Txawm hais tias tus nqi siab dua, stainless hlau dej rhaub tso tsheb hlau luam feem ntau raug nqi ntau dua thaum piv cov nqi ntawm lub neej thiab yuav tsum tau nthuav tawm xws li.
Lub tshuab rhaub dej hauv tsev yog cov tub rog tiag tiag ntawm lub ntiaj teb cov neeg kho tshuab.Lawv feem ntau raug rau qhov chaw hnyav heev thiab lawv cov kev ua haujlwm hnyav feem ntau tsis quav ntsej.Ntawm dej ntawm lub rhaub dej, cov zaub mov, oxygen, tshuaj lom neeg thiab cov khib nyiab tau tawm tsam tag nrho.Thaum nws los txog rau combustion, kub siab, thermal stress, thiab flue gas condensate muaj peev xwm ntawm tag nrho cov ntaub ntawv.
Thaum nws los txog kev txij nkawm, cov dej kub hauv tsev (DHW) cov cua sov yog txhua yam tab sis tsis saib xyuas.Feem ntau cov tswv tsev siv lawv lub rhaub dej kom pom zoo thiab tsuas pom lawv thaum lawv tsis ua hauj lwm los yog to.Kos tus pas nrig anode? Yaug tawm cov khib nyiab?Puas muaj kev saib xyuas? Tsis nco qab, peb tsis mloog. Tsis xav tias DHW cov cuab yeej siv tau luv luv.
Lub neej luv luv no puas tuaj yeem txhim kho?Siv DHW cov cua sov ua los ntawm cov hlau tsis muaj steel yog ib txoj hauv kev ua kom lub neej expectancy.Stainless steel yog cov khoom muaj zog thiab ruaj khov uas muab kev tiv thaiv zoo dua rau cov dej thiab hluav taws kub, muab lub rhaub kom muaj kev pab cuam ntev.
Stainless hlau yog lub npe hu ua ferrous alloys nrog cov ntsiab lus chromium tsawg kawg yog 10.5% Lwm cov ntsiab lus xws li npib tsib xee, molybdenum, titanium thiab carbon kuj tuaj yeem muab ntxiv los muab kev tiv thaiv corrosion, lub zog thiab formability.Muaj ntau qhov sib txawv ntawm cov hlau sib txawv uas tsim cov "hom" thiab "qib" ntawm stainless hlau.
Yog hais tias ib tug neeg hais tias "muab ib co yas kav" koj yuav nqa dab tsi?PEX, CPVC, polyethylene?Tag nrho cov no yog "yas" kav, tab sis tag nrho cov muaj ntau yam sib txawv zog, muaj zog thiab daim ntaub ntawv.Ib yam mus rau stainless hlau.Muaj ntau tshaj 150 qib stainless hlau, tag nrho cov muaj ntau yam sib txawv thiab daim ntaub ntawv.Stainless steels siv nyob rau hauv domestic dej rhaub tsuas yog 1 3 6 hom, feem ntau yog 1 3 6 stainless hlau. ib 444.
Qhov sib txawv ntawm cov qib no yog cov concentration ntawm alloy nyob rau hauv lawv.Txhua "300" qib stainless hlau muaj kwv yees li 18% chromium thiab 10% npib tsib xee. Ob qib 316 kuj muaj 2% molybdenum, thaum qib 316Ti muaj 1% titanium ntxiv rau qhov sib xyaw, piv rau molybdenum 30 qib siab dua, tshwj xeeb tshaj yog 30% corrosion kuj. tsis kam rau pitting thiab crevice corrosion nyob rau hauv chloride ib puag ncig.316Ti qib titanium muab nws zoo heev formability thiab lub zog. Qib 444 muaj chromium thiab molybdenum, tab sis nws tsis muaj npib tsib xee. Feem ntau hais lus, ntau nickel, molybdenum, thiab titanium nyob rau hauv qhov sib tov, qhov zoo dua cov dej tsis muaj zog, thiab cov hlau tsis muaj zog. ua tib zoo saib cov qhab nia vim lawv tsis zoo ib yam
Stainless hlau yog siv nyob rau hauv txhua yam sib txawv ntawm cov dej rhaub.Nws yog feem ntau yog siv indirect DHW rhaub thiab condensing tankless dej rhaub.Indirect dej rhaub muaj ib tug sab hauv tshav kub hloov coil txuas nrog lub boiler los yog hnub ci collector voj.Lawv muaj ntau nyob rau hauv cov teb chaws Europe tshaj nyob rau hauv Canada vim dominance ntawm European hydro thiab hnub ci dej cua sov systems.
