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Kenzo Fujii - One of the best experts on this subject based on the ideXlab platform.

  • Development of a Nonlinear Soft Sensor Using a GMDH Network for a Refinery Crude Distillation Tower
    Electrical Engineering in Japan, 2014
    Co-Authors: Kenzo Fujii, Toru Yamamoto
    Abstract:

    SUMMARY In Atmospheric Distillation processes, stabilization of processes is required in order to optimize the crude-oil composition that corresponds to product market conditions. However, the process control systems sometimes fall into unstable states in the case where unexpected disturbances are introduced, and these unusual phenomena have had an undesirable effect on certain products. Furthermore, a useful chemical engineering model has not yet been established for these phenomena. This remains a serious problem in Atmospheric Distillation processes. This paper describes a new modeling scheme to predict unusual phenomena in the Atmospheric Distillation process using a GMDH (Group Method of Data Handling) network, which is a type of network model. According to the GMDH network, the model structure can be determined systematically. However, the method of least squares has been commonly utilized in determining weight coefficients (model parameters). Estimation accuracy is not entirely essential, because the sum of the squared errors between the measured values and estimates is evaluated. Therefore, instead of evaluating the sum of the squared errors, the sum of the absolute values of the errors is introduced and the Levenberg–Marquardt method is employed in order to determine the model parameters. The effectiveness of the proposed method is evaluated by foaming prediction in the crude oil switching operation in the Atmospheric Distillation process.

  • multiloop one spot tuning pid control of an Atmospheric Distillation process
    IFAC Proceedings Volumes, 2001
    Co-Authors: Kenzo Fujii, Toru Yamamoto
    Abstract:

    Abstract In petroleum refineries and petrochemical processes, it is important to reduce the production costs in order to increase competitiveness. The author have proposed the one-spot tuning PID control scheme, and applied it to real Atmospheric Distillation tower. The effectiveness of the proposed control scheme has been verified in the steady operation mode. However, the satisfactory performance could not be obtained in the transition operation mode in which crude oil and operation mode were switched. This paper presents a new multiloop one-spot tuning PID control scheme. According to the newly proposed control scheme, the satisfactory control performance can be obtained in both the steady and the transition operation modes.

  • Cyclic one-spot tuning pid control of an Atmospheric Distillation process
    1999 European Control Conference (ECC), 1999
    Co-Authors: Kenzo Fujii, Toru Yamamoto, Masahiro Kaneda
    Abstract:

    Though generally most of chemical processes are complex multivariable systems with strong interactions, PID controllers are used in most cases even nowadays. However, it is well known that the tuning of their parameters is very difficult. On the other hand, though Dynamic Matrix Control(DMC) has become to be often used for such control systems, it required a lot of the cost and the long term for development. In this paper, a new tuning scheme of PID parameters is proposed, which is called a cyclic one-spot tuning scheme. Moreover, the proposed control scheme is evaluated on a real Atmospheric Distillation process refining petroleum.

Masahiro Kaneda - One of the best experts on this subject based on the ideXlab platform.

  • Cyclic one-spot tuning pid control of an Atmospheric Distillation process
    1999 European Control Conference (ECC), 1999
    Co-Authors: Kenzo Fujii, Toru Yamamoto, Masahiro Kaneda
    Abstract:

    Though generally most of chemical processes are complex multivariable systems with strong interactions, PID controllers are used in most cases even nowadays. However, it is well known that the tuning of their parameters is very difficult. On the other hand, though Dynamic Matrix Control(DMC) has become to be often used for such control systems, it required a lot of the cost and the long term for development. In this paper, a new tuning scheme of PID parameters is proposed, which is called a cyclic one-spot tuning scheme. Moreover, the proposed control scheme is evaluated on a real Atmospheric Distillation process refining petroleum.

Toru Yamamoto - One of the best experts on this subject based on the ideXlab platform.

