换热器传热系数的测定实验报告.docx

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1、原始数据记录编号123456789热水流量(L/h)808080808080808080T进/℃150505059596069707024949505960597070703505050605960696970平均49.749.750.059.359.359.769.369.770.0T出/℃145.845.644.953.452.753.862.262.462.5245.044.745.453.153.652.762..562.662.1346.045.445.053.753.453.362.061.762.6平均45.645.245.153.4

2、53.253.362.162.262.4冷水流量(L/h)60.080.096.064.080.096.064.080.088.0t进/℃117.917.918.018.118.218.319.018.919.2217.918.018.018.118.318.419.018.919.1317.918.018.018.118.318.418.819.019.0平均17.918.018.018.118.318.418.918.919.1t出/℃122.621.620.924.023.022.426.625.024.5222.521.421.024.02

3、3.122.226.425.124.5322.721.520.924.022.922.326.324.924.5平均22.621.520.924.023.022.326.425.024.5数据处理物理量单位数值Vh×10-5m3/s2.222.222.222.222.222.222.222.222.22Tm℃47.647.547.656.456.356.565.766.066.2tm℃20.319.719.521.120.620.322.722.021.8玻璃导热系数1.09热水密度kg/m3988冷水密度kg/m3998热水Cp,h4.174冷水

4、Cp,c4.183热水λh0.6480.6480.6480.6480.6480.6480.6480.6480.648冷水λc0.60.60.60.60.60.60.60.60.6热水μh0.0.0.0.0.0.0.0.0.热水Prh-3.543.543.543.543.543.543.543.543.54冷水μc0.0010.0010.0010.0010.0010.0010.0010.0010.001冷水Prc-6.976.976.976.976.976.976.976.976.97dimm6bmm1QhW372.68406.28449.05543

5、.75559.02586.51662.88681.21696.48QcW327.01327.79326.55437.87439.11437.87556.62562.80551.05平均QW349.85367.03387.80490.81499.06512.19609.75622.01623.77换热面积Am20.030.030.030.030.030.030.030.030.03Δtm℃27.3827.7128.0735.3235.6536.1243.0343.9844.39uhm/s0.790.790.790.790.790.790.790.79

6、0.79Reh-849184918491849184918491849184918491ucm/s0.024450.03260.039120.026080.03260.039120.026080.03260.03586Rec-879879879879879879879879879αh5048.455048.455048.455048.455048.455048.455048.455048.455048.45αc100010001000100010001000100010001000Ke425.88441.45460.48463.25466.6947

7、2.69472.31471.43468.39K(理论值)472.70472.70472.70472.70472.70472.70472.70472.70472.70偏差ΔK-9.90%6.61%2.58%2.00%1.27%0.00%0.08%0.27%0.91%下标说明：h——热水；c——冷水；i——内；m——平均值；e——实验值