Using linear programing technique to calculate margin loss during unit shutdown in refineries
Abstract
Shutdown of a unit in the event of an accident is a common occurrence in the operation of any refinery in the world and normally causes a certain amount of damage or loss in margin aspects (depending on technology configuration, shutdown unit, downtime and decisions made during the incident). Calculation of margin loss and seeking the optimal solution to minimise its influences are, therefore, very important. This paper presents the method of productivity loss calculation and proposes the optimal operation plans in some shutdown scenarios for a typical refinery based on the application of Linear Programming Technique (LP) developed by Petrovietnam Research and Development Centre for Petroleum Processing (PVPro) - Vietnam Petroleum Institute (VPI).
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