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Simulation Study for a UV Water Disinfection Unit Powered by a Photovoltaic System
Riahi, Said,Mami, Abdelkader,Minzu, Viorel International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.1
This work presents a simulation model for a specific UV disinfection system (UVDS) powered by a Photovoltaic System. The global UVDS also includes the electronic converters, Electronic Ballast, UV Lamp and Motor Pump. The equations that model the physical components' behaviour are connected to obtain a dynamic global model. The latter is converted in a Simulink/Matlab model, which allows to carry out simulation series concerning the entire UVDS. The physical parameters: the irradiation G and the temperature T, are considered as inputs. series of measurements carried out in order to show how these parameters affect the current, the voltage of the PVs and especially the value of the current of the UV lamp, on the other hand a study on the behavior and the evolution of the parameters of the motor pump such as the armature current, motor torque, speed of rotation and the water flow. The purpose of all this is to realize how important are the two parameters concerning the lamp current and the water flow because they are two very important factors to keep an adequate water quality.
Emna Aridhi,Mehdi Abbes,Abdelkader Mami 대한설비공학회 2017 International Journal Of Air-Conditioning and Refr Vol.25 No.4
This paper aims to prove the efficiency of using the naturally free and abundant cold airflow to improve the cooling inside a household refrigerator and to reduce the energy consumption in Nordic and high altitude countries. The cold airflow is spread out in a cavity covering the side wall of the appliance. This cavity is also connected to the cold outdoor environment through inlet and outlet ducts. For that purpose, a pseudo bond graph (BG) model is proposed to model this installation. It represents the thermal transfers by forced convection in the cavity and the ducts with the ambient and outdoor surroundings. The internal air temperature is computed according to the evaporator temperature and the outside cold airflow that is also computed according to the outside temperature. The simulation results show that the cooling process was speeded up by about 39% and the duration of the compressor functioning was reduced by about 10h and 8min, which allows reducing the total energy use by 0.88kWh, and thus achieving an energy saving of about 34.61%. Experimental data of the outside airflow temperature in Canada during 28 hours in January 2017 are used in the model and allow an energy saving of about 40%.
Emna Aridhi,Afef Albouchi,Abdelkader Mami 대한설비공학회 2017 International Journal Of Air-Conditioning and Refr Vol.25 No.1
The present paper studies the properties of observability and controllability using Bond Graph (BG) approach. It is especially applied to a pseudo BG model that describes the thermal transfers in a household refrigerator compartment exposed to an outdoor natural cold airflow. This latter is spread out in an installation, which consists of a cavity covering the side wall of the appliance and connected to inlet and outlet ducts through two openings. The study results show that the pseudo BG model is observable and controllable in time-varying (TV) systems using the concept of duality.
Taghouti, Hichem,Jmal, Sabri,Mami, Abdelkader The Korean Institute of Electrical Engineers 2016 Journal of Electrical Engineering & Technology Vol.11 No.4
In this paper, we propose to analyze the physical characteristics of a planar dual-composite right-left handed transmission line by a common application of Bond Graph approach and Scattering formalism (Methodology S.BG). The technique, we propose consists, on the one hand, of modeling of a dual composite right-left metamaterial transmission line (D-CRLH-TL) by Bond Graph approach, and, it consists of extracting the equivalent circuit of this studied structure. On the other hand, it consists to exploiting the scattering parameters (Scattering matrix) of the DCRLH-TL using the methodology which we previously developed since 2009. Finally, the validation of the proposed and used technique is carried out by comparisons between the simulations results with ADS and Maple (or MatLab).
Microwave Network Study by Bond Graph Approach. Application to Tow-Port Network Filter
Jmal, Sabri,Taghouti, Hichem,Mami, Abdelkader International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.1
There are much processing techniques of microwave circuits, whose dimensions are small compared to the wavelength, but the disadvantage is that they cannot be directly applied to circuits working at high and/or low frequencies. In this article, we will consider the bond graph approach as a tool for analyzing and understanding the behavior of microwave circuits, and to show how basic circuit and network concepts can be extended to handle many microwaves analysis and design problems of practical interest. This behavior revealed in the scattering matrix filter, and which will be operated from its reduced bond graph model. So, we propose in this paper, a new application of bond graph approach jointly with the scattering bond graph for a high frequency study.