  • Development of a Nonlinear Soft Sensor Using a GMDH Network for a Refinery Crude Distillation Tower
    Electrical Engineering in Japan, 2014
    Co-Authors: Kenzo Fujii, Toru Yamamoto
    Abstract:

    SUMMARY In Atmospheric Distillation processes, stabilization of processes is required in order to optimize the crude-oil composition that corresponds to product market conditions. However, the process control systems sometimes fall into unstable states in the case where unexpected disturbances are introduced, and these unusual phenomena have had an undesirable effect on certain products. Furthermore, a useful chemical engineering model has not yet been established for these phenomena. This remains a serious problem in Atmospheric Distillation processes. This paper describes a new modeling scheme to predict unusual phenomena in the Atmospheric Distillation process using a GMDH (Group Method of Data Handling) network, which is a type of network model. According to the GMDH network, the model structure can be determined systematically. However, the method of least squares has been commonly utilized in determining weight coefficients (model parameters). Estimation accuracy is not entirely essential, because the sum of the squared errors between the measured values and estimates is evaluated. Therefore, instead of evaluating the sum of the squared errors, the sum of the absolute values of the errors is introduced and the Levenberg–Marquardt method is employed in order to determine the model parameters. The effectiveness of the proposed method is evaluated by foaming prediction in the crude oil switching operation in the Atmospheric Distillation process.

  • GMDH-Based Monitoring in an Atmospheric Distillation Process
    2006 SICE-ICASE International Joint Conference, 2006
    Co-Authors: A. Sakaguchi, K. Fujii, Toru Yamamoto
    Abstract:

    In Atmospheric Distillation processes, the stabilization of processes is required in order to optimize the crude-oil composition corresponding to the product market conditions. However, the process control systems have sometimes fallen into unstable states in the case where unexpected disturbances are put into them, and the unusual phenomena have given undesirable influence on products. On the other hand, the useful chemical engineering model has not been established for these phenomena yet. This is still painful problem in the Atmospheric Distillation process now. This paper describes a new modeling scheme to predict the unusual phenomena in the Atmospheric Distillation process using the GMDH (group method of data handling) network which is one of network models. According to the GMDH network, the model structure can be determined systematically. However, the least squares method has been usually utilized in determining weight coefficients (model parameters). Then, the estimation accuracy is not expected so much, because the sum of squared errors between the measured values and estimates is evaluated. Therefore, instead of evaluating the sum of squared errors, the sum of absolute value of errors is introduced and the Levenberg-Marquardt method is employed in order to determine model parameters. The effectiveness of the proposed method is evaluated on the foaming prediction in the crude oil switching operation in the Atmospheric Distillation process

  • multiloop one spot tuning pid control of an Atmospheric Distillation process
    IFAC Proceedings Volumes, 2001
    Co-Authors: Kenzo Fujii, Toru Yamamoto
    Abstract:

    Abstract In petroleum refineries and petrochemical processes, it is important to reduce the production costs in order to increase competitiveness. The author have proposed the one-spot tuning PID control scheme, and applied it to real Atmospheric Distillation tower. The effectiveness of the proposed control scheme has been verified in the steady operation mode. However, the satisfactory performance could not be obtained in the transition operation mode in which crude oil and operation mode were switched. This paper presents a new multiloop one-spot tuning PID control scheme. According to the newly proposed control scheme, the satisfactory control performance can be obtained in both the steady and the transition operation modes.

  • Cyclic one-spot tuning pid control of an Atmospheric Distillation process
    1999 European Control Conference (ECC), 1999
    Co-Authors: Kenzo Fujii, Toru Yamamoto, Masahiro Kaneda
    Abstract:

    Though generally most of chemical processes are complex multivariable systems with strong interactions, PID controllers are used in most cases even nowadays. However, it is well known that the tuning of their parameters is very difficult. On the other hand, though Dynamic Matrix Control(DMC) has become to be often used for such control systems, it required a lot of the cost and the long term for development. In this paper, a new tuning scheme of PID parameters is proposed, which is called a cyclic one-spot tuning scheme. Moreover, the proposed control scheme is evaluated on a real Atmospheric Distillation process refining petroleum.

