常用材料导热系数-中文

1、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：囹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/mx K）铜8900380铝（硅合金）2800160黄铜8400120铁780050窗框不锈钢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碳酸钙玻璃25001.0玻璃PMMA有机玻璃）11800.18聚碳酸脂12000.20聚冼氨（尼龙）11500.25尼龙6

2、.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热断桥固体聚丙烯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）12400.23EPDM三元乙丙）11500.25纯硅胶12000.35密封条柔性PVC12000.14聚脂马海毛0.14柔性人造橡胶泡末60 800.05PU （刚性聚氨脂）12000.25密封剂固体/热融异丁烯12000.24170012009301400720650 to 7507508200.400.350.200.190.130.10

3、0.120.17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a系数b入（0C时）入（10C时）W/(m- k)W/(m- k2)W/(m- k)W/(m- k)空气2.873 X10-37.760 X10-50.02410.0249氩气2.285 X10-35.149 X10-50.01630.0168氪气9.443 X10-42.826 X10-50.00870.0090氙气4.538 X10-41.723 X10-50.00520.0

4、053其中：Jl = a T(K)W/m.K表B.2气体的粘度气体系数a系数bn (0C时)n (10C时)N- S/m2N - S/(m2 - k2)空气3.723 X10-64.940 X10-81.722 X10-51.771 X10 -5氩气3.379 X10-66.45 1X10-82.100 X10-52.165 X10 -5氪气2.213 X10-67.777 X10-82.346 X10-52.423 X10 -5氙气1.069 X10-67.414 X10-82.132 X10-52.206 X10 -5其中：“=a+dT(&kg/m.s表B.3气体的常压比热容气体系

5、数a系数bCp(0C 时)Cp (10C 时)J/(kg k)J/(kg k2)空气1002.73701.2324 X10-21006.10341006.2266氩气521.92850521.9285521.9285氪气248.09070248.0917248.0917氙气158.33970158.3397158.3397其中：'=a+b T(k)J/(kg k)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

6、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(入i)曲线，取其数学平均值，得到283K温度下的常规反射系数。1 30&二环为凡S)-'-1(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15.51614.826.71715.637.41816.348.11917.258.62018.169.2

7、2119.279.72220.3810.22321.7910.72423.31011.32525.21111.82627.71212.42730.91312.92835.71413.52943.91514.23050.01)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 D

8、65标准光源、视见函数、光谱间隔乘积2nm2nm2卩 A2xio33800.00006005.35423900.00056104.24914000.00306203.15024100.01036302.08124200.03526401.38104300.09486500.80704400.22746600.46124500.41926700.24854600.66636800.12554700.98506900.05364801.51897000.02764902.13367100.01465003.34917200.00575105.13937300.00355207.05237400.0

9、0215308.79907500.00085409.44577600.00015509.80777700.00005609.43067800.00005708.68915807.89945906.3306注：表中的数据为 D65光源标准的相对光谱分布D入乘以视见函数 V入）以及波长间隔入。表D.0.2地面上标准的太阳辐射相对光谱分布(nm)00.0000570.0002360.0005540.0009160.0013090.0019140.0020180.0021890.0022600.0024450.0025550.0026830.0030200.0033590.0035090.003600

10、0.0035290.0035510.0042940.0078120.0116380.0118770.0113470.0132460.0153430.0161660.0161780.0164020.0157940.0158010.0159730.0153570.0158670.0158270.0158440.0155906800.0128386900.0117887000.0124537100.0127987200.0105897300.0112337400.0121757500.0121817600.0095157700.0104797800.0113817900.0112628000.028

11、7188500.0482409000.0402979500.02138410000.03609710500.03411011000.01886111500.01322812000.02255112500.02337613000.01775613500.00374314000.00074114500.00379215000.00969315500.01369316000.01220316500.01061517000.00725617500.00718318000.00215718500.00039819000.00008219500.00108720000.003024(nnj)3003053

12、103153203253303353403453503553603653703753803853903954004104204304404504604704804905005105205305405505605700.01525620500.0039885800.01474521000.0042295900.01433021500.0041426000.01466322000.0036906100.01503022500.0035926200.01485923000.0034366300.01462223500.0031636400.01452624000.0022336500.01444524500.0012026600.01431325000.0004756700.014023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U( nm30003050.0018593100.0076653150.0179613200.0297323250.0424663300.02621083350.065462