PARAMETRIC STUDY OF INDUSTRIAL CHIMNEYS

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056

Volume: 09 Issue: 05 | May 2022 www.irjet.net p ISSN: 2395 0072

PARAMETRIC STUDY OF INDUSTRIAL CHIMNEYS

1 , Prof. Nikam Pravin Ankushrao2 , Dr. Mate N.U.

1Department of Civil Engineering, SND College of Engineering & Research Center Babhulgaon Tal. yeola Dist.Nashik

2Department of Civil Engineering, SND College of Engineering & Research Center Babhulgaon Tal.yeola Dist.Nashik 3Department of Civil Engineering, Amrutvahini College of Engineering ,sangamner ,Dist Ahmadnagar. ***

Abstract Chimneysorstacksaresignificantindustrialstructuresthatallowharmfulgasestobeemittedatahigherelevation, away from the surrounding atmosphere. These constructions are typically tall, slender, and have circular cross sections. Chimneysarebuiltwithavarietyofmaterials,includingconcrete,steel,andbrick.Whereveraquickheat upquantityandlow thermalcapabilityareaunitisrequired,asteelchimneyisattachedtoworkmethodically.Steelchimneysarealsoconsidered capableandcost effectiveforheightsupto45m.Forthedesignofindependentindustrialsteelchimneys,therearenumerous standardsavailable:CommonplaceinIndiaIS6533:1989isastandardthatwaspublishedin1989.(Part 1andPart 2).An independentsteelchimney'sgeometryiscriticaltoitsstructuralresponseunderlateraldynamicloading.Thisisbecausethe stiffnessparametersofthechimneyaremostlydeterminedbytheshape.Thekeygeometricalfeaturesofthesteelchimney,on theotherhand,arerelatedtotheassociatedenvironmentalcircumstances(e.g.,overallheight,diameteroftheexit,etc.).Ontop ofthat,thedesigncode(IS 6533:1989part2)imposesaslewofrequirementsonthegeometryofsteelchimneysinorderto ensurethatthespecifiedfailuremodeisachieved.ThefollowingaretwoimportantIS 6533:1989geometricalconstraintsfor designingself supportingsteelchimneys:

Keywords:studyobject,scope,windprofile,basicwindspeedstudyDiscussion

INTRODUCTION :- Chimneys,alsoknownasstacks,arecrucialindustrialstructuresthatallowharmfulgasestobeemittedata higherelevation,awayfromthesurroundingatmosphere.Theseconstructionsaretypicallytall,slender,andhavecircularcross sections.Chimneysarebuiltwithavarietyofmaterials,includingconcrete,steel,andbrick.Steelchimneysarewell suitedto workinasystematicmannerwhenaquickheat uptimeandlowthermalcapabilityareaunitarerequired.Steelchimneysare alsoconsideredcapableandcost effectiveforheightsupto45m.Forthedesignofindependentindustrialsteelchimneys,there are numerous standards available: Commonplace in India IS 6533:1989 is a standard that was published in 1989. (Part 1 andPart 2).Anindependentsteelchimney'sgeometryiscriticaltoitsstructuralresponseunderlateraldynamicloading.Thisis becausethestiffnessismostlydeterminedbythegeometry.

Objective of Study:

1. Theheightsoftheindustrialchimneyschosenforanalysisare50,55,and60meters,withheighttobasediameter ratiosof11,12,and13forbothRCCandSteelChimneys

2. The optimum top diameter to base diameter ratio is 0.6. These characteristics were used to a total of 6 chimneys forwindspeedsof39m/sinordertoevaluatewindresponseandstiffnesscriteria

3. Chimneysaremodeledusingafixed baselinearelementinSTAADPROtocalculatemodeshapesandfrequencies.

1.SCOPE:

i.Thecurrentstudytakesintoaccountself supportingflaringsteelandRCCchimneys.

ii.Chimneysarepermanentlyattachedtotheirsupports.Inthecurrentinvestigation,thesoilelasticitywasexamined.

iii.Allofthechimneysconsideredaresingle flue.

iv.Overtheentireheightofthechimney,uniformthicknessisregarded.

v.Forthedesignofthechimneys,theonlywindloadistakenintoaccount.

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056

Volume: 09 Issue: 05 | May 2022 www.irjet.net p ISSN: 2395 0072

LITERATUREREVIEW:

A.Dhandapani.N.V.(2018)Chimneysserveaslandmarksforpowerplantsandindustrialinstallationswhenmodelingthem withtheFEMmethod.Chimneysareverticalstructuresthatventgaseouscombustionproducts,chemicalwaste gases,and exhaustairintotheatmosphere.RCchimneyshavebecomeatypicalconstructioninmodernsituationsbecausetotherapidrise of andthegrowingnecessityforairpollutionmanagement.

B.SivaRamaPrasadC.V.(2017)Industrialchimneyshavelongbeenusedbyenterprisestodissipatehotfluegasesintothe atmosphere,reducingpollutionandensuringthatairqualityregulationsaremet.Pollutantimpactontheenvironmentcanbe mitigatedbydistributingpollutantlatitudes.Inthecaseofachimneydraught,airqualityisusuallypoor.

