18-13
18.6
18-14
FIC
18-15
19.7
18.7
18-16
TIC
LIC
18.8
18-17
18-18
1
8.9
18-19
1
8.
1
0
18-21
18.11 As per B.5, C-601 is an electrically driven centrifugal compressor. Its discharge pressure can be controlled
by manipulating its rpm. This is a feedback control. The rpm of an AC motor can be regulated by using
18.12 a) The control scheme is shown below:
b) The control scheme is shown below. For the temperature control, split- range strategy (Split-Range
Strategy 3 in the book) is considered. Tuning of the temperature controller will be very challenging as the
18-23
18.13 The modified ladder diagram is shown below:
18-24
18.14 The modified ladder diagram is shown below. Note that once the pump is started by the high level switch, it