Stainless hlau kev tsim kho yog ib feem loj ntawm cov European indirect markets.In Canada, stainless hlau thiab iav-lined steel indirect tso tsheb hlau luam muaj, stainless hlau tso tsheb hlau luam feem ntau nqa tus nqi siab dua.In non-condensing tankless dej rhaub, lub tshav kub exchanger feem ntau yog ua los ntawm tooj liab.Nrog rau lub laub rau ntau dua efficiency condensing units, lub tshav kub exchangers yog tag nrho cov stainless hlau kub exchangers thiab lwm yam steel hlau. huab tais ntawm Canadian dej rhaub kev lag luam.Carbon steel nrog iav hauv ob sab hauv dominates ntu no.Stainless hlau feem ntau yog siv hauv tankless lossis ncaj qha raug rho tawm tank condensing dej rhaub.
Yuav kom ua tau zoo ntawm cov khoom siv no, cov roj flue yuav tsum tau txias hauv qab cov dej lwg kom tso cov cua sov ntawm cov roj.Qhov tshwm sim ntawm cov condensate yog qhov tseem ceeb ntawm cov dej vapor los ntawm cov khoom siv hluav taws xob, uas muaj pH tsawg thiab siab acidity.Qhov no acidic condensate yuav tsum tau xa mus rau hauv qhov dej pov tseg, tab sis qhov teeb meem loj dua ntawm cov dej kub yog qhov sib txawv ntawm cov dej kub.
Thaum tshav kub kub exchangers ua los ntawm cov hlau zoo tib yam los yog tooj liab yog ib qho nyuaj rau tiv no flue gas condensate rau lub sij hawm ntev.Stainless steel yog ib tug zoo xaiv cov ntaub ntawv vim nws siab corrosion kuj thiab yooj, cia nws tsim complex heat exchanger shapes.Muaj ntau hom condensing tankless dej rhaub uas siv stainless hlau tshav kub exchangers.Qhov no tso cai rau lawv los txhawb cov flue 0. 97.
Tank dej rhaub nrog condensing thev naus laus zis tseem tam sim no pib siv ntau zaus, tshwj xeeb tshaj yog nrog qee qhov kev hloov hauv lub tsev uas yuav tsum tau ua kom muaj dej ntau dua qhov ua tau zoo.Nws muaj ob hom tsev nyob hauv lub khw no.Cov iav-lined tso tsheb hlau luam yog lub tsev tag nrho submerged Secondary condensing heat exchangers. Sab nraud (dej sab) thiab sab hauv (sab hluav taws) ntawm cov hluav taws kub exchanger coils yog iav-lined nyob rau hauv, thiab cov iav-lined tag nrho cov qauv. tainless steel tank thiab coil siv tsis yog ib qho, tab sis muaj ntau yam xws li tag nrho cov hlau tsis muaj steel siv.
Tus nqi pib ntawm lub khob-lined tank yog qhov tseeb qis dua, thiab tsuas yog lub sijhawm yuav qhia tau tias cov khoom siv hluav taws xob resistant yuav nyob rau hauv qhov hnyav condensing ib puag ncig.Cov dej txias txias tshiab no muaj peev xwm ua tiav cov txiaj ntsig zoo dua li cov khoom siv hluav taws xob ncaj qha hluav taws xob, nrog thermal efficiency xws li 90% mus rau 96%. ers nkag mus rau hauv kev ua lag luam.
Ua tib zoo saib ntawm lub tank dej tso cua sov thiab koj yuav pom tias feem ntau ntawm cov hluav taws xob hluav taws xob ncaj qha, qhov hluav taws xob sab hauv, thiab cov tso dej ncaj nraim muaj cov iav-txheej thiab stainless hlau tsim.
Yog li, qhov zoo ntawm stainless hlau hla iav lined yog dab tsi? Koj ua li cas ntxias cov neeg siv khoom los nqis peev ntau hauv stainless hlau tso tsheb hlau luam?Qhov zoo tshaj plaws ntawm stainless hlau yog nws lub ntuj tsis kam rau cov dej tsis huv, uas ua rau muaj kev pab cuam lub neej.Vim nws muaj pes tsawg leeg ntawm corrosion-resistant hlau alloys, stainless hlau tso tsheb hlau luam muaj zog thiab ruaj khov dua li iav-lined tso tsheb hlau luam.Stainless steel tso tsheb hlau luam muaj kev tiv thaiv ntawm cov dej oxide bar.