1. METHODOLOGY

A. Basic Design

Wind speed

Oneofthemostimportantphasesindesigningthealong windloadisdeterminingthefundamentaldesignwindspeed.The basicwindspeedistakenintoaccountwhilecalculatingtheeffectivewindpressure.Thebasicwindspeed(Vb)isdefined(by theCICINDcode)asanhourlywindspeedat10mabovethegroundlevelinopenflatcountrywithnoimpediments.Thismeans thatthewindspeedismeasuredataheightoftenfeetabovethegroundlevelatthechimney'slocationandaveragedoveran hour.

B. Wind Profile

Frictionalcontactwiththeearth'ssurfaceslowswindmovement.Turbulenceinwindflowacrossaregionknownasthe 'atmosphericboundarylayer'isasubtleoutcomeofthisretardation.Thethicknessofthisphysicalphenomenaisdetermined bytheroughnessoftheterrainandtheangleoflatitude.Thesteeperthetopography,thegreaterthemeanflowand,asaresult, thegradientheight.

1.STAADMODEL

ThemodelwascreatedinSTAADProwithafour noddedplateelementandalinemodel.Thedeflectionofthesetwotypes wasevaluatedunderthesameloadandfoundtobeidentical.Asaresult,thelinearelementmodelwaschosensinceitissimple toproduceandgetmode shapes

Figure2 3Chimneywith50meterheight Figure2 2Chimneywith55meterheight

Figure2 4TopDiameterofchimney

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International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056

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Figure2 5BaseDiameterofChimney

Result & Discussion: OnlywindforceonsidesforbothRCandSteelStackanalyseswithvariedH/Dratios,andtheir resultsarecomparedintermsofNodedisplacement,Supportreaction,Supportmoment,platestresses,andotherfactors.

Node Displacement for RC Stack

Table3 1NodeDisplacementinSteelStack

Node Displacement in X & Y direction(mm) H/D=11 H/D=12.5 H/D=13 312.709 483.763 721.576

Node Displacement for Steel Stack

Table3 2NodeDisplacementinSteelStack

NodeDisplacementinX&Y direction(mm) H/D=11

H/D=12.5 H/D=13 107.753 166.731 248.74

Comparison between RC & Steel Chimney

Node Displacement in X &Ydirection(mm)

Discussion

Table3 3ComparisonofRC&SteelChimney

Concrete H/D=11 Steel H/D=11 Concrete H/D=12 5 Steel H/D=12 5 Concrete H/D=13 Steel H/D=13 312.709 107.753 483.763 166.731 721.576 248.74

WhentheheightoftheRCchimneyisincreasedby35percentand56percent,themaximumnodedisplacementincreases by35percentand56percent,respectively.Whencomparedtoa50mchimney,thelengthsincreaseto55mand60m, respectively.Similarly,MaximumNodeDisplacementincreaseswithsteelchimneyheight,increasingby35percentand56 percentrespectively.Whencomparedtoa50mchimney,thelengths increaseto55mand60m,respectively.When comparedtoRCchimney,themaximumNodedisplacementinSteelchimneyis65percentlower.

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International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056 Volume: 09 Issue: 31 | May 2022 www.irjet.net p ISSN: 2395 0072

oThemaingoalofthisthesiswastocomparethegeometricalconstraintsofself supportingRCandsteelchimneysinterms of analysis. Here, weexamine and evaluate steel and concrete chimneys, taking intoaccountlateral forcesand the results producedintermsofNodeDisplacement.

oTheanalysisconcludedthatastheH/Dratioincreases,nodedisplacementincreases,andRCsteelchimneysaremoreexact thansteelchimneyswhenthepeakofthestackisincreased.

oAnincreaseinthestructure'sweightincreaseswindmoments,whereasanincreaseinthestructure'sheightandtheheight tobottomdiameterratioincreasesbothstaticanddynamicwindmoments

REFERENCES

[1]N.V.Dhandapani,R. Manimaran, R. Velmurugan (2018) "International Journal OfEngineering & Technology" Vol. 7(2.8) (2018)622 625AStudyonseismicloadcharacteristicsandmodellingofchimneystructureusingFETapproach[2]Dr.S.K.Rao, C.V.SivaRamaPrasad,C.V.SivaRamaPrasad,C.V.SivaRamaPrasad,C.V.SivaRamaPrasad,C.V.SivaRamaPrasad,C.V.SivaRama

[2] NEYS" Journal of Emerging Technologyies and Innovative Research(JETIR)"JETIR(ISSN 2349 5162)December 2017,Volume4,Issue12pp428 432"JETIR(ISSN 2349 5162)December 2017,Volume4,Issue12pp428 432"JETIR(ISSN 2349 5162)December2017,Volume4,Issue12pp

[3]V.MichalcovaandL.Lausova(2017)Numericalmethodfordeterminingequivalentaerodynamicroughnessofindustrial chimneyhttp://dx.doi.org/10.1016/j.compstruc.2017.03.013

[4]R.kalaimugil,K.Shanthi2(2016)ANALYSIS THE EFFECT OF WIND AND SEISMIC LOAD ON STEEL CHIMNEY” 695X(Print)ISSN2395 695X(Online)Vol.2,Issue4,April2016pp78 85

[5]P. Kuras, T. Owerko, R. Kocierz(2016) "Analysis of the efficiency of steel chimney vibration dampers using surveying methods,"inProceedingsoftheJointInternationalSymposiumonDeformationMonitoring(JISDM),

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