化工原理实验
Cp=4.174KJ/kg/K,λ=0.640/W m K跨膜通量
N
m1 m21801.4 1799.6
1.2g/(m2 s) A300 0.005 uf
1.0/1000/60
0.139m/s
0.002 0.06 3600
-1-1
对TPC:
de
2ab2 0.002 0.06
0.00387ma b0.002 0.06
Ref
deu
0.00387 0.139 990cp 4.174 0.600
887Pr 3.91f0.6780.330.6780.33
0.600 10 3 0.640 Nu 0.19RePr 0.19 887 3.91 29.71
f
km
Nu 29.71 0.640 4913de0.00387 同理可解出: p=3942
(tp tf f/ p) ftf N
km
1100 (20.5 44.2 4913/3942) 44.2 4913 1.2 2396.8
40.3
1100 3942 (1 1100/4913)
tfm
p(1
km
p
)
TPC
tfm tpmtf tp
40.3 25.4
0.629
44.2 20.5
tpm 25.4
℃ 则
pfm exp(9.3876
3826.36
) 9222.50kPa
273.15 44.2 45.47 ppm 2405.30kPa
以第一组数据为例进行计算:
在44.2℃时,水的基本参数ρ=990kg/m,μ=0.600mPa S Cp=4.174KJ/kg/K,λ=0.64
以第一组为例进行计算:tfm=46.5℃, tpm=25.3℃
Tm 273.15
tfm tpm
2
273.15
46.5 25.3
309.052
3
pfm exp(23.231
3843384338433843) exp(23.231 ) 10287.1pfm exp(23.231 ) exp(23.231 ) 3191.5
tfm 273.15 4546.5 273.15 45tpm 273.15 4525.3 273.15 45
pi pfm ppm 10287.1 3193.5 7095.6
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