Kev sib tham txog kev xaiv ntawm photovoltaic nplaum zaj duab xis los ntawm qhov kev xav ntawm kev ntseeg siab hauv kev siv sab nraum zoov ntawm cov khoom

2024 yuav yog ib lub xyoo tseem ceeb rau kev ciaj sia ntawm qhov fittest nyob rau hauv kev lag luam photovoltaic, vim kev sib tw hnyav ua rau iteration ntawm roj teeb technology thiab kev ceev ntawm kev lag luam daim ntawv thov nyob deb tshaj li kaum xyoo dhau los.

Txawm li cas los xij, tsis hais seb lub roj teeb yuav rov ua li cas, seb puas yuav xaiv POE (polyolefin elastomer), EVA (ethylene vinyl acetate copolymer), lossis EPE rau ntim cov iav ob chav, ib lub iav iav, los yog cov khoom siv tau yooj yim, qhov no yog ib qho uas yuav tsum tau zam thiab sib tham txog lub ncauj lus hnyav.

Cov cua sov, oxygen, dej, hluav taws xob ultraviolet, thiab kev ua haujlwm lom neeg nyob hauv ib puag ncig yog qhov tseem ceeb ua rau cov khoom tsis ua haujlwm. Hauv kev siv sab nraum zoov ntawm photovoltaic modules, dua li tsis suav nrog kev ua haujlwm lom neeg, lwm yam plaub yam tseem ceeb ntawm ib puag ncig tsis tuaj yeem tsis quav ntsej. Yog li ntawd, kev xaiv cov ntaub ntawv yuav tsum xub xav txog qhov cuam tshuam ntawm plaub yam ntawm cov ntaub ntawv.

Kab lus no piv cov teebmeem ntawm EVA thiab POE ntawm plaub qhov chaw ib puag ncig, muab txoj hauv kev tshiab thiab kev xaiv cov khoom siv.

1. Thaum tshav kub kub

Ob qho EVA thiab POE cov ntaub ntawv tuaj yeem tiv taus lub sijhawm luv luv ntawm qhov kub thiab txias ntawm li 150 degree tom qab kev sib txuas, tab sis yog tias qhov kub thiab txias tseem nce ntxiv, EVA yuav decompose thiab tso tawm ntau cov acetic acid saum 200 degree. Lub thermal decomposition kub ntawm POE yuav tsum muaj tsawg kawg yog 300 degree.

2. Cov pa

EVA thiab POE tsis yooj yim oxidized ntawm chav tsev kub, tab sis vim muaj me me ntawm cov dawb acetic acid monomer hauv EVA, lawv yuav oxidized ntawm qhov kub thiab txias. Txawm li cas los xij, POE yog tag nrho cov tshuaj ruaj khov carbon hydrogen bonds, thiab qhov kub ntawm qhov uas nws hnov ​​​​mob nrog oxygen yog siab dua EVA.

3. Dej

Los ntawm cov qauv molecular foundations, EVA muaj ester pawg, uas yooj yim hydrolyzed. Cov pab pawg carboxyl kawg uas tsim los ntawm hydrolysis ntxiv txhawb cov tshuaj tiv thaiv hydrolysis, ua rau kom muaj kev laus sai ntawm cov khoom. Thiab POE muaj tshuaj lom neeg ruaj khov ntawm tag nrho cov carbon hydrogen chains, uas tsis cuam tshuam los ntawm hydrolysis. Ntawm qhov tod tes, dej vapor kis tus nqi ntawm EVA zaj duab xis ntawm 38 degree thiab 90% RH yog hais txog 25g / m ^ 2 · 24h, thaum cov dej vapor kis tus nqi ntawm POE zaj duab xis yog 3g / m ^ 2 · 24h. Qhov ntawd yog hais tias, cov dej vapor kis tau tus nqi ntawm POE yog qis dua li ntawm EVA zaj duab xis, uas ua rau POE tsis tsuas yog nyuaj rau hydrolyze, tab sis kuj muaj dej ntau dua li EVA, yog li muab kev tiv thaiv muaj zog rau lwm yam khoom hauv lub module. .

4. Ultraviolet hluav taws xob

Ib yam li ntawd, POE yog tag nrho cov pa roj carbon hydrogen saw qauv nrog lub zog tshuaj lom neeg siab, nrog CH daim ntawv cog lus zog ntawm 414 kJ / mol thiab CC daim ntawv cog lus zog ntawm 332 kJ / mol. Nws tsis yooj yim tawg los ntawm UV hluav taws xob thaum raug rau hauv av, thaum lub zog CO bond zog ntawm pawg ester hauv EVA tsawg dua 330 kJ / mol, ua rau nws raug UV hluav taws xob ntau dua thiab tawg.

Hauv cov ntsiab lus, hauv kev siv cov khoom ntim, POE yog qhov zoo tshaj rau EVA raws li plaub lub ntsiab lus tseem ceeb ntawm kev siv sab nraum zoov: kub, oxygen, dej, thiab ultraviolet kev ua tau zoo. Nyob rau niaj hnub no qhov "high-efficiency" thiab "cov kev cai nruj" rau cov roj teeb, POE tseem yog qhov kev xaiv zoo tshaj plaws los xyuas kom meej lub sijhawm ntev thiab txuas ntxiv "tso tawm" ntawm cov roj teeb.

Txais tos xaiv Edobo qhov tseeb technology hnub ci vaj huam sib luag