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(huan)熱(re)(re)(re)，而降(jiang)低了空(kong)氣加熱(re)(re)(re)器內電(dian)(dian)熱(re)(re)(re)元件(jian)表面溫度，不(bu)僅有(you)利于延長空(kong)氣加熱(re)(re)(re)器電(dian)(dian)熱(re)(re)(re)元件(jian)的使(shi)用壽命(ming)，而且使(shi)得空(kong)氣電(dian)(dian)加熱(re)(re)(re)器散熱(re)(re)(re)損失減小，因而空(kong)氣換(huan)熱(re)(re)(re)器的效率提高了，但(dan)速度如果過大，使(shi)得壓力損失陡增(zeng)，這將不(bu)利于加熱(re)(re)(re)效率的提高。

     2.若其它條件(jian)(jian)不變，改變表(biao)面(mian)(mian)(mian)負(fu)荷(he)(he)，空(kong)(kong)氣(qi)加熱(re)器(qi)中電熱(re)元件(jian)(jian)的(de)(de)壁(bi)(bi)溫(wen)將呈直線變化(hua)，如(ru)果表(biao)面(mian)(mian)(mian)負(fu)荷(he)(he)增(zeng)大，電熱(re)元件(jian)(jian)的(de)(de)壁(bi)(bi)溫(wen)將增(zeng)大，這將降低(di)(di)(di)空(kong)(kong)氣(qi)加熱(re)器(qi)中電熱(re)元件(jian)(jian)的(de)(de)使用(yong)壽(shou)命(ming)，但是如(ru)果表(biao)面(mian)(mian)(mian)負(fu)荷(he)(he)過小，壁(bi)(bi)溫(wen)過低(di)(di)(di)，空(kong)(kong)氣(qi)加熱(re)器(qi)換(huan)熱(re)器(qi)的(de)(de)效(xiao)率(lv)又降低(di)(di)(di)了，所(suo)以空(kong)(kong)氣(qi)加熱(re)器(qi)中電熱(re)元件(jian)(jian)的(de)(de)表(biao)面(mian)(mian)(mian)負(fu)荷(he)(he)的(de)(de)選擇比較重要(yao)。

     3.空(kong)(kong)(kong)(kong)氣(qi)(qi)加熱(re)(re)(re)器(qi)中空(kong)(kong)(kong)(kong)氣(qi)(qi)終溫(wen)T2提(ti)高(gao)時，由于空(kong)(kong)(kong)(kong)氣(qi)(qi)粘性增(zeng)加，氣(qi)(qi)體雷諾數減小，使(shi)得對流換熱(re)(re)(re)強度(du)降低，空(kong)(kong)(kong)(kong)氣(qi)(qi)加熱(re)(re)(re)器(qi)中電(dian)熱(re)(re)(re)元(yuan)(yuan)件(jian)(jian)的(de)(de)(de)表(biao)面溫(wen)度(du)同(tong)時上升(sheng)，紅外(wai)碳硫分析儀(yi)使(shi)得散熱(re)(re)(re)損失增(zeng)加，從而降低換熱(re)(re)(re)器(qi)的(de)(de)(de)效率。當T2提(ti)高(gao)過大(da)時，電(dian)熱(re)(re)(re)元(yuan)(yuan)件(jian)(jian)表(biao)面的(de)(de)(de)溫(wen)度(du)亦會大(da)大(da)升(sheng)高(gao)，致(zhi)使(shi)一(yi)般電(dian)熱(re)(re)(re)元(yuan)(yuan)件(jian)(jian)無法承受，故T2的(de)(de)(de)增(zeng)加通常受到空(kong)(kong)(kong)(kong)氣(qi)(qi)加熱(re)(re)(re)器(qi)中電(dian)熱(re)(re)(re)元(yuan)(yuan)件(jian)(jian)材料耐熱(re)(re)(re)性能(neng)的(de)(de)(de)限制。