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Appl. Sci. 2017, 7(6), 564;

Scheduling of Crude Oil Operations in Refinery without Sufficient Charging Tanks Using Petri Nets

Macau Institute of Systems Engineering, Macau University of Science and Technology, Macau, China
Author to whom correspondence should be addressed.
Academic Editor: Elli Kartsakli
Received: 27 March 2017 / Revised: 15 May 2017 / Accepted: 17 May 2017 / Published: 30 May 2017
(This article belongs to the Special Issue Modeling, Simulation, Operation and Control of Discrete Event Systems)
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A short-term schedule for crude oil operations in a refinery should define and sequence the activities in detail. Each activity involves both discrete-event and continuous variables. The combinatorial nature of the scheduling problem makes it difficult to solve. For such a scheduling problem, charging tanks are a type of critical resources. If the number of charging tanks is not sufficient, the scheduling problem is further complicated. This work conducts a study on the scheduling problem of crude oil operations without sufficient charging tanks. In this case, to make a refinery able to operate, a charging tank has to be in simultaneous charging and feeding to a distiller for some time, called simultaneously-charging-and-feeding (SCF) mode, leading to disturbance to the oil distillation in distillers. A hybrid Petri net model is developed to describe the behavior of the system. Then, a scheduling method is proposed to find a schedule such that the SCF mode is minimally used. It is computationally efficient. An industrial case study is given to demonstrate the obtained results. View Full-Text
Keywords: oil refinery; crude oil operations; Petri net (PN); short-term scheduling oil refinery; crude oil operations; Petri net (PN); short-term scheduling

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An, Y.; Wu, N.; Hon, C.T.; Li, Z. Scheduling of Crude Oil Operations in Refinery without Sufficient Charging Tanks Using Petri Nets. Appl. Sci. 2017, 7, 564.

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