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1、第34卷第11期中国电机工程学报Vol.34No.11Apr.15,20142014年4月15日ProceedingsoftheCSEE©2014Chin.Soc.forElec.Eng.1779DOI:10.13334/j.0258-8013.pcsee.2014.11.009文章编号:0258-8013(2014)11-1779-08中图分类号:TM615DSG槽式太阳能集热器非线性分布参数模型及动态特性12122郭苏,刘德有,张耀明,许昌,王沛(1.东南大学能源与环境学院,江苏省南京市21
2、0096;2.河海大学能源与电气学院,江苏省南京市210098)NonlinearDistributedParameterModelandDynamicCharacteristicsofParabolicTroughDirectSteamGenerationSolarCollectors12122GUOSu,LIUDeyou,ZHANGYaoming,XUChang,WANGPei(1.CollegeofEnergyandEnvironment,SoutheastUniversity,Nanji
3、ng210096,JiangsuProvince,China;2.CollegeofEnergyandElectricity,HohaiUniversity,Nanjing210098,JiangsuProvince,China)ABSTRACT:Directsteamgeneration(DSG)inparabolic数特征。因此,建立DSG槽式太阳能集热器的非线性分布troughsolarpowersystemhaslongsolarcollectorandobvious参数模型,以DSG集
4、热器入口工质温度、质量流量和出口distributedparametercharacteristics.Therefore,anonlinear压力为边界条件,采用迎风格式的有限差分法对模型进行离distributedparametermodelforparabolictroughDSGsolar散求解。仿真研究了DSG集热器主要参数在太阳辐射强度、collectorswasbuiltinthispaper.Asaboundarycondition,给水温度和给水流量变化等扰动工况下的响应特性,
5、结果与fluidtemperatureandmassflowhadtobeprovidedattheinlet文献实验结果基本一致,验证了模型的正确性。结果表明:aswellasthepressureattheoutlet,andthefinitedifferential太阳辐射强度降低时,出口工质温度下降得很快;给水流量approachwithanupwindschemewasadoptedtodiscreteand或给水温度小幅下降时,出口工质温度和流量都会滞后响应solvethemodel
6、.Comparedwithexperimentalresultsfromthe且变化显著;DSG集热器出口工质流量在某些情况下会发literature,thecorrectnessofthemodelwasvalidatedby生脉动,实际应用中应避免脉动状态的发生或降低其影响。simulationresultsduringthemainconditionssuchassolarradiationintensity,inletfluidtemperatureandinletmassflow关键词
7、:抛物线槽式;直接蒸汽发电;太阳能集热器;非线change.Simulationresultsshowthatfluidtemperatureatthe性分布参数模型;动态特性outletdecreasesquicklywhensolarradiationintensityis0引言declined;Furthermore,theresponsesoffluidtemperatureandmassflowattheoutletdelaylargelyandstabilizeslowlywhen直
8、接蒸汽发电(directsteamgeneration,DSG)槽massflowortemperatureattheinletdeclinedslightly;Most式太阳能热发电系统(槽式系统)是利用抛物线型槽significantly,apulsationphenomenonofoutletmassflowmay式聚光器将太阳光聚焦到吸热管上,直接加热吸热happeninsomeconditions,whichshouldbeavoidedor管内的工质水,直至产生蒸汽推动汽轮发电机组发