Page 184 - Fundamentals of Enhanced Oil and Gas Recovery

172 Forough Ameli et al.

4. Calc. T ci
!
r to U to r hd
T ci 5 T h 1 ln ð T s 2 T h Þ
k hcem r co
ð0:146Þð4:05Þ 0:5
5 395 1 ln ð 600 2 395Þ
0:2 0:4
5 530℉

5. a. Estimate h r
21

F tci 5 1 1 r ti 1 21
ε to r ci ε ci
21

5 1 1 0:146 1 21
0:9 0:355 0:9
5 0:865

T to 5 (600 1 460) 5 1060 R
T c i 5 (530 1 46) 5 990 R

2 2

h r 5 σF tci T to 1 T ci ð T to 1 T ci Þ
29 2 2
5 1:713 3 10 ð 0:865Þ 1060 1 990 ð 1060 1 990Þ
!
Btu
5 6:39
2
hr ft ℉
b. Estimate h nc
T to 1 T ci 600 1 530
T a 5 5
2 2

5 565 F
The air properties in this temperature:
3

ρ an 5 0.0388 lb m /ft , μ an 5 0.069 lb m /ft h, C an 5 0.245 Btu/lb m F,

k ha 5 0.0255 Btu/h ft F

21
β 5 @ρ an for ideal gas β
ρ @T
an P
1 1
5 5
T an 565 1 460
5 9:75 3 10 24 R 21