Gore ra2024 rinova nguva inokosha kuindasitiri ye photovoltaic (PV) sezvo makwikwi makuru achikurudzira kufambira mberi kukuru mu tekinoroji yemasero uye mashandisirwo emaindasitiri, zvichipfuura kumhanya kwemakore gumi apfuura. Pasinei nekuvandudzwa uku, sarudzo yefirimu re encapsulation—ingave POE (polyolefin elastomer), EVA (ethylene-vinyl acetate copolymer), kana EPE—ichiri nyaya yakakosha uye inokakavadzana zvakanyanya kune ese ari maviri magirazi-girazi, girazi-back sheet, uye ma flexible modules.
Mamodule ePV ekunze anotarisana nekuora kwezvinhu zvina zvikuru zvakatipoteredza: kupisa, okisijeni, mvura, uye mwaranzi ye ultraviolet (UV). Kunyange hazvo basa rezvipenyu risingakoshi mukushandiswa uku, zvimwe zvinhu zvine basa guru mukusarudza zvinhu. Chinyorwa chino chinoenzanisa mashandiro eEVA nePOE mumamiriro ezvinhu aya, chichipa nzwisiso itsva uye nzira dzekusarudza zvinhu.
1. Kupisa
Zvese EVA nePOE, kana zvakabatana, zvinogona kutsungirira tembiricha dzenguva pfupi dzinosvika 150°C. Zvisinei, EVA inoora kana tembiricha dziri pamusoro pe200°C, zvichiburitsa acetic acid yakawanda, nepo POE inoramba yakagadzikana kusvika tembiricha dzapfuura 300°C.
2. Okisijeni
Patembiricha yemumba, zvinhu zvese izvi zvinoramba zvakanaka kuoxidation. Zvisinei, EVA ine zvicherwa zvema free acetic acid monomers, ayo anowanzo oxidation patembiricha yakakwira. Kusiyana neizvi, POE, inoumbwa chete ne chemically stable carbon-hydrogen bonds, inoda tembiricha yakakwira zvakanyanya kuti iite pamwe chete ne oxygen.
3. Mvura
Mapoka eEVA eEster anogona kubatwa nehydrolysis, zvichikonzera kuumbwa kwemapoka ecarboxyl anowedzera hydrolysis uye kuora kwezvinhu. POE, ine chain yayo yakazara yecarbon-hydrogen, yakagadzikana mumakemikari uye haikanganisike nehydrolysis. Pamusoro pezvo, POE inoratidza kuramba kwemvura, ine mwero wekutumira mvura (WVTR) weinenge 3 g/m2·24h pa38°C uye 90% hunyoro, zvichienzaniswa neEVA's WVTR ye25 g/m2·24h. Kupinda kwemvura kwakaderera uku kunosimudzira kugona kwePOE kudzivirira zvikamu zvemukati zvemodule kubva mukukuvadzwa nehunyoro.
4. Mwaranzi yeUltraviolet
Maumbirwo echaini yePOE ine carbon-hydrogen ine ma bond akasimba emakemikari—CH bonds pa414 kJ/mol uye CC bonds pa332 kJ/mol—zvichiita kuti dzisatsvedzerwe neUV-induced cleavage. Kusiyana neizvi, mapoka eEVA eester ane CO bonds ine simba rema bond riri pasi pe330 kJ/mol, izvo zvinonyanya kukonzera kuora kweUV.
Mhedziso
Pakati pezvinhu zvina zvikuru zvinokanganisa kuvimbika kwekushandiswa kwemagetsi panze—kupisa, okisijeni, mvura, uye UV—POE inogara ichishanda kupfuura EVA. Sezvo masero ePV achiwedzera kushanda zvakanaka uye achida kuvimbika kwakasimba, POE inoramba iri sarudzo yakanakisisa yekuona kuti magetsi anobuda kwenguva refu uye akagadzikana munzvimbo dzekunze.
