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The Use of Stimulation in Process Plant Design and Evaluation Disclosure Number: IPCOM000221720D
Publication Date: 2012-Sep-15

Publishing Venue

The Prior Art Database

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General Engin=.ering Deparb!:ent, Pullmac, Kellogg Limited, London


Simulation of Plant Operations is fast gaining importance as a major technique for the design and performance evalu&tion of Process Plants. The basic principles of Simulation are being applied in diverse areas of Plant Operations.

In the recent past, computer simulation has 6een used in a number of different areas in Pullman Kellogg Limited. These include

(a) Normal and Emergency Operation Of a Propane Compressor

(b) ~uel and air supply control system to auxiliary boilers

(c) Refinery blending and offtake operations.

Brief reviews of the problems involved, the models ~veloIDed, and the contributions of simulation to achieving effective solutions, are presented.

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The early application of Simulation in the Chemical Engineering Industry was in the area of Process ~sign. Various Process Simulators were developed .which allowed the process engineer to examine alternative schemes and evaluate Process conditions under varying operating conditions. The speed and flexibility offered by the simulators made a significant contribution to the development of cost-effective andcompetitive process schemes.

One of the penalties paid for such development was the increasing level of sophistication demanded in the area of plant control.

The search for larger product throughput and greater ener~, ~covery usually resulted in the subjection of equipment to more severe operating conditions. Capital expenditure on equipment could be contained by designing within finer tolerances; however this required th; development of complex control schemes to ensure equipment opera- ~;ion within closely defined lir, lits: Such control was made feasible

by the remarkable advances intransducertechnology and real-time ¢omputers.,and plant control by digital computers becam~ a reality.

Ihe pro~essing capabilities offered by these machines in addition to their monitoring and control functions was exploited and became

~he next gr~,vth area for the application of simulation techniques.

li~'ever it became increasingly clear that major cost adv~tages cou>d be obtained by applying the principles of simulation in the design office downstream of process design. The availability of simulation languages that facilitated the building of models of continuous, ~r mixed processes allowed the development of schemes to perform
studies that would otherwise vould be in;possible or prohibitively : "

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expensive. Such studies could be orientated towards establishing parameters for safe and efficient plant operation or opti;~;isC~g configuration for minimum cai;ital invest[ent consiste~.t ~.,ith produc- tion targets. ~he first two of the following revie'.,:s are concerned with the for~rer objective, tlre third ~,~ith the latter.


2.1 The Problem

A propane refrigeration system is u...