气体套管换热器传热实验

测定传热系数

实验计算内容 R(mmH2O)3

1 1.6 2.89 2.99 30.1 69.0 104.0 38.9 49.6 52.0 3.16 0.038 0.0093 5.953 6.874 3.446 3683.8 4.7 4.89 5.07 30.7 66.8 104.0 36.1 48.8 53.2 5.34 0.059 0.0145 9.216 10.641 5.828 6230.5

2 7.7 6.23 6.45 31.4 65.4 104.0 34.0 48.4 53.8 6.79 0.071 0.0172 10.965 12.661 7.415 7926.9

3 10.7 7.32 7.58 32.7 64.5 104.0 31.8 48.6 53.8 7.98 0.078 0.0189 12.046 13.909 8.718 9319.5

4 15.7 8.84 9.15 34.1 64.0 104.0 29.9 49.1 53.6 9.65 0.089 0.0215 13.719 15.841 10.535 11261.4

5 23.0 10.66 11.03 36.0 63.2 104.0 27.2 49.6 53.2 11.65 0.098 0.0237 15.114 17.452 12.724 13601.6

6

V20(m /h)3

Vt(m /h) t1(°C) t2(°C) T(°C) △t=t2-t1 (t2+t1)/2(°C) △tm(°C) V(平均)m3/h Q(KW) ai≈K(KW/m2) Nu Nu/pr0.4 u(平均) Re 准数关联式

t1平均：32.5°C,密度(t1):1.164kg/m3,密度(20):1.205kg/m3,Cp=1.005KJ/(kg*C)

气体套管换热传热实验100.000

y = 0.001x + 3.723 10.000 气体套管换热传热实 验 线性 (气体套管换热传 热实验)

1.000 1.0 10.0 100.0 1000.0 10000.0 100000.0

实验计算内容R（mmH2O）V20(m3/h)Vt(m3/h)t1(°C)t2(°C)T(°C)△t=t2-t1(t2+t1)/2(°C)△tm(°C)V(平均)m3/hQ(KW)

ai≈K（KW/m2）Nu

Nu/pr0.4u（平均）Re

准数关联式

11.62.892.9930.169.0104.038.949.652.03.160.0380.00935.9536.8743.4463683.8

4.74.895.0730.766.8104.036.148.853.25.340.0590.01459.21610.6415.8286230.5

2

7.76.236.4531.465.4104.034.048.453.86.790.0710.017210.96512.6617.4157926.9

3

3

10.77.327.5832.764.5104.031.848.653.87.980.0780.018912.04613.9098.7189319.5

4

15.78.849.1534.164.0104.029.949.153.69.650.0890.021513.71915.84110.53511261.4

3

5

23.010.6611.0336.063.2104.027.249.653.211.650.0980.023715.11417.45212.72413601.6

6

t1平均：32.5°C，密度（t1）：1.164kg/m,密度（20）：1.205kg/m,Cp=1.005KJ/(kg*C)