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Appl. Sci. 2017, 7(6), 564; doi:10.3390/app7060564

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
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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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Abstract

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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