Solar Module Backsheet chhia siamthatna tur Flowable Silicone Sealant

Czech-Austrian research team chuan high-performance polysiloxane gel an siam a, hei hian solar module backsheet chhe tawhte chu ṭha takin a siam ṭha thei a, an insulation property a siam ṭha leh thei a, aging photovoltaic (PV) system-te hnathawh hun chhung pawh a ti rei thei bawk. He solution thar hian solar plant operator-te hmachhawn tur thil pawimawh tak a hmachhawn a, backsheet degradation-a bik takin kum 2010 vel a module siamah chuan-a tam zawkah chuan himna ngaihtuahna leh energy siamchhuahna hloh nasa tak a thlen thin.

Researcher-te hian specialized polysiloxane gel an hmang a, Czech-based silicone siamtu Siltech Solutions nen thawhhona neiin an siam a, hei hi PV module-te tana encapsulation auxiliary atan an hmang tlangpui a ni. Traditional rigid repair materials ang lo takin, team hian gel hi flowability tichak turin an siam danglam a, chu chuan crack te tak te pawh a fill thei a, backsheet chhia chungah seamless protective layer a siam thei bawk. Gel hi silicone-based polymer matrix atanga siam a ni a, a chhe thei lo tura filler atan fumed silica hmanga tihchak a ni a, moisture-curing agent hmangin boruak leh boruak lum leh vawt a awm chuan a khauh thei bawk.

"Moisture-initiated curing process hi a chung lam atanga pawn lam hawiin a kal a, gel chu moisture chu material chhunga a darh zel avangin a khauh zauh zauh a ni," tiin zirchiangtute chuan an sawifiah. "A dam kim chuan gel hian tensile strength leh elongation property tha tak nei flexible elastomer a siam a, hei hian backsheet material pangngai zawng zawng-pre-existing degradation emaw surface irregularities nei te pawhah adhesion nghet tak a siam thei a ni. He adhesion hi moisture ingress venna atan a pawimawh hle a, hei hi backsheet chhiatna nasa zawk leh insulation chhiat chhan ber a ni.

 

Backsheet materials ah test rawh

Polysiloxane gel hi backsheet material chi hrang hrang pangaah test hmasa ber a ni a, hei hian kum sawm kalta chhunga PV module-a hman thin component hrang hrangte a tarlang a ni: co-extruded polyamide (AAA backsheet) polyvinyl fluoride (PVF)-PET bilayer hmanga siam a ni a; polyvinylidene fluoride (PVDF)-PET bilayer hmanga siam chhuah a ni a; primer-coated PET hmanga siam; leh ethylene tetrafluoroethylene (ETFE)-based composite thar zawk a ni. Heng thilte hi an hman nasat em avangin leh hun kal zelah a chhe thei tih hriat a nih avangin thlan a ni.

Backsheet chi hrang hrang atang hian rectangular sample (3cm a zau, 12cm a sei) an tan a, gel chu strip tin air-exposed side-ah an hnawih a. "Backsheet strip pahnihna, air side down, gel-coated sample chungah dahin zawi zawiin press a ni a, uniform gel thickness 1.2mm vel a awm theih nan," tiin team chuan chipchiar takin an sawi. "Gel tam lutuk chu a sir atang hian lakchhuah a ni a, sample te chu 25℃Celsius leh 55% relative humidity ah ni 30 chhung cured a ni. Curing hnuah sample te chu climate chamber 85℃Celsius leh 85% relative humidity ah darkar 1,000 chhung accelerated aging an nei a-a standard test for PV component durability.

Post-test analysis-ah chuan gel hian backsheet chi pangaah hian exceptional adhesion a lantir vek a, sample tinah 100% cohesive failure hmuh a ni. Hei hian gel leh backsheet inkara inzawmna chu gel ngei aiin a chak zawk tih a tilang a, hei hian hun rei tak-reliability leh delamination do theihna a nemnghet a ni.

 

Kum riat-kum -a upa degraded panel-ah test rawh

A dawtah chuan gel hi kum riat chhung zet AAA backsheet hmanga PV module upa tawhah test a ni a, a chhe tawhna chhinchhiahna na tak a awm a, cell busbars chunglam deep longitudinal crack leh surface brittleness te pawh a tel. Gel chu precision cartridge hmangin crack-ah direct-in an dah a, chutah chuan backsheet surface zawng zawngah spatula zau tak hmangin a rualin an theh darh a, protective coating an siam a ni. Chumi hnuah chuan module siam thatte chu climate chamber khatah darkar 1,000 chhung damp heat treatment atan dah a ni.

Kum upa lam hnua tehna an neihah chuan crack te chu a seal kim vek tawh a, hmuh tur a awm tawh lo tih hmuhchhuah a ni a, siamthat tawh module te hian insulation resistance value 200 MΩ- aia sang an nei a, PV module hnathawhna atana himna mamawh aia tam an nei bawk. "Accelerated damp heat test hnuah pawh module-te hian insulation performance sang tak an vawng reng a, wet leakage test-ah pawh moisture ingress chhinchhiahna a awm lo," tiin zirchiangtute chuan an sawi. Hei hian gel hian aging module-a himna leh performance metric pawimawh tak takte a siam ṭhat theihna chu a nemnghet a ni.

 

Solar plant kalpui mek ah test a ni

Real-world performance tihdik nan research team chuan Czech Republic-a 10MW solar plant-ah repair technique hi an hmang a, chutah chuan module tam tak chuan backsheet degradation an tawk tawh a ni. "Polysiloxane gel hi field-ah hman a ni a, handheld cartridge atanga module-dispensed te chu tihchhiat lohvin, backsheet surface chungah spatula hmangin smoothed a ni," tiin team chuan an sawi uar hle. "Module siam that te hi khawvel dinhmun tak takah thla thum chhung thawk turin dah a ni a, temperature hrang hrang, humidity leh UV radiation hrang hrangah an awm a ni."

Field trial neih zawha wet leakage test an neihah chuan module siamṭhat tawhte hian insulation resistance sang tak an vawng reng a, a pangngaiin an thawk tih an finfiah a, module chhiat lohte nena khaikhin chuan energy output tlahniam a awm lo. "Field result hmasa berah chuan gel hian module performance a ti nghet hle tih a tarlang a, mahse a durability kimchang taka zirchian nan kum engemawzat chhung long-term testing neih a ngai a ni," tiin zirchiangtute chuan an sawi. "Zawhna pawimawh tak la awm chu backsheet siam that hi original-in hun rei tak-term moisture barrier performance nen a inmil thei em tih hi a ni a, a bik takin khaw lum lutuk awmna hmunah te a ni.

He zirchianna hi Journal of Photovoltaics Research-a paper "Field-applicable polysiloxane gel repair for degraded photovoltaic module backsheets"-ah tihchhuah a ni. Research group-ah hian Siltech Solutions Czech Republic, Austrian Research Institute for Chemistry and Technology (OFI), leh Czech Technical University in Prague-a scientist-te an tel a, PV maintenance solutions man to-effective, sustainable siam tura thawhhona tha tak an neihnaah an innghat a ni.