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页数:12页
时间:2020-03-23
《闭式热虹吸管强化传热研究进展.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、·2764·化工进展CHEMICALINDUSTRYANDENGINEERINGPROGREss2017年第36卷第8期闭式热虹吸管强化传热研究进展战洪仁,惠尧,吴众(沈阳化工大学能源与动力工程学院,辽宁沈阳110142)摘要:介绍了闭式热虹吸管的工作原理和性能表征方式,从固有参数和操作条件两个方面对闭式热虹吸管强化传热研究进行了综述,阐述通过改变工质种类、充液率、结构参数、表面处理、加热功率、运行温度、倾角和冷却介质流量等因素对闭式热虹吸管性能影响的主要机理。归纳总结了上述因素对闭式热虹吸管传热性能影响的研究现状和变化规律,并指出目前闭式热虹吸管强化传热研究中的不足和局限性。建议研究中应确定
2、各性能影响因素之间的协同关系,消除其他因素的影响,扩大所研究变量变化范围。此外建议将闭式热虹吸管强化传热研究与封闭空间内沸腾和冷凝等传热传质过程强化机理研究相结合,完善传热传质理论及计算公式。关键词:闭式热虹吸管;强化传热;性能表征;固有参数:操作条件中图分类号:TKl72.4文献标志码:A文章编号:1000—6613(2017)08—2764—12DoI:10.16085/j.issn.1000—6613.2016-2323Researchprogressonheattransf.erenhancementinclosedthermosyphonZHANHongren,HUIIao,WUZh
3、ong(Sch001ofEne翰,andPowerEngineering,ShenyangUnivers畸ofChemicalTecllnology,Shenyang110142,Liaoning,China)Abstract:Theworkingprincipleandpropertiescharacterizationof觚oclosedthemosyphonwereintroducedinthispaper.Theresearchontheclosedthennosyphonheat仃ansferenhancementwassummarized疳omaspectsofinherentpa
4、r锄etersandoperatingconditions.Themainmechanismofinnuenceonperfomlanceoftheclosedthermosyphonbychangingparameterswasintroduced,suchas咖eofworkingnuid,fillingratio,stmcturalparameters,surfacetrea虹nent,heatingpower,operatingtemperature,inclinationan91eand,coolingmediumnowrate.Researchstatllsandinnuenceo
5、fV撕ationoftheaboVefactorsonheatt1.ansferperfomlanceofclosedthe珊osyphonweresummarized.Shortcomingsandlimitationsofthepresentstudyonheattransferedhancementofclosedthemosyphonwerealsopointedout.Suggestionswereputforwardfor如rtherresearches,forexarnple,thesyne略ybetweenVariousfactorsshouldbedetemined,infl
6、uenceofotherfactorsshouldbeeliminated,scopeofVariablesshouldbeexpandedinresearches.Inaddition,itwassuggestedthatstudyonenhancementofheattransferinclosedthemosyphonandstrengtheningmechanismofheattmsferandmasstransferintheclosedspace,suchasboilingandcondensation,shouldbecombined.Heatandmasstransferthe
7、oryandcalculationf.omulashouldbeimproVed.Keywords:closedthenIlosyphon;heattransferenhancement;propeniescharacterization;idherentparameters;operatingconditions热管是一种高效的无源两相传热元件,由蒸发段、绝热管和冷凝段三部分组成。外部热源通过蒸
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