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时间:2020-04-27
《基于状态空间超级结构的多流股换热网络最优设计-论文.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、第65卷第6期化工学报Vl01.65NO.62014年6月CIESCJournalJune2014研究论文):3)30:j3]3,j’基于状态空间超级结构的多流股换热网络最优设计李永强,王兵,一,邹雄,董宏光,姚平经(0大连理工大学化工学院,辽宁大连116024:中国石油天然气股份有限公司炼油与化工分公司,北京100007)摘要:多流股换热器以其结构紧凑、高效低耗等特点,成为过程强化研究的热门领域,但对于多流股换热的过程与设备优势所在仍然值得商榷。基于多流股换热匹配改进状态空间超级结构,将多流股换热网络综合转化为超级换热器设计。首先,构造级联多流股换热器匹配过程操作算子,通过相
2、邻换热流股匹配,传递温位效应,实现多流股间传热严格计算;借助热容流率混合分配机制,实现各流股间任意分混操作。然后,考虑散热因素,改进目标函数,引入冷热损失和保温材料费用项,清晰体现多流股换热器因换热面互相覆盖而带来的外表面封包优势。进而,建立相应非线性数学规划模型,实现公用工程、设备投资、冷热损耗同步优化。最终,通过文献示例对所提方法可行性与优越性进行验证。关键词:传热;多流股换热器;状态空间超级结构;模型;优化设计;系统工程DOI:10.3969~.issn.0438-1157.2014.06.028中图分类号:TQ021.8文献标志码:A文章编号:0438一l157(201
3、4)O6—2156—09OptimaldesignofmultistreamheatexchangernetworkbasedonstatespacesuperstructureLIYongqiang,WANGBing,一,ZOUXiong,DONGHongguang,YAOPingjing(SchoolofChemicalEngineering,DalianUniversityofTechnology,Dalian116024,Liaoning,ChinaRefiningandChemicalsCompany,PetroChina,Beijing100007,China)Ab
4、stract:Multistreamheatexchanger(MHEX)hasattractedattentionintheprocessintensificationfieldwithitscompactstructure,higheficiencyandlowheatloss.However,thepotentialadvantagesofitsprocessandequipmentarestillworthdiscussing.AnimprovedState—spacesuperstructurebasedonMHEXsprocessoperator(PO)waspro
5、posedtoconvertthenetworksynthesisintoasuper-exchangerdesign.HierarchymatchingMHEXsPOwasconstructed,andthestrictheattransfercalculationamongmultiplestreamswasimplementedthroughtemperatm'ecoordinatedefectbetweenadjacentstreams.Arbitrarysplitingandmixingofanystreamwasachievedbycorrespondingmixe
6、rsandsplitersindistributionnetwork(DN).TheobjectivefunctionwasamelioratedbytakingheatlOSSintoconsideration.ThroughintroducingthecostofheatlOSSandthermalinsulationmaterial,theexternalsurfaceenvelopeadvantageofMHEXwaspresentedclearlyowingtocoveragebetweenadjacentheat—transfersurfaces.Then,acor
7、respondingnonlinearprogramming(NLP)mathematicalmodelwasformulatedforgeneratingtheoptimaldesignofMHEXsnetworkwhilesynthesizingtheutilities,equipmentinvestment,heatlossandthermalinsulationmaterialsimultaneously.Atlast,fourcasestudieswereperformedtove
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