bendib riad | University of 20 Aoùt 1955-Skikda (original) (raw)

Papers by bendib riad

ICCEIS 2022, Jan 16, 2023

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

ICCEIS 2022

The paper considers the effect of feed plate location on the interactions in a seven plate binary... more The paper considers the effect of feed plate location on the interactions in a seven plate binary distillation column. The mathematical model of the distillation column is deduced based on the equations of mass and energy balances for each stage, detailed model for both reboiler and condenser, and heat transfer equations. The Dynamic Relative Magnitude Criterion, DRMC is used to assess the interactions in different feed plate locations for a seven plate (Benzene-Toluene) binary distillation column ( the feed plate is originally at stage 4). The results show that whenever we go far from the optimum feed plate position, the level of interaction augments.

The paper highlight the guidelines to propose an integration frame to optimize the saety of a fir... more The paper highlight the guidelines to propose an integration frame to optimize the saety of a fired heater F100200 located in CDU unit (crude distillation unit) in ADRAR refinery south of Algeria.The proposed frame integrate the HAZOP - hazards and operability studies and safety integrity level studies. The idea behind the proposed method is to overcome the limitations raised from the application of each technique alone. The application of this proposed technique in the fired heater indicate that the heater needs more safeguards to work in a safe manner, as a conclusion more safety instrumented functions should be added, and the safety level of the existing ones should be checked.

2020 International Conference on Electrical Engineering (ICEE), 2020

In this work we present a study based on two methods D-HIGRAPH and HAZOP methods applied for the ... more In this work we present a study based on two methods D-HIGRAPH and HAZOP methods applied for the LPG storage tanks in SKIKDA refinery which is considered as the most important refinery in Algeria. Several recommendations raised from our study to improve the safety of the plant particularly since it is considered as an old plant start working since 1980. The study is completed by simulating the deduced dangerous scenarios which is the explosion of sphere S181 (for butane storage) using ALOHA software. In the following some results for thermal effect of an explosion scenario for S181 sphere

IMPORTANT NOTICE This article is a publication of the Algerian journal of Signals and Systems and... more IMPORTANT NOTICE This article is a publication of the Algerian journal of Signals and Systems and is protected by the copyright agreement signed by the authors prior to its publication. This copy is sent to the author for non-commercial research and education use, including for instruction at the author's institution, sharing with colleagues and providing to institution administration. Other uses, namely reproduction and distribution, selling copies, or posting to personal, institutional or third party websites are not allowed.

Interaction between control loops has long been recognised as an area for concern within the fiel... more Interaction between control loops has long been recognised as an area for concern within the field of process control. The first formalised method for as-sessing the level of interaction present in a system of loops was Bristol's relative gain array. Being based solely on steady state data, construction of the RGA is pleasingly simple and application of the technique has attracted significant researchers. Where strong interaction effects arise as a problem in practice, their elimination can be approached at a progression of levels each carrying a progressively increased cost implication. The decision as to which of these levels of approach is warranted in overcoming any specific case of interaction involves gaining insight into the mechanics of the system itself. In the future, development in the use of detailed dynamic modelling and simulation may lead to the possibilities of evaluating the degree and form of interaction present and of developing compensating strategies. In thi...

Welding in the World, Le Soudage Dans Le Monde

In the paper we propose the design of an implicit decoupling for binary distillation column, DV c... more In the paper we propose the design of an implicit decoupling for binary distillation column, DV control scheme. The idea is to modify the design of the feed plate in such away the liquid holdup is augmented. this is can be done by adding a small tank . after that the interactions betweenthe two loops are measured using the DRMC method. the results show that augmenting the holdup three times will give unity values of DRMC elements which indicate that there is a complete decoupling of the two loops.

in the paper we simulate the effect of augmenting the liquid holdup in the feed plate on interact... more in the paper we simulate the effect of augmenting the liquid holdup in the feed plate on interactions between the loops of different control configurations, for a 7 plate Benzene-Toluene distillation column. The Dynamic Magnitude relative criterion (DRMC) is used to assess the level of interactions between the loops in the other hand the mathematical models for different configurations are deduced based on the consistency relations between the different control schemes and energy balance LV configuration.

In this paper we will consider three simple configurations (the most known ones) (LV, DV and LB) ... more In this paper we will consider three simple configurations (the most known ones) (LV, DV and LB) and we compare them in the basis of interactions and disturbance propagation. The mathematical models for the material balance configurations (DV and LB) are deduced using mathematical transformations (in the paper the general case of transformation between any two configurations is presented), taking the conventional configuration (LV) as a based configuration, the Dynamic Relative Magnitude Criterion (DRMC) is used to assess the interactions and disturbance propagation. The results show that the material balance configurations (DV,LB) are non interactive compared with LV but large disturbances propagate from the bottom to the top in DV and with the same magnitude in LB and LV.

At the design stage, one of the primary points that designers and engineers will take into consid... more At the design stage, one of the primary points that designers and engineers will take into consideration is getting the best control configuration that would result in the least interaction in the system. Recent work in distillation control has largely been concerned with this issue. Emphasis has been put on answering the important question of how to pair manipulated and controlled variables that minimize or eliminate the apparent interaction between the composition control loops. The two pairing strategies that have received the most attention in the literature are conventional control LV and material balance control DV. Other pairings strategies that have been proposed to overcome the inherent limitations of the LV and DV structures are configurations that use ratios of flows as composition manipulators. Big deal of research on distillation column during the last decade has concerned this issue

in this paper we aim to draw attention to the fact that in considering interaction between feedba... more in this paper we aim to draw attention to the fact that in considering interaction between feedback control loops an important distinction should be drawn between cases of true ( two-way) interaction and cases of what can be termed “one-way interaction “ or disturbance propagation “ from one loop to another. A frequency domain approach using magnitude/log frequency plots is presented which allows assessment of the direction and intensity of disturbance propagation present in a system. Some examples of interaction presented previously in the literature are analyzed on this basis and found to exhibit strong disturbance propagation features. In addition some anomalous results from use of the relative gain array are placed in context and related to the effects of using real rather than perfect controllers

The idea is to modify the physical structure of the column by augmenting the liquid hold-up on th... more The idea is to modify the physical structure of the column by augmenting the liquid hold-up on the feed plate. The model of DV structure is deduced from that of the LV structure using consistency relations between the two structures. The dynamic relative magnitude criterion (DRMC) is used to assess the interactions in different cases of liquid hold-up in the feed plate for a seven plate (Benzene-Toluene) binary distillation column (the feed plate is originally at stage N°4). The results show that augmenting the liquid hold-up in the feed plate tends to minimize the interactions between the two loops.

In this paper we will consider the most known ratios control schemes ((L/D, V/B),(L/D,V/F), Ryska... more In this paper we will consider the most known ratios control schemes ((L/D, V/B),(L/D,V/F), Ryskamp's, and (D/(L+D),V/B)) for binary distillation column and we compare them in the basis of interactions and disturbance propagation. The models for these configurations are deuced using mathematical transformations taking the energy balance structure (LV) as a base model. The dynamic relative magnitude criterion (DRMC) is used to assess the interactions. The results show that the introduction of ratios in controlling the column tends to minimize the degree of interactions between the loops.

ICCEIS 2022, Jan 16, 2023

ICCEIS 2022

2020 International Conference on Electrical Engineering (ICEE), 2020

Welding in the World, Le Soudage Dans Le Monde