PROCESS CONTROL PRACTICES (CPE 622) FIC 31
Short Description
PROCESS CONTROL PRACTICES (CPE 622) REPORT sir abby...
Description
PROCESS CONTROL PRACTICES, PROJECT 1
TABLE OF CONTENTS
1.0 ABS ABSTR TRACT ACT...................... ................................................2 ..........................2 2.0 METHODOLOGY........................................3 3.0 RESULT AND CALCULATION......................5 4.0 DISCUSSIO DISCUSSION.................... N...........................................11 .......................11 5.0 CONCLUSION..........................................15
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PROCESS CONTROL PRACTICES, PROJECT 1
1.0 ABSTRACT The objective of this report is to know the details about the process control simulation that use in industry nowadays. Besides that, one of the major objective in this report is to apply knowledge that have learns. The method to get the exact value of optimum optimum tuning also studied. In this report, report, various various method of tuning is being practice in order to get exact value for optimum tuning. Every changing of value was recorded in order to get optimum value of tuning. In search for the optimum ,I ,I and ! values ,several techni"ues are used by using reformulated tangent method. #or this report, to get the value for response rate $%%&, dead time $Td& and time con stant $Tc& $Tc& was calculated by using reformulated tangent method.
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PROCESS CONTROL PRACTICES, PROJECT 1
2.0 METHODOLOGY
Flo E!"#$%&'( FIC 31 Open Loop Test
'. The process process was was let to to stabili(e stabili(e either either manually manually or automati automatically cally.. ). The cont control roller ler was set to manual manual mode. mode. *. The manipulated manipulated variable variable $+& $+& value of the the controller controller was initially initially set set to *- and the set point point was set to /.0m*1h. 2. The proces processs was was let let to to stabil stabili(e i(e.. -. The + + value value of the control controller ler was increased increased by 2. 3. The process process variable variable was let let to response response for for about - 4 '/ seconds seconds to to let it become become stable. stable. 5. The + value value of the control controller ler was decreased decreased back by the the value of the the increment increment in step step -. 0. 6tep - to 5 was repeate repeated d by using using + value value increment increment of 0 and and '). 7. The graph graph obta obtained ined was printe printed d out. out. '/. 8alcul 8alculati ation on was made by referr referring ing to the printed printed graph in order order to obtain obtain the respons responsee rate rate $%%&, dead time $Td& and time constant $Tc& for each value of +. ''. Tuning Tuning rules9 rules9 a. : cont control rol mode mode of I! I! was was used used for flow flow cont control rol.. b. The proportional band $B&, controller gain $; 8& and integral time $I& was calculated using 8ohen '35 %%Td %%Td
I > Td
'35 $**./)&$/./)& > ''/.)7
; 8 >
> /./) min
> /.7/5 > /.7'
CLOSED LOOP TEST
6ET ?I@T TE6T $6&
A?:! !I6T%B:@8E6 TE6T
B$&>''/.)7
B$&>''/.)7
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PROCESS CONTROL PRACTICES, PROJECT 1
;c > /.7'
;c > /.7'
Result B: FIC31 OPEN LOOP TEST
!ata, =+ > 0, Ѳ > 52/
a>
>
b>
Response Rate,RR
Page
>
PROCESS CONTROL PRACTICES, PROJECT 1
%%>
.
>
.
6.0 mm
> 20.*) 1min
1 min
Dead Time,Td
Td$time& > Td$length& x b
'./ mm x
> /./'- min Time Constant,Tc
Tc$time& > Tc$length& x b
)./ mm x
> /./* min Table Table 3b) Tuning Rules by Cien Ci en , !rones " Res#ic$ %C!R)
B$& > '35 %%Td %%Td
I > Td
'35 $20.*)&$/./'-& > ')'./2
> /./'- min
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PROCESS CONTROL PRACTICES, PROJECT 1
; 8 >
> /./0)3 > /.0*
CLOSED LOOP TEST
SET PO&NT TEST %SP)
LO'D D&ST(R'NCES TEST
B$&>')'./2
B$&>')'./2
;c > /.0*
;c > /.0*
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PROCESS CONTROL PRACTICES, PROJECT 1
Result C: FIC31 OPEN LOOP TEST
!ata, =+ > '), Ѳ > 0//
a>
>
b>
>
Response Rate,RR
%%>
.
>
.
6.0 mm 1 min
Dead Time,Td
Td$time& > Td$length& x b
'./ mm x
> /./'- min Time Constant,Tc Page 10
> -).*0 1min
PROCESS CONTROL PRACTICES, PROJECT 1 Tc$time& > Tc$length& x b
)./ mm x
> /./* min Table Table 3b) Tuning Rules by Cien Ci en , !rones " Res#ic$ %C!R)
B$& > '35 %%Td %%Td
I > Td
'35 $-).*0&$/./'-& > '*'.)'
; 8 >
> /./'- min
> /./53
CLOSED LOOP TEST
SET PO&NT TEST %SP)
LO'D D&ST(R'NCES TEST
B$&>'*'.)'
B$&>'*'.)'
;c > /.53
;c > /.53
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PROCESS CONTROL PRACTICES, PROJECT 1
Overall Result Open Loop Test Test S et
∆MV ,%
RR,mn !1
T" ,mn
T#,mn
$B %
I,mn
#
A
4
33.02
0.02
0.045
110.29
0.02
0.91
B
8
48.32
0.015
0.03
121.04
0.015
0.83
C
12
52.38
0.015
0.03
131.21
0.015
0.76
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PROCESS CONTROL PRACTICES, PROJECT 1
Overall Result Close" Loop Test Set
A
$&RFORMA'C& T&ST (STAT)S*
PB % 110.29
I,min 0.02
K% 0.91
SP TEST
LOAD DISTURBANE TEST
O!"#$m&"$ 'i() *m++
Un$"#$m&"$ 'i() *m++ *-i++(in
*-i++(in ')"n in
')"n in -n(in//*+
-n(in//*+
B C
121.04 0.02 131.21 0.02
0.83 0.76
O!"#$m&"$
Un$"#$m&"$ 'i() *m++ *-i++(in
O!"#$m&"$
')"n in -n(in//*+ Un$"#$m&"$ 'i() *m++ *-i++(in ')"n in -n(in//*+
4.0 DISCUSSION
This project was title Ccontrollability of flow control using various tuning ruleD.The flow was control by using #I8 *' e"uipment. The aim of the study to compare the value of flow control calculation by using different value of + $manipulated variable& such as 2, 0, and '). :n open loop test has been performed to the temperature control loop by making the + changes for all three processes at 2 , 0 and ') . The purpose of the open loop test is to obtain the
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PROCESS CONTROL PRACTICES, PROJECT 1 response rate %% and dead time Td. These both value is used to calculate the optimum I! value that has been used in the closed loop test. 6et point change test or closed loop test was conducted in order to study the effect of different response rate obtained from open loop test. These test was used the table *b&Tuning %ules by 8hien, Frones and %eswick $8F%&. #irstly from the experiment #I8 *',we have done an open loop test which we set the value of + at *- .Then we increase the value of + by 2 from the initial initial values and then we decreased back the value to original value after a few seconds. Then from the graph obtained, we calculate the response rate $%%& , dead time $Td& and time constant $Tc& by using the tangent method. #rom the calculation by using tangent method , the %% value was **./) min
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