Los ntawm kev xav ntawm kev ntseeg siab nyob rau hauv sab nraum zoov daim ntaub ntawv ntawm lub hnub ci vaj huam sib luag, kev xaiv ntawm photovoltaic zaj duab xis

2024 yuav yog lub xyoo tseem ceeb rau kev ciaj sia ntawm qhov haum tshaj plaws hauv kev lag luam photovoltaic. Kev sib tw hnyav tau coj mus rau iteration ntawm roj teeb technology thiab kev ceev ntawm kev lag luam daim ntawv thov nyob deb tshaj kaum xyoo dhau los.
Txawm li cas los xij, tsis muaj teeb meem li cas lub roj teeb rov ua dua, thiab seb puas yuav xaiv POE (Polyolefin Elastomer), EVA (Ethylene Acetate Ethylene Copolymer), lossis EPE rau ntim ntawm ob chav iav modules, ib lub iav modules, los yog hloov tau yooj yim, qhov no yog ib qho uas yuav tsum tau zam. lub ntsiab lus tham heev.
Cov cua sov, oxygen, dej, hluav taws xob ultraviolet, thiab kev ua haujlwm lom neeg 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 ib puag ncig tsis tuaj yeem tsis quav ntsej. Yog li ntawd, thaum xaiv cov ntaub ntawv, thawj qhov kev txiav txim siab yuav tsum yog qhov cuam tshuam ntawm plaub yam ntawm cov khoom siv.
Kab lus no piv cov teebmeem ntawm EVA thiab POE raws li plaub qhov ib puag ncig no, 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 nyob rau hauv chav tsev kub, tab sis vim muaj ib tug me me ntawm dawb acetic acid monomer nyob rau hauv EVA, lawv yuav oxidized nyob rau hauv high kub. Txawm li cas los xij, POE yog tag nrho cov tshuaj ruaj khov hydrocarbon bonds, thiab qhov kub ntawm qhov uas nws hnov ​​​​mob nrog oxygen yog ntau dua EVA.
3. Dej
Los ntawm cov qauv molecular foundations, EVA muaj ester pawg, uas yog nquag hydrolysis. Cov pab pawg carboxyl kawg uas tsim los ntawm hydrolysis ntxiv txhawb qhov tshwm sim ntawm cov tshuaj tiv thaiv hydrolysis, ua rau kev laus sai ntawm cov khoom. Cov tshuaj stability ntawm tag nrho cov hydrocarbon saw ntawm POE yog siab heev thiab tsis cuam tshuam los ntawm hydrolysis. Ntawm qhov tod tes, dej vapor transmittance ntawm EVA zaj duab xis ntawm 38 degree thiab 90% RH yog li 25g / m ^ 2-24 teev, thaum cov dej vapor transmittance ntawm POE zaj duab xis yog 3g / m ^ 2-24 teev. Uas yog hais tias, cov dej vapor transmittance ntawm POE yog tsawg dua li ntawm EVA zaj duab xis, uas ua rau POE tsis tsuas yog tsis tshua muaj heev hydrolysis, tab sis kuj muaj ib tug ntau dua dej thaiv lub peev xwm tshaj EVA, yog li muab kev tiv thaiv muaj zog rau lwm yam khoom nyob rau hauv. cov khoom.
4. UV rays
Ib yam li ntawd, POE muaj tag nrho cov qauv hydrocarbon saw, thiab nws cov khoom siv hluav taws xob muaj zog. CH bond zog yog 414 kJ / mol, thiab CC daim ntawv cog lus zog yog 332 kJ / mol. Nws tsis yog yooj yim tawg thaum raug ultraviolet lub teeb nyob rau hauv av, thaum lub CO daim ntawv cog lus zog ntawm ester pawg nyob rau hauv EVA yog tsawg tshaj li 330 kJ / mol, uas ua rau nws muaj kev cuam tshuam rau UV hluav taws xob 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 UV ua haujlwm. Nyob rau niaj hnub no "kev ua haujlwm siab" thiab "cov kev cai nruj" ntawm 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.