Longcheng Liu - One of the best experts on this subject based on the ideXlab platform.

  • Energy Saving in Crude Oil Atmospheric Distillation Columns by Modifying the Vapor Feed Inlet Tray
    Chemical Engineering & Technology, 2011
    Co-Authors: Mehdi Arjmand, Luis Moreno, Longcheng Liu
    Abstract:

    Optimization of a typical crude oil Atmospheric Distillation unit and reduction of energy conservation were carried out through modifying the implementation and change in the flash zone of the tower. A conventional procedure in such units involves the combination of liquid and vapor product of the prefractionation train surge drum upon introduction to the tower. However, it is theoretically illustrated and represented by simulation means that introducing the vapor feed into the upper stages of the Distillation column separately can lead to an energy saving of 12.6 % in the condenser duty, an increased liquid-to-gas flow (L/G) at certain points of the column, and hence to a reduction in diameter and investment costs of new tower designs of approximately US$ 0.7 million a–1. The proposal can be put into practice without the need of additional equipments or additional cost of difficult rerouting the streams. An industrial case study of a steady-state crude oil Distillation unit is given by simulation provision of AspenHysys™.

  • Optimization for energy conservation of crude oil Atmospheric Distillation columns by modifying vapour feed inlet tray from pre-fractionation train
    2010
    Co-Authors: Mehdi Arjmand, Luis Moreno, Longcheng Liu
    Abstract:

    Optimization of a typical crude oil Atmospheric Distillation unit and reduction of energy conservation were carried out through modifying the implementation and change in the flash zone of the towe ...

Mehdi Arjmand - One of the best experts on this subject based on the ideXlab platform.

  • Energy conservation in Atmospheric Distillation columns by modifying vapour feed inlet tray
    2014
    Co-Authors: Mehdi Arjmand, K. Motahari
    Abstract:

    A discussion on energy conservation in Atmospheric Distillation columns by modifying vapor feed inlet tray covers the basic equipment required for standard continuous industrial Distillation; proposal to insert the vapor product of the flash drum into upper trays of the column separately; side stream products; investment costs; and case study involving an Atmospheric Distillation of a mixture of benzene and toluene. This is an abstract of a paper presented at the 7th European Congress of Chemical Engineering-7 and 19th International Congress of Chemical and Process Engineering CHISA (Prague, Czech Republic 8/28/2010-9/1/2010).

  • Energy Saving in Crude Oil Atmospheric Distillation Columns by Modifying the Vapor Feed Inlet Tray
    Chemical Engineering & Technology, 2011
    Co-Authors: Mehdi Arjmand, Luis Moreno, Longcheng Liu
    Abstract:

    Optimization of a typical crude oil Atmospheric Distillation unit and reduction of energy conservation were carried out through modifying the implementation and change in the flash zone of the tower. A conventional procedure in such units involves the combination of liquid and vapor product of the prefractionation train surge drum upon introduction to the tower. However, it is theoretically illustrated and represented by simulation means that introducing the vapor feed into the upper stages of the Distillation column separately can lead to an energy saving of 12.6 % in the condenser duty, an increased liquid-to-gas flow (L/G) at certain points of the column, and hence to a reduction in diameter and investment costs of new tower designs of approximately US$ 0.7 million a–1. The proposal can be put into practice without the need of additional equipments or additional cost of difficult rerouting the streams. An industrial case study of a steady-state crude oil Distillation unit is given by simulation provision of AspenHysys™.

  • Optimization for energy conservation of crude oil Atmospheric Distillation columns by modifying vapour feed inlet tray from pre-fractionation train
    2010
    Co-Authors: Mehdi Arjmand, Luis Moreno, Longcheng Liu
    Abstract:

    Optimization of a typical crude oil Atmospheric Distillation unit and reduction of energy conservation were carried out through modifying the implementation and change in the flash zone of the towe ...