空氣電磁加熱器影響因素

      1.增大空氣加熱器的氣體入口流速，能夠加強空氣電加熱器對流換熱(re)(re)(re)(re)，而(er)降低了(le)空氣加熱(re)(re)(re)(re)器內電(dian)熱(re)(re)(re)(re)元件表面溫度，不僅有利于(yu)延長空氣加熱(re)(re)(re)(re)器電(dian)熱(re)(re)(re)(re)元件的使用(yong)壽命，而(er)且(qie)使得(de)空氣電(dian)加熱(re)(re)(re)(re)器散(san)熱(re)(re)(re)(re)損失減小(xiao)，因而(er)空氣換熱(re)(re)(re)(re)器的效(xiao)率提(ti)高了(le)，但速度如果過大，使得(de)壓力(li)損失陡增，這將不利于(yu)加熱(re)(re)(re)(re)效(xiao)率的提(ti)高。

     ;2.若其它條件不變(bian)(bian)，改(gai)變(bian)(bian)表面(mian)負(fu)荷，空(kong)(kong)氣(qi)(qi)(qi)加(jia)熱(re)器(qi)中(zhong)電(dian)熱(re)元(yuan)(yuan)件的壁(bi)(bi)溫將(jiang)(jiang)呈直線(xian)變(bian)(bian)化，如果(guo)表面(mian)負(fu)荷增(zeng)大(da)，電(dian)熱(re)元(yuan)(yuan)件的壁(bi)(bi)溫將(jiang)(jiang)增(zeng)大(da)，這將(jiang)(jiang)降低(di)空(kong)(kong)氣(qi)(qi)(qi)加(jia)熱(re)器(qi)中(zhong)電(dian)熱(re)元(yuan)(yuan)件的使用壽命，但(dan)是(shi)如果(guo)表面(mian)負(fu)荷過(guo)(guo)小，壁(bi)(bi)溫過(guo)(guo)低(di)，空(kong)(kong)氣(qi)(qi)(qi)加(jia)熱(re)器(qi)換(huan)熱(re)器(qi)的效率又(you)降低(di)了，所以空(kong)(kong)氣(qi)(qi)(qi)加(jia)熱(re)器(qi)中(zhong)電(dian)熱(re)元(yuan)(yuan)件的表面(mian)負(fu)荷的選(xuan)擇比較(jiao)重要。

     3.空(kong)(kong)氣(qi)(qi)(qi)加熱(re)(re)(re)器(qi)中(zhong)空(kong)(kong)氣(qi)(qi)(qi)終溫T2提高(gao)時(shi)(shi)，由(you)于(yu)空(kong)(kong)氣(qi)(qi)(qi)粘性(xing)增加，氣(qi)(qi)(qi)體雷諾數減小，使(shi)得對(dui)流(liu)換熱(re)(re)(re)強度(du)降(jiang)低，空(kong)(kong)氣(qi)(qi)(qi)加熱(re)(re)(re)器(qi)中(zhong)電(dian)(dian)熱(re)(re)(re)元(yuan)(yuan)(yuan)件(jian)(jian)(jian)的(de)(de)表面溫度(du)同時(shi)(shi)上(shang)升(sheng)，紅(hong)外碳硫分析儀使(shi)得散熱(re)(re)(re)損失增加，從而降(jiang)低換熱(re)(re)(re)器(qi)的(de)(de)效(xiao)率。當T2提高(gao)過大時(shi)(shi)，電(dian)(dian)熱(re)(re)(re)元(yuan)(yuan)(yuan)件(jian)(jian)(jian)表面的(de)(de)溫度(du)亦會大大升(sheng)高(gao)，致使(shi)一(yi)般(ban)電(dian)(dian)熱(re)(re)(re)元(yuan)(yuan)(yuan)件(jian)(jian)(jian)無(wu)法承受，故T2的(de)(de)增加通常受到空(kong)(kong)氣(qi)(qi)(qi)加熱(re)(re)(re)器(qi)中(zhong)電(dian)(dian)熱(re)(re)(re)元(yuan)(yuan)(yuan)件(jian)(jian)(jian)材(cai)料耐熱(re)(re)(re)性(xing)能的(de)(de)限制。