常用材料导热系数-中文.doc

材料的导热系数 日期:2007-2-17 22:28:48 来源:来自网络 查看:大 中 小 作者：不详 热度： 1889附录A 材料的导热系数(l) A.0.1 表A.0.1中给出材料的导热系数。表 A.0.1 常用材料的导热系数用途材料密度(kg/m3)导热系数(W/mK)窗框铜8900380铝 (硅合金)2800160黄铜8400120铁780050不锈钢790017PVC13900.17硬木7000.18软木 (常用于建筑构件中)5000.13玻璃钢(UP树脂)19000.40玻璃碳酸钙玻璃25001.0PMMA (有机玻璃)11800.18聚碳酸脂12000.20热断桥聚冼氨 (尼龙)11500.25尼龙 6.6和25%玻璃纤维14500.30高密度聚乙烯HD9800.50低密度聚乙烯 LD9200.33固体聚丙烯9100.22带有25%玻璃纤维的聚丙烯12000.25PU (聚亚氨脂树脂)12000.25刚性PVC13900.17防雨氯丁橡胶 (PCP)12400.23密封条EPDM (三元乙丙)11500.25纯硅胶12000.35柔性PVC12000.14聚脂马海毛0.14柔性人造橡胶泡末60800.05密封剂PU (刚性聚氨脂)12000.25固体/热融异丁烯12000.24聚硫胶17000.40纯硅胶12000.35聚异丁烯9300.20聚脂树脂14000.19硅胶（干燥剂）7200.13分子筛650 to 7500.10低密度硅胶泡末7500.12中密度硅胶泡末8200.17附录B 气体热物理性能B.0.1下列表的线性公式系数，计算填充空气、氩气、氮气、氙气四种气体空腔的导热系数、粘度和常压比热容。传热计算时，假设所充气体是不辐射/吸收的气体。表B.1气体的导热系数气体系数aW/(mk)系数bW/(mk2)（0时）W/(mk)（10时）W/(mk)空气2.87310-37.76010-50.02410.0249氩气2.28510-35.14910-50.01630.0168氪气9.44310-42.82610-50.00870.0090氙气4.53810-41.72310-50.00520.0053其中：W/m.K表B.2气体的粘度气体系数aNS/m2系数bNS/(m2k2)（0时）（10时）空气3.72310-64.94010-81.72210-51.77110-5氩气3.37910-66.45110-82.10010-52.16510-5氪气2.21310-67.77710-82.34610-52.42310-5氙气1.06910-67.41410-82.13210-52.20610-5其中：kg/m.s表B.3气体的常压比热容气体系数aJ/(kgk)系数bJ/(kgk2)Cp（0时）Cp （10时）空气1002.73701.232410-21006.10341006.2266氩气521.92850521.9285521.9285氪气248.09070248.0917248.0917氙气158.33970158.3397158.3397其中：J/(kgk)表B.4 气体的摩尔质量气体Kg/KmoL空气28.97氩气39.948氪气83.80氙气131.30附录C 校准发射率的确定C.0.1 标准发射率n的确定： 镀膜表面的标准发射率n应在接近正常入射状况下利用红外谱仪测出其谱线的反射曲线，并应按照下列步骤计算出来：按照表A.1给出的30个波长值，测定相应的反射系数Rn(i)曲线，取其数学平均值，得到283K温度下的常规反射系数。（C.0.1-1）283K的常规发射率由下式给出：（C.0.1-2）C.0.2 校正发射率的确定：用表C.2给出的系数乘以常规发射率n即得出校正发射率。表C.1 用于测定283K下标准反射率Rn的波长（单位；微米）序号波长序号波长15.51614.826.71715.637.41816.348.11917.258.62018.169.22119.279.72220.3810.22321.7910.72423.31011.32525.21111.82627.71212.42730.91312.92835.71413.52943.91514.23050.01)2)表C.2 校正发射率与标准发射率之间的关系n标准发射率n系数/n1)0.031.220.051.180.11.140.21.100.31.060.41.030.51.000.60.980.70.960.80.950.890.941)其它值可以通过线性插值或外推获得附录D 太阳光谱、标准光源、视见函数光谱数据表D.0.1 D65标准光源、视见函数、光谱间隔乘积nmnm3800.00006005.35423900.00056104.24914000.00306203.15024100.01036302.08124200.03526401.38104300.09486500.80704400.22746600.46124500.41926700.24854600.66636800.12554700.98506900.05364801.51897000.02764902.13367100.01465003.34917200.00575105.13937300.00355207.05237400.00215308.79907500.00085409.44577600.00015509.80777700.00005609.43067800.00005708.68915807.89945906.3306注：表中的数据为D65光源标准的相对光谱分布D乘以视见函数V()以及波长间隔。表D.0.2 地面上标准的太阳辐射相对光谱分布（nm）（nm）30006800.0128383050.0000576900.0117883100.0002367000.0124533150.0005547100.0127983200.0009167200.0105893250.0013097300.0112333300.0019147400.0121753350.0020187500.0121813400.0021897600.0095153450.0022607700.0104793500.0024457800.0113813550.0025557900.0112623600.0026838000.0287183650.0030208500.0482403700.0033599000.0402973750.0035099500.0213843800.00360010000.0360973850.00352910500.0341103900.00355111000.0188613950.00429411500.0132284000.00781212000.0225514100.01163812500.0233764200.01187713000.0177564300.01134713500.0037434400.01324614000.0007414500.01534314500.0037924600.01616615000.0096934700.01617815500.0136934800.01640216000.0122034900.01579416500.0106155000.01580117000.0072565100.01597317500.0071835200.01535718000.0021575300.01586718500.0003985400.01582719000.0000825500.01584419500.0010875600.01559020000.0030245700.01525620500.0039885800.01474521000.0042295900.01433021500.0041426000.01466322000.0036906100.01503022500.0035926200.01485923000.0034366300.01462223500.0031636400.01452624000.0022336500.01444524500.0012026600.01431325000.0004756700.014023注：空气质量为1.5时地面上标准的太阳辐射（直射散射）相对光谱分布出自Table 1，column 5，ISO 9845-1:1992。表中数据为标准的相对光谱乘以波长间隔。表D.0.3 地面上太阳辐射紫外线部分的标准相对光谱分布（nm）30003050.0018593100.0076653150.0179613200.0297323250.0424663300.02621083350.065