Thaum tsim cov khoom siv hluav taws xob ua haujlwm nrog cov dej huv, dej txias, ib qho ntawm cov teeb meem loj tshaj plaws rau kev ua kom muaj cua sov yog feem ntau lub raj phab ntsa nws tus kheej. Xaiv cov khoom siv hluav taws xob zoo heev tuaj yeem txhim kho cov hluav taws xob hloov hluav taws xob thiab txo qhov sib pauv loj. Hloov cov yeeb nkab steel hlau nrog lub siab - conductivity tooj liab alloy yog li ib txoj hauv kev zoo tshaj plaws los tsim kom muaj kev sib cog lus ntau dua thiab teb qis - kub exchanger.
Qhov sib piv ntawmphosphorized tooj liab vs stainless hlau thermal conductivityqhia txog qhov kev lag luam loj loj ntawm kev ua haujlwm thermal thiab corrosion kuj.
Nkag siab txog Phosphorous -Deoxidized Copper
DHP Copper yog dab tsi?
Phosphorous -deoxidized tooj liab, feem ntau hu ua DHP tooj liab, yog cov khoom lag luam ntshiab tooj liab uas muaj cov phosphorus me me ntxiv. Cov phosphorus txhim kho brazing thiab vuam yam ntxwv los ntawm kev txo cov pa oxygen hauv cov qauv hlau.
Vim nws zoo heev formability thiab thermal kev ua tau zoo, DHP tooj liab yog dav siv nyob rau hauv:
Cov kav dej hauv tsev
Cov tub yees condenser
HVAC kub exchangers
Cooling coils
Tsawg-kub kua tshuab
Cov khoom sib xyaw ua ke siab thermal conductivity nrog kuj yooj yim fabrication thiab koom nrog.
Kev sib piv ntawm thermal conductivity
Copper Versus Stainless hlau
Lub ntsiab kom zoo dua ntawm DHP tooj liab yog nws tshwj xeeb thermal conductivity. Thaum kwv yees li 20 degree, phosphorous -deoxidized tooj liab feem ntau pom muaj thermal conductivity nyob ze:
kDHP Copper≈340 W/(m⋅K)k_{\\mathrm{DHP\\Copper}} \\approx 340\\ \\mathrm{W/(m\\cdot K)}kDHP Copper ≈340 W/(m⋅K)
Los ntawm kev sib piv, tus qauv 316L stainless hlau ua cua sov ntawm xwb:
k316L≈16 W/(m⋅K)k_{\\mathrm{316L}} \\approx 16\\ \\mathrm{W/(m\\cdot K)}k316L≈16 W/(m⋅K)
Qhov no txhais tau tias tooj liab hloov cov cua sov los ntawm nws phab ntsa kwv yees li nees nkaum npaug zoo dua li 316L stainless hlau.
Copper yog ib qho thermal superhighway piv rau steel txoj kab winding. Thaum tshav kub kub txav ceev ceev los ntawm cov tubing tooj liab nrog qhov tsawg kawg nkaus kub poob hla lub raj phab ntsa.
Lub thermal conductivity ntawm DHP tooj liab txo qis me ntsis raws li qhov kub thiab txias, tab sis nws tseem muaj ntau dua li cov hlau tsis muaj steel nyob rau feem ntau qis - qhov kub thiab txias ua haujlwm.
Yog vim li cas Thermal Conductivity Matters nyob rau hauv Thaum tshav kub kub Exchangers
Txo phab ntsa tiv thaiv
Nyob rau hauv tubular tshav kub exchanger, thermal kuj los ntawm ntau qhov chaw:
Cov yeeb yaj kiab kub - sab dej
Lub cev phab ntsa
Cov dej txias -sab dej
Fouling txheej
Thaum siv cov dej huv ntawm ob sab, lub raj phab ntsa ua haujlwm dhau los ua ib feem tseem ceeb ntawm tag nrho cov cua kub hloov mus.
Cov thermal conductive ntws los ntawm phab ntsa tuaj yeem piav qhia los ntawm:
q=kAΔTLq=\\frac{kA\\Delta T}{L}q=LkAΔT
qhov twg ntau dua thermal conductivity tso cai rau cov cua sov ntau dua los ntawm tib phab ntsa tuab.
Vim tias DHP tooj liab ua cov cua sov kom zoo, cov phab ntsa tsis kam ua qhov me me piv nrog cov hlau tsis muaj steel.
Kev cuam tshuam rau Exchanger Size
Compact Designs ua tau
Qhov txawv ntawm qhov ua rauphosphorized tooj liab vs stainless hlau thermal conductivitytso cai rau cov khoom siv hluav taws xob tooj liab kom ua tiav tib lub luag haujlwm txias uas siv cov khoom siv tsawg dua thiab qhov chaw me me.
Rau lub raj phab ntsa tiv thaiv ib leeg, ib qho kev sib pauv tooj liab yuav xav tau tsuas yog ib feem ntawm thaj chaw uas xav tau los ntawm stainless hlau.
Hauv kev xyaum, txawm li cas los xij, tag nrho cov kev hloov pauv loj txo qis tsis yog nees nkaum- quav vim tias cov dej - sab zaj duab xis coefficients tseem txwv tag nrho cov kev hloov pauv cua sov.
