Water Vapor Permeability (WVP) ntawm cov khoom siv rwb thaiv tsev yog dab tsi?

Yog tias koj nyob hauv kev lag luam kev tsim kho lossis npaj yuav thaiv lub tsev, koj tuaj yeem hla lub sij hawm dej vapor permeability (WVP).Tab sis qhov tseeb yog WVP?Vim li cas nws tseem ceeb thaum xaiv cov ntaub ntawv rwb thaiv tsev?

Dej vapor permeability (WVP) yog ib qho kev ntsuas ntawm cov khoom muaj peev xwm tso cai rau kev tso dej vapor.WVP yog ib qho tseem ceeb uas yuav tsum tau xav txog thaum nws los txog rau rwb thaiv tsev vim nws cuam tshuam rau tag nrho cov kev ua tau zoo ntawm rwb thaiv tsev nyob rau hauv kev tuav ib tug xis thiab lub zog-npaum ib puag ncig sab hauv tsev.

Cov ntaub ntawv rwb thaiv tsev nrog qis WVP tuaj yeem tiv thaiv kom tsis txhob ya raws hauv cov phab ntsa thiab lub ru tsev.Qhov no yog qhov tseem ceeb heev vim tias cov av noo siab tuaj yeem ua rau pwm loj hlob thiab kev puas tsuaj rau lub sijhawm.Ntawm qhov tod tes, cov ntaub ntawv uas muaj WVP siab tso cai rau cov dej noo ntau dhau mus, uas tej zaum yuav muaj txiaj ntsig zoo hauv qee qhov xwm txheej uas yuav tsum tau tswj cov dej noo.

Yog li, yuav ua li cas txiav txim siab WVP ntawm cov ntaub ntawv rwb thaiv tsev?WVP ntawm cov khoom siv feem ntau yog ntsuas hauv grams ib square meter ib hnub (g / m² / hnub) thiab tuaj yeem kuaj tau siv cov qauv txheej txheem xws li ASTM E96.Cov kev ntsuam xyuas no suav nrog kev nthuav tawm cov khoom siv rau kev tswj cov av noo thiab ntsuas tus nqi uas cov dej vapor hla dhau ntawm cov qauv hauv lub sijhawm.

Thaum xaiv cov ntaub ntawv rwb thaiv tsev rau ib qhov project, nws yog ib qho tseem ceeb uas yuav tau xav txog kev nyab xeeb thiab lub tsev cov kev cai tshwj xeeb.Piv txwv li, nyob rau hauv cov huab cua txias uas yuav tsum tau cua sov feem ntau ntawm lub xyoo, nws yog ib qho tseem ceeb uas yuav tsum tau xaiv rwb thaiv tsev nrog ib tug qis WVP kom tiv thaiv kom txhob ya raws tsim thiab tej yam kev puas tsuaj rau lub tsev qauv.Ntawm qhov tod tes, nyob rau hauv cov huab cua kub thiab av noo, cov ntaub ntawv uas muaj WVP siab dua yuav nyiam kom ua tiav kev tswj hwm noo noo zoo dua thiab tiv thaiv kom tsis txhob muaj dej nyob hauv phab ntsa.

Muaj ntau ntau hom ntaub ntawv rwb thaiv tsev ntawm lub khw, txhua tus muaj nws tus kheej WVP cov yam ntxwv.Piv txwv li, cov ntaub ntawv rwb thaiv tsev ua npuas ncauj xws li polyurethane thiab polystyrene feem ntau muaj qis dua WVP, ua rau lawv tsim nyog siv rau hauv qhov chaw txias thiab ntub dej.Cellulose thiab fiberglass rwb thaiv tsev, ntawm qhov tod tes, muaj WVP siab dua, ua rau lawv zoo dua rau cov huab cua kub thiab av noo.

Ntxiv nrog rau kev xav txog huab cua, qhov chaw thiab daim ntawv thov ntawm rwb thaiv tsev yuav tsum tau txiav txim siab.Piv txwv li, kev rwb thaiv tsev hauv qab daus lossis qhov chaw nkag tuaj yeem xav tau cov khoom siv nrog qis WVP kom tsis txhob ya raws los ntawm kev nkag mus rau hauv lub hauv paus phab ntsa.Hauv qhov sib piv, cov rwb thaiv tsev hauv qab tuaj yeem tau txais txiaj ntsig los ntawm cov khoom siv nrog WVP siab dua rau kev tswj cov dej noo zoo dua thiab tiv thaiv kev sib kis.

Hauv kev xaus, dej vapor permeability (WVP) yog ib qho tseem ceeb uas yuav tsum tau xav txog thaum xaiv cov ntaub ntawv rwb thaiv tsev rau ib qhov project.Kev nkag siab txog WVP cov khoom ntawm cov khoom sib txawv thiab seb lawv cuam tshuam li cas rau kev tswj cov dej noo thiab kev ua haujlwm ntawm lub tsev tag nrho yog qhov tseem ceeb rau kev ua kom muaj kev nyab xeeb thiab siv zog hauv tsev.Los ntawm kev txiav txim siab txog koj qhov kev nyab xeeb, qhov chaw, thiab daim ntawv thov rwb thaiv tsev, koj tuaj yeem txiav txim siab txog qhov zoo tshaj plaws rwb thaiv tsev rau koj qhov project.