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断熱層の計算について、専門家の方にアドバイスをお願いします。なぜいつも小数点が1つ足りないように感じるのでしょうか!!!

2016-10-27View Original

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file:///D:\Documents\Tencent Files\437561288\Image\Group\)3HCGDDT~KC81~UJAXLKXWK.pngfile:///D:\Documents\Tencent Files\437561288\Image\Group\`U@EH4NLGBV@7N7I_MC6XE.jpgどなたか教えてください。なぜいつも小数点が1つ足りないように感じるのでしょうか??? 単位の違いはどこにあるのでしょうか?
Reply #22016-10-27
δ2=λ/αs(to-ts)/(ts-t0) 灼傷防止用断熱計算式 二重断熱 アルミノシリケート 565–300
δ1 = 0.013071375 断熱層の厚さ(m)
λ1 = 0.1285 断熱材の熱伝導率(W/(m*℃))
αs = 8.141 断熱層の外表面からの放熱係数(W/(m²*℃))
to = 565 装置の外表面温度(℃)
ta = -20 環境温度(℃)
ts = 300 断熱層の外表面温度(℃)

岩綿の場合:300–60
δ2 = 0.025205749 断熱層の厚さ(m)
λ2 = 0.0684 断熱材の熱伝導率(W/(m*℃))
αs = 8.141 断熱層の外表面からの放熱係数(W/(m²*℃))
to = 300 装置の外表面温度(℃)
ta = -20 環境温度(℃)
ts = 60 断熱層の外表面温度(℃)

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