本文關(guān)鍵詞：基于錐形量熱儀測(cè)試的樹(shù)葉燃燒碳排放研究　出處：《燃燒科學(xué)與技術(shù)》2016年04期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 森林火災(zāi) 碳排放 碳轉(zhuǎn)化率 排放比 錐形量熱儀測(cè)試

【摘要】：運(yùn)用錐形量熱儀模擬開(kāi)放環(huán)境中植物樣品在不同火災(zāi)場(chǎng)合的燃燒場(chǎng)景,檢測(cè)其燃燒過(guò)程中CO和CO_2排放量,進(jìn)而確定其碳轉(zhuǎn)化率和排放比.實(shí)驗(yàn)樣品為針闊葉樹(shù)種葉片共8種;輻射熱流強(qiáng)度分別為35,k W/m2、55,k W/m2、70,k W/m2和85,k W/m2.測(cè)試結(jié)果表明,在設(shè)定的裝載量范圍內(nèi),樣品碳轉(zhuǎn)化率基本不受空間分布密度的影響,并呈現(xiàn)較好的數(shù)據(jù)可重復(fù)性,由此確認(rèn)了檢測(cè)方法的可靠性.因輻射熱流強(qiáng)度和樣品含水量的差異,樹(shù)葉樣品的CO和CO_2的轉(zhuǎn)化率范圍分別為0.01~0.10和0.05~0.85,且隨著輻射熱流強(qiáng)度增大而顯著提升;新鮮樣品含水量的降低促使其由陰燃向明火轉(zhuǎn)變,明火燃燒則會(huì)促進(jìn)CO和CO_2的生成,這與開(kāi)放環(huán)境中樣品熱解產(chǎn)物燃燒反應(yīng)的效率以及碳煙形成有關(guān).
[Abstract]:A cone calorimeter was used to simulate the burning scenes of plant samples in open environment in different fire situations and to detect the CO and CO_2 emissions during combustion. Then the carbon conversion rate and emission ratio were determined. The radiation heat flux is 35 kW / m 2, 55 W / m 2, 70 k W / m 2 and 85 K W / m 2, respectively. The test results show that the radiation heat flux is within the given loading range. The carbon conversion rate of the sample is not affected by the spatial distribution density and has good repeatability. The reliability of the method is confirmed because of the difference of the radiation heat flux intensity and the water content of the sample. The conversion ranges of CO and CO_2 in leaf samples were 0.01g 0.10 and 0.05g 0.85, respectively, and increased significantly with the increase of radiation heat flux. The decrease of water content in fresh samples leads to the transition from smoldering to open fire, which will promote the formation of CO and CO_2, which is related to the combustion efficiency of pyrolysis products and the formation of soot in open environment.
【作者單位】： 中國(guó)科學(xué)技術(shù)大學(xué)火災(zāi)科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;廣東省林業(yè)科學(xué)研究院;
【基金】：廣東省科技創(chuàng)新基金資助項(xiàng)目(2012KJCX018-02)
【分類(lèi)號(hào)】：TK16
【正文快照】： 森林火災(zāi)中排放的CO2等氣體已被確認(rèn)為大氣中溫室效應(yīng)氣體主要來(lái)源之一[1].目前,估算碳排放量的方法均由生物質(zhì)儲(chǔ)量出發(fā),通過(guò)判斷燃燒消耗量,再結(jié)合CO和CO2排放因子(或與之相關(guān)的排放比),來(lái)計(jì)算特定林區(qū)已有或潛在森林火災(zāi)的碳排放量[2-5].其中CO與CO2排放因子是森林火災(zāi)碳排，

本文編號(hào)：1368693