Crude oil distillation is important in refining industry. Operating variables of distillation process have a critical effect on product output value and energy consumption. However, the objectives of minimum energy co...Crude oil distillation is important in refining industry. Operating variables of distillation process have a critical effect on product output value and energy consumption. However, the objectives of minimum energy consumption and maximum product output value do not coordinate with each other and do not lead to the maximum economic benefit of a refinery. In this paper, a systematic optimization approach is proposed for the maximum annual economic benefit of an existing crude oil distillation system, considering product output value and energy consumption simultaneously. A shortcut model in Aspen Plus is used to describe the crude oil distillation and the pinch analysis is adopted to identify the target of energy recovery. The optimization is a nonlinear programming problem and solved by stochastic algorithm of particle warm optimization.展开更多
This paper considers an on-off fluid queue model.The on and off states of the system appear alternately,and the sojourn times at these two different states are independent,and each one follows an exponential distribut...This paper considers an on-off fluid queue model.The on and off states of the system appear alternately,and the sojourn times at these two different states are independent,and each one follows an exponential distribution.The fluid flows into the system buffer with some strategies to wait for the system service under the first-come first-served discipline.Here the system can process the fluid in the buffer only when the system is on state.With given utility functions such as an expected average social profit,and an individual expected profit,the equilibrium strategies are characterized under both the fully unobservable case and the partially observable case.展开更多
基金Supported by the National Natural Science Foundation of China(21176178)the State Key Laboratory of Chemical Engineering(SKL-Ch E-13B02)
文摘Crude oil distillation is important in refining industry. Operating variables of distillation process have a critical effect on product output value and energy consumption. However, the objectives of minimum energy consumption and maximum product output value do not coordinate with each other and do not lead to the maximum economic benefit of a refinery. In this paper, a systematic optimization approach is proposed for the maximum annual economic benefit of an existing crude oil distillation system, considering product output value and energy consumption simultaneously. A shortcut model in Aspen Plus is used to describe the crude oil distillation and the pinch analysis is adopted to identify the target of energy recovery. The optimization is a nonlinear programming problem and solved by stochastic algorithm of particle warm optimization.
基金supported by National Natural Science Foundation of China(No.62171143)Natural Science Foundation of Hebei Province(No.A2019203313)Key Project of Scientific Research in Higher Education of Hebei Province(Natural Sciences Class)(No.ZD2019079),China。
文摘This paper considers an on-off fluid queue model.The on and off states of the system appear alternately,and the sojourn times at these two different states are independent,and each one follows an exponential distribution.The fluid flows into the system buffer with some strategies to wait for the system service under the first-come first-served discipline.Here the system can process the fluid in the buffer only when the system is on state.With given utility functions such as an expected average social profit,and an individual expected profit,the equilibrium strategies are characterized under both the fully unobservable case and the partially observable case.
