# Exp-2-17098128.docx - PROCESS INSTRUMENTATION CONTROL...

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PROCESS INSTRUMENTATION & CONTROL 302265 Experiment 2 Essentials of Process Control Flow Rate Control Process Name: Calvin Tse-Liang Chin Student ID: 17098128 Date: 12/09/2016 Group: 43

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Calvin Tse-Liang Chin 17098128 Table of contents: 1.0 Objectives 2 1.1 Experiment 1 2 1.2 Experiment 2 2 2.0 Background and Equipment 2 3.0 Equations 2 4.0 The PID Controller 2 5.0 Experimental Procedure 3 5.1 Experiment 1: On/Off Control of Flow Control (Closed loop) 3 5.2 Experiment 2: Proportional Control of Flow Control (Closed loop, P only and P + I) 4 6.0 Discussion 6.1 Introduction 5 6.2 On/Off Controller 6.2.1 On/Off Method of Control Graphs 5 6.2.2 Analysis of the On/Off Method of Control 5 6.3 P Only Controller 6.3.1 P Only Method of Control Graph 6 6.3.2 Analysis of the P Only Method of Control 6 6.4 P and I Controller 6.4.1 P and I Method of Control Graph 7 6.4.2 Analysis of the P and I Method of Control 7 1
Calvin Tse-Liang Chin 17098128 6.0 Conclusion 8 1.0 Objectives 1.1 Experiment 1: To demonstrate the effectiveness of an on/off method of varying and controlling pump flow rate. 1.2 Experiment 2: To demonstrate the effectiveness of a P only controller and a P+I controller to vary and control pump flow rate. 2.0 Background and Equipment PCT51 Flow Control Process is a process unit which provides an insight into the fundamentals of process engineering.it consists of a sump tank, loop assembly and an electrical connection box. In this laboratory we had to carry out 3 exercises to demonstrate flow control by varying pump speed. These involved operating an on/off controller, a proportional (P only) controller and a Proportional and integral (P+I) controller. Disturbances can be added as external variables, not controlled in any way y the operator or the system, that impact the process. The main objective of a feedback controller is to respond to changes in the system, which are usually either set point tracking or disturbance mitigation. The controller attempts to force the process variable back towards the desired set point when a disturbance or other load on the process causes a deviation.

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