保温层厚度的“经济厚度”简算法１保温层厚度的确定１．１保温层表面至周围空气之间总的给热系数ａ＿０的确定ａ＿０＝ａ＿ｒ＋ａ＿ｋ（ｋｃｏｌ／ｍ￣２·ｈ·℃）ａ＿ｋ─管道或保温层辐射换热系数（ｋｃａｌ／ｍ￣２·ｈ·℃）（ｋｃａｌ／ｍ￣２·ｈ·℃）式中：ｔ＿... Insulation thickness of the “economic thickness” simple algorithm 1 Determination of insulation thickness 1.1 Insulation layer surface to the surrounding air to determine the total heat coefficient a_0 a_0 = a_r + a_k (kcol / m ~ 2 · h · ℃) a_k ─ pipe or insulation radiation heat transfer coefficient (kcal / m ~ 2 · h · ℃) (kcal / m ~ 2 · h · ℃) Where: t _...