1980年前,当英国制冷协会(现制冷学会)成立时,隔泵层的厚度是按下述规则:即每10℉温差采用1英寸软木(K=0.3英热单位/英尺~2时.℉)进行计算。这条规则反映在现已失效的 CP·406(1952)中。在目前国际单位时代,软木的导热系数λ=0.0432瓦/米·K,其热渗入量为 q_渗=9.46瓦/米~2,当采用其他商品代替软木等量厚度隔热时,与设计规范要。 Before 1980 when the British Council (now Institute of Refrigeration) was established, the thickness of the plenum was based on the rule that 1 inch of softwood per 10 ° F temperature difference (K = 0.3 Btu / ft 2 ° F )Calculation. This rule is reflected in the now invalid CP · 406 (1952). In the current international unit era, the coefficient of thermal conductivity of cork is λ = 0.0432 W / m · K, the heat infiltration is q_ = 9.46 W / m ~ 2. When using other products instead of cork insulation, Normative