WSC 2005

WSC 2005 Final Abstracts

Simulation Case Studies B Track

Monday 3:30:00 PM 5:00:00 PM
Semiconductor and Petroleum Applications

Chair: Marlize Meyer (Sasol)

Implantation of Gasoline Stream Simulation Model in Petrobras Refinery: Problems, Possibilities and Results
Guilherme Aquino Barbosa, Marcelo Oliveira Souza, Ana Chan, Guilherme Julio Barbosa, Eliahu Rosenbaum, Claudio Duarte Limoeiro, Mario Jorge Lima, and Claudio Rodrigo Beal (Petrobras)

The use of simulation models within PETROBRAS is becoming an important tool for supporting strategic decision. Company’s refineries have great potential for financial gains that may be achieved through product stock reduction, certification time improvement, and other measures. This article deals specifically with the application of a simulation model for assessing a PETROBRAS refinery storage facility to evaluate modernization investments, load increase, and feasibility of new undertakings, taking into account parameters such as service level, tanks occupation, and logistics costs, among others, and considering different scenarios. Along this study, consequential gains were achieved, such as: process improvement, standardization of procedures, and eradication of bottlenecks.

300mm Time Constrained Queue Loop Management
Erik Hertzler and David Van Sickle (Intel Corporation)

In semiconductor processing there are some portions of the processing line where the time between a wafer leaving an operation and being processed at some subsequent operation must be managed or else process defects may occur that can negatively impact the resulting wafer. These time constrained process loops are commonly referred to as "Queue Loops" because wafers are held in queue until there is high confidence the wafers can be processed through the loop within the predetermined process timeframe. The problem in building this confidence resides in being able to synchronize production capacity within each loop while being careful to balance between factory favorable cycle-time and cost effective toolset capacity. A simulation modeling methodology was developed to identify the trade-offs between time through a loop measured in cycle-time and synchronized toolset capacity.

Discrete Event Simulation In Sasol (Petrochemical Industry)
Marlize Meyer (Sasol)

Discrete event simulation, and in this case ArenaŽ, is a tool not traditionally used in continuous environments for design purposes. At Sasol, a petrochemical company, ArenaŽ is used in a continuous environment during design of modifications to existing plants and for the identification of infrastructure constraints in fuel blending scenarios. In these areas the value of ArenaŽ is to evaluate the required changes in the integrated environment dynamically. Interactions between plants can be considered and the influence of integrated operation on planned throughput can be cal-culated. The impact of failures and scheduled maintenance in the plant modifications can be estimated and any ad-justment to infrastructure or plant capacity can be made before money is invested. This presentation discusses examples where ArenaŽ is used in fuel blending and where ArenaŽ is used to calculate plant throughput given historic variation, plant availability and interactions between several plants.