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《单级氨水吸收式制冷机试验台性能研究.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、56FLUIDMACHINERYVo1.39,No.5,2010文章编号:1005----0329(2010)04—OO56—07单级氨水吸收式制冷机试验台性能研究孔丁峰,柳建华。张良,方志云(上海理工大学,上海200093)摘要:针对氨水吸收式制冷机在环保、节能、无噪音等方面的优点,建立了1台单级式氨水吸收式试验样机。应用热量、质量守恒方程对试验样机的不同部件分别建立热力学模型,进行了单级氨水吸收式制冷机性能特性的研究。计算结果与实测数据进行了比较,结果表明:试验样机在发生压力1.17MPa,发生温度89%,冷却水进口温度29.7℃工况下稳定运行的基础上,性能系数实际值在0.37~0.4
2、5之间,与设计的性能系数0.47相比,相对误差为5%一21%。同时进行了系统部件匹配性能分析及变工况下的性能分析。试验表明筛板塔板数越多越有利于提高精馏塔的分离效果,试验过程中板式换热器平均传热温差30.13℃。当冷却水进口温度保持不变,冷却水量加大10%时,对各部件的性能影响较大,系统制冷量下降4%左右。关键词:吸收式;氨一水;性能;试验中图分类号:TB651文献标识码:Adoi:10.3969/j.issn.1005—0329.2010.05.014EfectofDiferentConditionsonPerformanceofaSingleStageAmmonia-waterAbso
3、rptionChillerKONGDing—feng,LIUJian—hua,ZHANGLiang,FANGZhi—yun(UniversityofShanghaiforScienceandTechnology,Shanghai200093,China)Abstract~Theammonia—waterabsorptionchillersarethermallydrivendevicesproducingacoolingeffect.Itcanbeoperatedwithoutanyuseofelectricalormechanical,energy.Theadvantageofabsor
4、ptionchillersispreciselythattheycanutilizelowgradeenergy.Anexperimentalprototypeofasinglestageammonia—waterabsorptionchillerwithcompletecondensationwasdesigned,builtandtested.Thethermodynamicmodelsofthecomponents,basedontheFirstLawshavebeenassembledSOastoquantify,thesimultaneousheatandmasstransfer
5、processesoccurringwithintheexchangers.Calculatedresuhswerecomparedwithexperi—mentaldata.Inthecase.theresultsshowthattheactualCOPofprototypeliesbetween0.37and0.45forgeneratorpressureof1.17MPa,generatortemperatureof89℃,coolingwaterinlettemperatureof29.7oC.Comparedwiththedesignvalue.therela.tiveerr0r
6、issurprisinglycomparedto5%~21%.Atthesametimethematchinganalysisofcomponentsandtheanalysisofper—formaneeindifferentconditions.Itshowsthatthemoreboardsofsieveplatetoweraremorehelpfultoimprovethedistillationseparationeffect.Theaveragetemperatureofheattransferofplateheatexchangeris30.13~C.Whenthecooli
7、ngwaterinlettern.peratureunchanged,thecoolingwatervolumeincreaseof10%,COPdropped4%,andtheperformanceofeachcomponentisinfluenced.Keywords:absorptionsystem;ammonia—water;performance;experiment1前言当今世界,如何降低能耗,提高资源的利用
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