共晶盐低温蓄冷材料的实验

2004年8月第27卷第8期重庆大学学报JournalofChongqingUniversityAug.2004Vol.27No.8:1000-582X(2004)08-0113-03X李兴仁,童明伟,吴碧容(重庆大学动力工程学院,重庆400030):根据热力学原理筛选了适合工业低温相变蓄冷的共晶盐,并对其中的两种共晶盐进行了凝固和融解实验,通过实验分析了共晶盐的凝固点融点过冷度相变过程中是否有相分层及热稳定性等热学性能测试结果表明:这两种共晶盐都有望成为比较合适的低温蓄冷材料:共晶盐;蓄冷材料;低温蓄冷:TK124:A,,,,,,,,,,,,,[1-2]-,,,,[3],,2,1共晶盐蓄冷原理(),,,,-1,1(L-,S-,E-)1ABAB,/,,,,,[4]0AC,B,ACEBE,BDEEE,,AB,E(Eutectic)CEED,CEEDCEMEA,DENEBMENAB,MEN,E2,,E0,f=K+5+1=3-5=3-3=0,EX:2004-03-02:(1978-),,,,[5]E,,,,2实验部分2.1蓄冷材料的凝固点融点及过冷度,,NH4Cl-H2OBaCl2-H2O,,100mL100mL1-,-36eADAM4000,Ad-vantechVisiDAQ,?0.2e,60s,,,,,,,,,-,2.2蓄冷材料的相分离,,,,,,,()2.3蓄冷材料的热稳定性,,15e,50,3实验结果与分析3.1温度-时间曲线及相图-,-2~3,11-/%1NH4Cl-H2O19.52BaCl2-H2O23.021-32-2,,,B,,C,,,,D,,E,,F,,G,H,-,/0,;,,,412,,(e)3.2结果及分析23(Te)(Tf),2114重庆大学学报2004年4122Te/eTf/e/e1-14.9-13.23.12-8.6-8.02.54,33/e/%1-14.919.52-8.623.0,,12,,,,[6],,,1,2,,,-,,,,,,,,NH4Cl53.49,1.527;BaCl2#2H2O244.26,3.097[7],BaCl2#2H2OH2O,2,,,,,1,,2,,4结语1),E,,,2)-,;,12-14.9e-8.6e,,3),,12,,2,4)2,,(),:[1]HASNAINSM.Reviewonsustainablethermalenergystoragetechnologies,Part1:Heatstoragematerialsandtechniques[J].EnergyConversion,1998,39(11):1127-1138.[2]EL-ESSOUKYHI,AL-TIWAYHELFA.Effectivenessofathermalenergystoragesystemusingphasechangematerials[J].EnergyCon-vers,1997,38(6):601-617.[3]ABHATA.Lowtemperaturelatentheatthermalenergystorage:Heatstoragematerial[J].SolarEnergy,1983,30(4):312-332.[4],.[M].:,1997.[5].[M].:,1987.[6].[M].:,1995.[7].[M].:,1993.(120)115第27卷第8期李兴仁等:共晶盐低温蓄冷材料的实验ResearchonquantitativecorrelationbetweenchemicalenthalpyofwastewaterpollutantsandtheirtraditionalwaterqulityindexesGAOXu,GUOJin-song,FANGFang(1.KeylaboratoryoftheThreeGorgesReservoirRegion.sEco-Environment,MinistryofEducation,ChongqingUniversity,Chongqing400030,China;2.FacultyofUrbanConstructionandEnvironmentalEngineering,ChongqingUniversity,Chongqing400030,China)Abstract:Thermodynamicapproachisappliedtoenergyutilityofwasteratertreatmentprocess,definitionandcalculationofpollutants.chemicalenergywouldbeprimary.AccordingtotheFirstLawofThermodynamics,theconceptofpollutants.chemicalenthalpyadvanced,andcriterionforcalculatingchemicalenthalpyisintegrated,andenthalpycalculationmethodofcomplexorganicsubstancesestablishedtoointhispaper.Thenenthalpywascoulpedwithtraditionalwaterqualityindex-COD.Energyanalysisconclusionsofvariousprocessesinwastewatertreatmentanddifferentclassificationenergycanbecomparablethroughthestudy,energyindexbecomeseasytobelinkedupwithtraditonalwaterqualitymensuration.Keywords:wastewaterpollutants;thermodynamics;chemicalenthalpy;waterqualityindex;quantitativecorrelation(编辑姚飞)(115)ExperimentsontheeutecticsaltusedaslowtemperaturecoolstoragematerialLIXin-ren,TONGMing-wei,WUBi-rong(CollegeofPowerEngineering,ChongqingUniversity,Chongqing400030,China)Abstract:Binaryeutecticsaltisfitforlowtemperaturecoolstorageinindustrybasedonthetheoryofthermodynamics.Twosortsofbinaryeutecticsaltwerefoundbytheexperimentsoffreezingandmelting.Thethermophysicalpropertiesincludingfreezingpoint,meltingpoint,super-coolingdegreeandthermalstabilityduringphasechangeprocesswereinvestigated.Theresultsshowthatthesetwosortsofbinaryeutecticsaltarehopetobesuitableforlowtemperaturecoolstorage.Keywords:eutecticsalt;coolstoragematerial;lowtemperaturecoolstorage(编辑陈移峰)120重庆大学学报2004年