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1、五、实验数据记录及处理表一简单套管换热器数据传热管内径：18mm传热管有效长度：1m冷流体：空气热流体：水蒸气序号12345空气流量读数?P(kPa)0.510.781.323.12空气入口温度 t1()30.632.333.836.438.9空气出口温度 t2()64.163.762.662.462.3壁温 tw()63.363.663.564.164.2空气在 t1 时的密度 t1(kg/m3）1.1631.1571.1511.1411.132空气平均温度 tm（）47.354848.249.450.6空气在入口处流量 Vt1(m3/h)16.20820.04525.87732.09740
2、.089空气平均流量 Vtm(m3/h)17.10221.07527.09233.44641.593空气平均流速 utm（m/s)18.67823.01729.58936.52845.426 m(kg/m3)1.1011.0991.0981.0941.090空气在 m*105(Pas)1.9491.9521.9531.9591.965平均温度时的 m*102(W/m）2.8142.8192.8212.8302.840物性Cp(kJ/kg）1.0051.0051.0051.0051.005空气进出口温度之差 t2-t1()33.531.428.82623.4壁面和空气的温差 tw-tm（）15.
3、9515.615.314.713.6空气得到的热量 Q（kW）0.1760.2030.2390.2660.296空气侧对流传热系数195.330230.195276.554319.563385.112 i(W/m2.）Re18990.20323315.29029937.36036707.54345340.885Nu124.930146.965176.464203.233244.112Pr0.6960.6960.6960.6960.695Nu/(Pr0.4)144.415169.899204.007234.988282.297Nu/(Pr0.3)139.276163.850196.742226.
4、612272.224图一图二表二64.7944.464.364.31.11254.3549.67351.23055.9511.0771.9832.8691.00519.99.950.306544.82154682.901341.8320.695395.480381.326强化套管换热器数据传热管内径：18mm传热管有效长度：1m冷流体：空气热流体：水蒸气序号12345空气流量读数?P(kPa)0.340.530.831.322.03空气入口温度 t1()34.432.732.834.437.5空气出口温度 t2()82.181.180.179.178.7壁温 tw()64.564.464.46
5、4.664.7空气在 t1 时的密度 t1(kg/m3）1.1491.1551.1551.1491.137空气平均温度 tm（）58.2556.956.4556.7558.1空气在入口处流量 Vt1(m3/h)13.23416.52320.67726.07632.337空气平均流量 Vtm(m3/h)14.26117.83122.27627.97234.482空气平均流速 utm（m/s)15.57519.47424.32930.54937.660 m(kg/m3)1.0631.0681.0691.0681.064空气在平 m*105(Pas)2.0011.9951.9931.9942.001
6、均温度时 m*102(W/m）2.8992.8892.8852.8882.898的物性Cp(kJ/kg）1.0051.0051.0051.0051.00563.1543.979.965.11.11361.940.28142.56946.4921.0512.0192.9281.005空气进出口温度之差 t2-t1()47.748.447.3壁面和空气的温差 tw-tm（）6.257.57.95空气得到的热量 Q（kW）0.2020.2570.315空气侧对流传热系数571.662606.961700.088i(W/m2.）Re14895.97918764.80923501.410Nu354.921378.205436.762Pr0.6940.6940.694Nu/(Pr0.4)410.816437.696505.437Nu097.046119.204145.650Nu/Nu03.6573.1732.999图三图四图五44.77.850.373840.54929461.052523.9680.694606.376178.0962.94241.26.60.422363.20.4501131.1312486.94136048.127702.5540.694813.181213.0973.29743584.0031529.0990.6931770.672252.2086.063