MECA 1855 Thermodynamique et Energ´etique
Les ´echangeurs de chaleur : la m´ethode epsilon - NTU
Echangeurs `a courants parall`eles
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Cmin/C
max = 0
0.25
0.5 0.75 1
Number of transfer units NTU = AU/C
min
Effefctiveness ε
Echangeurs `a contre-courants
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Cmin
/Cmax
= 0 0.25 0.5
0.75 1
Number of transfer units NTU = AU/Cmin
Effefctiveness ε