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某燃烧炉的平壁由下列三种砖依次砌成:耐火砖导热系数λ 1 =1.05W/(m·℃)、壁厚b 1 =0.23m绝热砖导热系数λ 2 =0.095W/(m·℃)普通砖导热系数λ 3 =0.71W/(m·℃)、壁厚b 3 =0.24m 若已知耐火砖内侧温度为860℃,耐火砖于绝热砖接触面温度为800℃,而绝热砖与普通砖接触面温度为135℃,试求: (1)通过炉墙损失的热量,W/m 2 (2)绝热砖层厚度,m (3)普通砖外壁温度,℃
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