Automated Continuous Process Control Part 2 potx

... tune the controller, the process characteristics must first be obtained. What we do is to adapt the controller to the process. 12 PROCESS CHARACTERISTICS Steam Process SP Fluid T TT 22 TC 22 Condensate return T(t) T ... t () () + () = () SELF-REGULATING PROCESSES 23 hft 1 , hft 2 , fgp m i , f, gpm Figure 2- 3.7 Horizontal tank with dished ends. c 02. qxd 7/3 /20 03 8 :20 P...

Ngày tải lên: 06/08/2014, 02:20

... Programs / 20 8 Process 1: NH 3 Scrubber / 20 8 Process 2: Catalyst Regenerator / 21 1 Process 3: Mixing Process / 21 3 INDEX 21 5 x CONTENTS preflims.qxd 7/3 /20 03 8:30 PM Page x AUTOMATED CONTINUOUS PROCESS ... Single-Capacitance Processes / 14 2- 3 .2 Multicapacitance Processes / 24 2- 4 Transmitters and Other Accessories / 28 2- 5 Obtaining Process Characteris...

Ngày tải lên: 06/08/2014, 02:20

... 100 75 100 50 50 25 25 0 0 20 0% PB 100% PB 50% PB 25 % PB % controlled variable % controller output Controller output 0% 50% 100% PB = 100% 100°C 20 0°C 300°C PB = 50% 150°C 20 0°C250°C PB = 25 % 175°C 20 0°C 225 °C PB ... direction. Os Is e s s () () = + - 12 675 1 425 . . . Os Is s s s () () = + () + () + () 12 313141 . 32 PROCESS CHARACTERISTICS Figure 2- 5 .2 Res...

Ngày tải lên: 06/08/2014, 02:20

... use Table 4 -2. 2. t 02 1 2 008 - ≥ t . tt 00 21 £ t t 0 0 2 1 10£ . 0 02 038 2 1 ££ t t 0 02 038 2 1 ££ t t ttt t ID o t 11 1 1 2 2 == - , tt I 1 1 = K K K t C o 1 1 125 2 11 107 2 1 01 = Ê Ë ˆ ¯ Ê Ë ˆ ¯ Ê Ë ˆ ¯ - . ... PID Range: Range: t 02 1 2 008 - ≥ t . tt 00 21 £ t t 0 0 2 1 10£ . 0 02 035 2 1 ££ t t 0 02 065 2 1 ££ t t ttt t ID o t 11 1...

Ngày tải lên: 06/08/2014, 02:20

... 7/3 /20 03 8 :28 PM Page 75 RATIO CONTROL 85 FC 23 FC 24 PC 22 FT 24 FT 23 PT 22 Stack Steam Fuel Air FC FO F F set F F P F A SP FY 24 x F F A F F A set (a) F F F A FC 23 FC 24 PC 22 FT 24 FT 23 PT 22 Stack Steam Fuel Air FC FO FY 24 F F set F F set F F F F P F A SP x (b) ... control. F F F A AC 25 AT 25 FC 23 FC 24 FT 24 FT 23 Fuel Air FC FO FY 2...

Ngày tải lên: 06/08/2014, 02:20

... valve in source 1 15 FA2SP = FA-FA1SP ; calculates SP for A source 2 (SUM73) 16 VPA2 = PID(FA2,FA2SP,0 ,20 0) ; FC78 17 AOUT(3,VPA2) ; outputs signal to valve in source 2 Lines 1 through 17 is ... %FB SUM 73 LS 74 TOT 71 SUM 72 FY 75 + - 0 20 0 gpm 0 20 0 gpm 0–100 gpm FB FA2 FA1 FA1TOT FA1LEFT FA1SP FA Ratio Figure 5-5.17 Control scheme for Example 5-5 .2. c05.qxd 7/3 /20 03 8 :28 P...

Ngày tải lên: 06/08/2014, 02:20

... is, 127 G ᭤ ᭤ I O transfer function how much the input affects the output (K) how fast the input affects the output (t, t o ) ᭤ ᭤ c06.qxd 7/3 /20 03 8 :27 PM Page 127 Automated Continuous Process Control. ... Compressor for Problem 5-15. c05.qxd 7/3 /20 03 8 :28 PM Page 122 (c) Design a control scheme to control the dissolved O 2 in the water leaving the scrubber. Most of the...

Ngày tải lên: 06/08/2014, 02:20

... sec CO TO and 900 420 43 1 0 8 0 32 4 sss Ke C s ++++ () = - . CONTROL LOOP STABILITY 139 Steam Process SP fluid T TC 22 Condensate return Tt i () Tt( ) TT 22 TT 22 original location Figure 6 -2. 2 Heat exchanger ... they affect the controlled variable. Specifically, feedforward calls for measuring the 1 42 c07.qxd 7/3 /20 03 8 :26 PM Page 1 42 Automated Continuous Process...

Ngày tải lên: 06/08/2014, 02:20

... H D DD 2 22 100 05 20 0== % . %TO mf TO mf G e s D s 2 63 87 25 1 085 = + - . . ; . %TO mf FFC 2 2 2 =- G HG D DM G M gpm f 2 m FB G C e % c set %TO + c - H D FFC m FF %TO D D % TO G D x 2 mf D 2 %TO D 2 H D 2 FFC 2 %CO %CO m FF ... gain: (7 -2. 4) Substituting Eqs. (7 -2. 2), (7 -2. 3), and (7 -2. 4) into (7 -2. 1) yields (7 -2. 5) We next explain in detail each t...

Ngày tải lên: 06/08/2014, 02:20

... m 21 21 21 12 21 12 21 11 22 == - K K KK KK KK / m 12 12 12 12 21 12 21 11 22 == - K K KK KK KK / m 11 11 11 11 22 11 22 12 21 == - K K KK KK KK / K c m KK KK K c 11 1 1 11 22 12 21 22 2 / == -D D ... process yields PAIRING CONTROLLED AND MANIPULATED VARIABLES 189 m 1 m 2 c 1 c 1 KK KK KK 11 22 11 22 12 21 - KK KK KK 12 21 12 21 11 22 1 - KK KK...

Ngày tải lên: 06/08/2014, 02:20