Cov dej ciam ciam txheej ntawm txhua sab ntawm lub raj tsim kev tiv thaiv ntxiv uas txawm tias zoo meej conductivity tsis tuaj yeem tshem tawm.
Raws li qhov tshwm sim, qhov kev hloov pauv qhov loj me me yog feem ntau ze rau:
Ob mus rau peb zaug me me
Txo qhov hnyav tag nrho
Txo cov khoom siv
Ntau compact installation hneev taw
Txawm tias qhov kev txhim kho tiag tiag no tseem ceeb heev hauv cov tub yees, dej txias, thiab cov txheej txheem ua kom txias txias.
Daim ntawv thov Qhov twg Copper Excels
Cov dej huv thiab tub yees
DHP tooj liab ua tau zoo tshwj xeeb hauv cov kab ke uas huv, tsis yog -cov kua dej corrosive.
Cov ntawv thov uas muaj xws li:
Cov tub yees condenser
Hauv tsev dej kub exchangers
HVAC cov evaporators
Chilled dej systems
Thaum tshav kub kub twj
Tsawg-kub txias lub voj voog
Cov khoom sib xyaw ua ke ntawm cov khoom siv hluav taws xob siab thiab kev tsim khoom zoo ua rau nws tshwj xeeb tshaj yog txaus nyiam qhov twg compactness thiab zog efficiency yog qhov tseem ceeb.
Kev Tiv Thaiv Corrosion
Thermal Performance Versus Chemical Survival
Txawm hais tias nws cov conductivity zoo heev, tooj liab ua haujlwm tsis zoo hauv ntau qhov chaw tshuaj lom neeg hnyav.
Copper muaj kev txwv tsis pub dhau:
Muaj zog acids
Alkaline daws
Chloride- cov kua dej nplua nuj
Oxidizing tshuaj systems
Ammonia- muaj ib puag ncig
Hauv cov ntawv thov no, kev xeb tuaj yeem ua rau cov tubing tooj liab sai sai, ua rau cov dej xau thiab sib kis.
316L stainless hlau, txawm hais tias deb tsawg dua, muab cov tshuaj zoo dua qub nyob rau hauv ntau qhov chaw ua haujlwm.
Qhov no yog vim li cas stainless hlau tseem siv dav hauv:
Tshuaj ua cov nroj tsuag
Pharmaceutical systems
Marine cua txias khoom
Acid tuav systems
Corrosive txheej txheem exchangers
Lub superior corrosion kuj feem ntau outweigh lub thermal tsis zoo.
Kev xaiv cov khoom lag luam
Engineering yog qhov sib npaug ntawm qhov tseem ceeb
Xaiv cov khoom sib pauv ib txwm muaj qhov sib npaug ntawm ntau yam sib tw:
Thermal conductivity
Corrosion kuj
Mechanical zog
Nqi
Fabrication complexity
Kev pab lub neej
Tooj liab maximizes thermal efficiency tab sis txis tshuaj robustness. Stainless hlau ciaj sia nyob ib puag ncig chemically aggressive tab sis hloov tshav kub ntau npaum li cas zoo.
Qhov kev xaiv zaum kawg nyob ntawm qhov hnyav ntawm cov dej chemistry thiab kev ua haujlwm ib puag ncig es tsis yog conductivity ib leeg.
Xaus
Phosphorous-deoxidized tooj liab tseem yog ib qho ntawm qhov siab tshaj - ua cov khoom siv hluav taws xob hloov pauv kom huv si - dej thiab qis - qhov kub thiab txias. Nrog thermal conductivity nyob ze ntawm 340 W / m·K ntawm chav tsev kub, DHP tooj liab hloov cov cua sov kwv yees li nees nkaum npaug zoo dua li 316L stainless hlau, ua kom compact, sib sib zog nqus, thiab zoo heev exchanger designs.
Txawm hais tias tiag tiag -kev hloov pauv loj hauv ntiaj teb no yog ntsuas los ntawm cov kua dej- sab nraud cov kev txwv kub hloov mus, cov tshuab tooj liab tseem feem ntau ua tiav qhov loj me me ntawm ob mus rau peb zaug piv nrog cov khoom siv stainless hlau. Qhov no ua rau tooj liab tshwj xeeb tshaj yog muaj txiaj ntsig hauv tub yees condensers, HVAC systems, thiab kev siv dej hauv tsev.
Txawm li cas los xij, qhov tshwj xeeb conductivity ntawm tooj liab los nrog ib qho kev txwv loj: kev ua tsis zoo rau cov tshuaj lom neeg ib puag ncig. Thaum cov kua qaub, alkalis, los yog cov kab mob corrosive nkag mus rau hauv cov txheej txheem, stainless hlau feem ntau dhau los ua qhov kev xaiv ruaj khov dua txawm tias nws cov khoom qis dua.
Hauv kev tsim cov txheej txheem thermal, kev xaiv cov khoom tseem muaj qhov sib npaug ntawm qhov kev hloov pauv ntawm cov cua sov thiab cov tshuaj muaj sia nyob. Tooj liab tuaj yeem ua tus thawj tswj hwm lub ntiaj teb kev huv huv - dej kub pauv, tab sis corrosion thaum kawg txiav txim siab qhov twg qhov tseem ceeb tuaj yeem txuas ntxiv mus.
