversity,Jiaozuo454003,China)Abstract:Inordertocalculatenumericallythecoefficientofperformanceandcarryoutanaloguecomputationonammonia—waterabsorptionrefrigerationcycle,itisnecessarytoseekoutalotofpreciseequationsthatcanbeusedtoc
5、alculatethedensityofammonia—watersolutions.ThedensityofsaturatedliquidofammoniaandwaterwascalculatedadoptingfourtypesofequationsbythehelpofMatlab7.0software.Duetopolarmaterialpropertiesaboutammoniaandwater。itiSdifficulttofindanaccurateequationusedtocalculateth
6、edensity.Withregardtoammoniasaturated1iquiddensity,theresultofRackettequationimprovedbyCampbellisthemostpreciseatthetemperaturerangefrom一30℃to55℃withtheoverallaveragerelativeerrorof0.38%andmaximumrelativeerrorof0.41%.Concerningwatersaturatedliquiddensity.thepe
7、rformanceofRackettequationimprovedbyCampbellisthebestatthetemperaturerangefrom6℃toi00℃withtheoverallaveragerelativeerrorof0.58%andmaximumrelativeerrorofi.01%.TheYen_WoodscorrelationiSalsoanexcellentequation.Theoverallaveragerelativeerrorandmaximumerroraboutamm
8、oniais0.73%and1.32%respectively.Withrespecttowater。theoverallaveragerelativeerrorandmaximumerroriS1.38%and3.59%,respectively.Accordingtothemixruleand收稿日期2013——03——09基金项目上海市重点学科建设资助
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