有一炉壁,由下列三种材料组成: 耐火砖 1 =1.4W·m -1 ·K -1 , b 1 =230mm 保温砖 2 =0.15W·m -1 ·K -1 , b 2 =115mm 建筑砖 3 =0.8W·m -1 ·K -1 , b 3 =230mm 今测得其内壁温度为 900 °C ,外壁温度为 80 °C ,求单位面积的单位热损失和各层接触面上的温度。
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