Hichem Taghouti,Sabri Jmal,Abdelkader Mami 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.4
In this paper, we propose to analyze the physical characteristics of a planar dualcomposite right-left handed transmission line by a common application of Bond Graph approach and Scattering formalism (Methodology S.BG). The technique, we propose consists, on the one hand, of modeling of a dual composite right-left metamaterial transmission line (D-CRLH-TL) by Bond Graph approach, and, it consists of extracting the equivalent circuit of this studied structure. On the other hand, it consists to exploiting the scattering parameters (Scattering matrix) of the DCRLH-TL using the methodology which we previously developed since 2009. Finally, the validation of the proposed and used technique is carried out by comparisons between the simulations results with ADS and Maple (or MatLab).
Emna Aridhi,Mehdi Abbes,Abdelkader Mami 대한설비공학회 2016 International Journal of Air-Conditioning and Refr Vol.24 No.2
This paper proposes a pseudo bond graph model of thermal transfers by natural convection inside a household refrigerator. It has two inputs: the ambient temperature and the temperature at the level of the evaporator wall. The latter assesses the functioning of the compressor cycles. A performance comparison, with the experimental data, was carried out in order to verify the model, in which, real measurements are used to modulate the evaporator temperature source. The simulation results show the effectiveness of the proposed approach.
Abderrahmene Sellami,Emna Aridhi,Dhia Mzoughi,Abdelkader Mami 대한설비공학회 2018 International Journal Of Air-Conditioning and Refr Vol.26 No.3
In this paper, a robust fault diagnosis for a refrigerator compartment containing a quantity of ice using the bond graph (BG) approach is performed by linear fractional transformations (LFTs). The BG model describes heat transfers supported by the amount of ice placed in the refrigerator compartment, as well as a water container. The LFT modeling of BG elements offers advantages from the point of view of structural analysis and data processing implementation. We have introduced four faults, which consist of ice temperature rise, water leakage, insulation failure at the hot walls of the refrigerator and an increase of the internal temperature due to poor door sealing. The faults are in the form of additional heat fluxes. The simulation results show the effectiveness of the proposed method for detecting and localizing faults. In addition, the lack of door sealing has the most influence on the temperatures in the internal cooling space, water, and ice compared to the other faults.
Thermal Modeling of Solar Dryer — Numerical Simulation, Analysis and Performance Evaluation
Hatem Oueslati,Salah Ben Mabrouk,Abdelkader Mami 대한설비공학회 2018 International Journal Of Air-Conditioning and Refr Vol.26 No.4
This work aims to establish a mathematical model for studying, describing and evaluating the thermal performance of a solar drying device. Therefore, in order to be able to test the theory by numerical simulation, it is necessary to have a model of the device and values of the realistic parameters. A model based on bond graphs methodology is developed to represent the critical energetic relations; thermal analysis of the solar dryer was investigated based on thermal balance equations to predict its performance and the mass transfer phenomena are mostly analyzed through the study of the drying kinetics. Comparison of the results with experimental data suggests the model is reasonable for sizing such a solar dryer.
Hichem OTHMANI,Dhafer MEZGHANI,Ahmed BELAID,Abdelkader MAMI 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.7
Tracking the maximum power point is an appropriate solution against climatic changes like the irradiance and temperature. The classic incremental conductance algorithm is one of the most widely used methods in commercial photovoltaic MPPT’s (Maximum Power Point Tracking). A wide variation of climatic condition can degrade the produced energy. In this work we present our new approach based on fuzzy logic which can guarantee better performance. The studied system used to prove the efficiency of the proposed method is composed by a photovoltaic panel Kaneka K60 connected to a Sepic Converter which fed a resistive load. The All results quoted in this work are found using MATLAB-Simulink. We put the system in different working condition to highlight our new approach. All presented results are discussed.