Cov iav-lined tso tsheb hlau luam, ntawm qhov tod tes, cia siab rau iav-lined los muab kev thaiv ntawm cov pa roj carbon steel thiab dej.Rau lub caij nyoog, cov pa oxygen thiab cov tshuaj hauv cov dej yuav tawm tsam cov hlau thiab sai corrode nws.Vim nws yuav luag tsis tuaj yeem siv cov txheej txheem tiv thaiv zoo kawg nkaus (tsis muaj cov kab nrib pleb lossis pinhole tsis xws luag hauv cov txheej txheem tiv thaiv lub tank.)
Lub sacrificial anode rods yuav hnav thaum lub sij hawm, thiab thaum lub sij hawm ua tiav, electrolysis yuav pib erode lub exposed steel cheeb tsam nyob rau hauv lub tank.Tus nqi ntawm cov anode yog depleted nyob ntawm cov dej zoo thiab cov nqi ntawm cov dej siv. Sacrificial anodes feem ntau kav peb mus rau tsib xyoos, thiab anodes tuaj yeem hloov tau los tiv thaiv kev puas tsuaj ntxiv.
Qhov tseeb, tsis tu ncua kev tshuaj xyuas thiab hloov cov anodes feem ntau tsis saib xyuas, thiab lub tank xau, ua rau tag nrho lub tsev yuav tsum tau hloov.Unlike iav-lined tso tsheb hlau luam, stainless hlau tso tsheb hlau luam tsis xav tau "saib anodes" los tiv thaiv corrosion ntawm lawv qhov chaw.
Vim tias qhov no muaj zog ntxiv thiab kev tiv thaiv corrosion, feem ntau koj yuav pom stainless hlau tso tsheb hlau luam muaj kev ruaj ntseg ntev dua, nrog rau qee cov tuam txhab muab kev lav ris rau lub tank.
Stainless hlau tso tsheb hlau luam kuj muaj qhov zoo ntawm kev sib dua piv rau iav-lined tso tsheb hlau luam, ua kom yooj yim rau kev thauj mus los, tuav thiab nruab.Cov phab ntsa tuab ntawm stainless hlau siv hauv cov tso tsheb hlau luam feem ntau yog thinner dua li cov hlau zoo sib xws nrog iav linings.Combined nrog qhov hnyav ntawm iav lined nws tus kheej, iav lined jars feem ntau hnyav dua.
Tsis zoo li iav-lined jars, stainless hlau hub yuav tsum tsis tshua muaj kev saib xyuas thaum shipping, thiab cov iav hauv ob sab phlu yuav puas thaum shipping.Yog hais tias lub iav hauv ob sab phlu ntawm lub tank puas los yog tawg vim ntxhib tuav thaum lub sij hawm shipping los yog installation, nws yuav tsis paub txog thaum lub tank ua tsis tiav.
Stainless hlau tso tsheb hlau luam feem ntau muaj peev xwm tiv taus cov dej kub ntau dua li cov iav-lined tso tsheb hlau luam, thiab qhov kub siab tshaj 180F yuav tsis muaj teeb meem.Qee lub iav-lined tso tsheb hlau luam muaj kev ntxhov siab ntawm qhov kub siab, ua rau muaj kev pheej hmoo siab ntawm iav-lined puas tsuaj. Kub siab tshaj 160F tuaj yeem ua teeb meem rau qee cov iav liners.Cov ntawv thov kev lag luam pom thiab cov dej kub uas muaj hnub ci.
Nws raug nquahu kom sab laj rau lub iav-lined tank chaw tsim tshuaj paus rau qhov kev pom zoo siab tshaj plaws kev khiav hauj lwm kub.Stainless steel tso tsheb hlau luam feem ntau yog ib qho kev xaiv zoo dua rau kev siv kub.
Tsis muaj qhov tsis ntseeg tias tus nqi pib ntawm lub tank stainless hlau yog siab dua li ntawm cov iav-lined tank.Tab sis rau cov laj thawj tau hais ntawm no, lub neej voj voog tus nqi ntawm lub iav-lined tank yuav dhau los ua siab dua.Thaum muab piv rau cov nqi ntawm lub neej no, cov tank stainless hlau feem ntau raug nqi ntau dua nyob rau lub sijhawm ntev thiab yuav tsum tau qhia rau cov neeg siv khoom.
Robert Waters is President of Solar Water Services Inc., which provides training, education and support services to the hydroelectric power industry.He is a Mechanical Engineering Technology graduate from Humber College with over 30 years experience in circulating water and solar water heating.He can be reached at solwatservices@gmail.com.
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