R22替代及工質(zhì)泄漏擴(kuò)散危險(xiǎn)性理論分析與實(shí)驗(yàn)研究.pdf

1、天津大學(xué)博士學(xué)位論文R22替代及工質(zhì)泄漏擴(kuò)散危險(xiǎn)性理論分析與實(shí)驗(yàn)研究姓名：彭繼軍申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：制冷及低溫工程指導(dǎo)教師：楊昭20061001ABSTRACTCurrentsubstitutesforR22havemanyshortcomingsIt’SimportanttOdevelopnewenvironmentfriendlyandenergysavingR22replacementsthathaveselfownedint

2、ellectualpropertyrights，andtostudytheleakage，diffusion，safetyandotherrelativetraitsofsubstitutesThemaincontentsofthispaperareasfollowsBasedontheCSDequationofstate，asoftwarepackagedevelopedforoptimalchoiceofalternativeref

3、rigerantsisworkedoutSomepossibleenvironmentallyfriendlyalternativesforR22wereselected，andtheirperformancesweresimulatedFinallyRTJU3andRTJU4areselectedtoreplaceR22ComparedtoR407C，newrefrigerantshavesuchadvantagesasenviron

4、mentallyfriendly’lowslidetemperature，goodperformancesinmoderatelyhightemperatureheatpumpworkingconditionsExperimentalandtheoreticalanalysesshowthatRTJU3havehighsecurityandisfitforreplacingR22inmoderate—higlltemperaturehe

5、atpumpsToobtaintheinstantaneousreleaseconditionofpureflammablerefrigerantsintanks，aninstantaneousreleasemodelisestablishedConsideringtheheatexchangebetweentherefrigerantandenvironmentdynamicmodelsofpureandmixedrefrigeran

6、tsleakingfromvaporandliquidspacewereestablishedtodescribeactualreleaseprocessesbetterAformulaofjudgingtheburnablefatalnessofmixrefrigerantincreaseordecreaseintheprocessofleakageisdeducedThemaininteriorandexteriorfactorsi

7、nfluencingpurerefrigerantsreleasingfromthevaporspace，andtheleakage’SeffectontheflammabilityofmixrefrigerantsareanalyzedAimingatthecharacteristicofvariedmassflowrateofrefrigerantsleakingfromtanks，anewunsteadybigspacedi硒si

8、ngmodelisputforwardTheconcentrationofrefrigerantsafterfinite—timereleaseanddiffusionwasgainedbythenumericalandanalyticalsolutionsofthemodelToimproveapplicationvalue，thenewdiffusionmodelismodified，andanewmodifringheavygas

9、effectmethodissetupThroughapplicationandanalyseoninstance，thedangerousareaofburningandblastingofnewrefrigerants，thefactorsaffectingthedangerousareaareinvestigatedBesides，thisworkstudiesthelaminarpremixedflameofflammabler

10、efrigerants，themechanismofflamepropagation，themainfactorsinfluencingtheflamepropagationvelocityimprovingtheexistedtest—bedthatteststheflammablelimitsofgas，testingtheflamepropagationvelocityandflammablelimitsofmanyrefrige