EN 13501-2 雙玻光伏板做 EN 13501-2 耐火測(cè)試的難點(diǎn)是什么

雙玻光伏板做EN13501-2耐火測(cè)試的難點(diǎn)是什么？雙玻光伏板的結(jié)構(gòu)：玻璃蓋板、封裝材料、太陽(yáng)能電池片、玻璃背板、邊框、接線盒根據(jù)結(jié)構(gòu)可以雙玻光伏板的結(jié)構(gòu)上下都為玻璃，故而做耐火測(cè)試要考慮的主要有幾個(gè)問(wèn)題玻璃破裂問(wèn)題：雙玻光伏板的兩片玻璃在高溫火焰作用下容易破裂。玻璃的熱膨脹系數(shù)與內(nèi)部電池片和封裝材料不同，在受熱時(shí)，由于各材料的膨脹程度不一致，會(huì)產(chǎn)生內(nèi)部應(yīng)力。當(dāng)這種應(yīng)力超過(guò)玻璃的承受極限時(shí)，玻璃就會(huì)破裂。例如，在火焰溫度快速上升階段，玻璃可能會(huì)因?yàn)榧眲〉臒崤蛎浂霈F(xiàn)裂紋，一旦玻璃破裂，火焰就更容易接觸到內(nèi)部的電池片和封裝材料，改變火災(zāi)的蔓延路徑和速度，增加測(cè)試結(jié)果的不確定性。整個(gè)光伏板受熱彎曲問(wèn)題：太陽(yáng)能電池片在高溫環(huán)境下可能會(huì)出現(xiàn)熱失控現(xiàn)象。當(dāng)電池片溫度過(guò)高時(shí)，其內(nèi)部的電學(xué)性能會(huì)發(fā)生變化，導(dǎo)致整體結(jié)構(gòu)出現(xiàn)彎曲等現(xiàn)象。EN13501-2耐火測(cè)試–標(biāo)準(zhǔn)名稱：EN13501-2建筑產(chǎn)品及構(gòu)件的耐火性能分類，第2部分:通風(fēng)設(shè)備除外耐火試驗(yàn)數(shù)據(jù)分類。EN13501-2Fireclassificationofconstructionproductsandbuildingelements-Part2:Classificationusingdatafromfireresistancetests,excludingventilationservicesEN13501-2耐火測(cè)試–產(chǎn)品適用范圍：無(wú)防火分隔功能的承重元件：墻壁、地板、屋頂、梁、柱、樓梯、具有防火分隔功能的承重元件：墻壁、地板、屋頂、高架地板非承重構(gòu)件或工程部件：隔斷、立面（幕墻）及外墻、防火門及百葉窗、防煙門、輸送系統(tǒng)及其封閉裝置、滲透密封、線性接頭密封、服務(wù)管道和豎井、煙囪EN13501-2耐火測(cè)試–判定依據(jù)：失去完整性：當(dāng)棉墊被點(diǎn)燃或者背火面燃燒達(dá)10秒鐘以上時(shí)，被認(rèn)為試件失去完整性；測(cè)試過(guò)程中，6mm直徑的探棒可穿過(guò)裂縫進(jìn)入爐內(nèi)且探棒可沿裂縫長(zhǎng)度方向不小于150mm；直徑25mm的探棒可穿過(guò)裂縫進(jìn)入爐內(nèi)時(shí)，則被認(rèn)為試件失去完整性。失去隔熱性：試件背火面的平均溫升超過(guò)試件表面初始平均溫度140℃或者背火面在任何一點(diǎn)的溫升超過(guò)該點(diǎn)初始溫度180℃時(shí)，則被認(rèn)為試件失去隔熱性。失去承重性：在試驗(yàn)過(guò)程中試件發(fā)生垮塌；或梁板構(gòu)件的最大撓度、柱構(gòu)件的軸向變形、柱構(gòu)件的軸向變形速率超過(guò)規(guī)定值時(shí)，則被認(rèn)為試件失去承重性。WhatarethedifficultiesindoingEN13501-2fireresistancetestingondouble-glassphotovoltaicpanels?Thestructureofdouble-glassphotovoltaicpanels:Glasscover,packagingmaterials,solarcells,glassback,frame,junctionboxAccordingtothestructure,thedouble-glassphotovoltaicpanelhasglassonboththetopandbottom,sothereareseveralmainissuestoconsiderwhendoingfireresistancetestingGlassbreakageproblem:Thetwopiecesofglassinthedouble-glassphotovoltaicpanelareeasytobreakundertheactionofhigh-temperatureflames.Thethermalexpansioncoefficientofglassisdifferentfromthatoftheinternalbatterycellsandpackagingmaterials.Whenheated,internalstresswillbegeneratedduetotheinconsistentexpansionofeachmaterial.Whenthisstressexceedsthebearinglimitoftheglass,theglasswillbreak.Forexample,duringtherapidriseofflametemperature,theglassmaycrackduetorapidthermalexpansion.Oncetheglassbreaks,theflameismorelikelytocontacttheinternalbatterycellsandpackagingmaterials,changingthespreadpathandspeedofthefire,andincreasingtheuncertaintyofthetestresults.Theentirephotovoltaicpanelisbentduetoheat:Solarcellsmayexperiencethermalrunawayinhightemperatureenvironments.Whenthetemperatureofthecellistoohigh,itsinternalelectricalpropertieswillchange,causingtheoverallstructuretobend.EN13501-2Fireresistancetest–Standardname:EN13501-2Fireclassificationofconstructionproductsandbuildingelements-Part2:Classificationusingdatafromfireresistancetests,excludingventilationservicesEN13501-2Fireresistancetest–Productscope:Load-bearingelementswithoutfireseparationfunction:walls,floors,roofs,beams,columns,stairs,Load-bearingelementswithfireseparationfunction:walls,floors,roofs,raisedfloorsNon-load-bearingcomponentsorengineeringparts:partitions,facades(curtainwalls)andexter