Page 235 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

225

M5
• = 037 + 4.5E6 Fr{-"(ad,)~ (114)
a

The influence of Re L is to be neglected. The precision of the experimental
constants in this equation is represented in Table 15.
A comparison between the experimental and calculated data is
presented in Fig. 30. The mean arithmetic error of Eq.{114) is 4.5%. The
maximal deviation is not more than 10%.
To calculate the effective surface area of Nutter rings, the following
equation is proposed [214]:

(115)

2,5
/

#
1.5

4'A -10%
\ '
Q.8 /A V
y0 • RSR 0.5

0.8 • RSR 0.7
A s • RSR1
• RSR 1.5
*. RSR 2
• RSR 3
0.4
0.4 0.6 0.8 1 1.5 2.S

Fig. 30. Comparison between experimental (exp) and calculated (cal) values of the ratio a/a for
the investigated metal RSR.