1 |
feed ratio, B composition constant (Stream 4) |
Step |
2 |
B composition, ratio constant (Stream 4) |
Step |
3 |
D feed temperature (Stream 2) |
Step |
4 |
Reactor cooling water inlet temperature |
Step |
5 |
Condenser cooling water inlet temperature |
Step |
6 |
A feed loss (Stream 1) |
Step |
7 |
C header pressure loss-reduced availablity (Stream 4) |
Step |
8 |
A, B, C feed composition (Stream 4) |
Random variation |
9 |
D feed temperature (Stream 2) |
Random variation |
10 |
C feed temperature (Stream 4) |
Random variation |
11 |
Reactor cooling water inlet temperature |
Random variation |
12 |
Condenser cooling water inlet temperature |
Random variation |
13 |
Reaction kinetics |
Slow drift |
14 |
Reactor cooling water valve |
Sticking |
15 |
Condenser cooling water valve |
Sticking |
16 |
Unknown |
Unknown |
17 |
Unknown |
Unknown |
18 |
Unknown |
Unknown |
19 |
Unknown |
Unknown |
20 |
Unknown |
Unknown |