Pub Date : 2020-06-01DOI: 10.1109/REDEC49234.2020.9163854
Mohamed Ghazzali, M. Haloua, F. Giri
This paper deals with the problem of voltage and current control of voltage source converters (VSCs) with LC output filter. The objective is to achieve voltage regulation and reference tracking while ensuring current stability and regulation despite the unknown disturbances and to mitigate voltage harmonics. In this work, an enhanced internal model-based control system proposed for voltage and current control and harmonics compensation in three-phase VSCs with LC output filter. The proposed control system has a cascade structure and it is designed in the synchronous reference frame d-q. The outer loop is for voltage control and the inner loop is for current control. A three-degree-of-freedom internal model controller (IMC) is developed for robust voltage regulation and reference tracking despite the unknown disturbances and voltage harmonics elimination. The current controller uses PI controllers for current regulation and feedforward terms to enable the d-q components of voltage and current to be fully decoupled. A comparative simulation study with the conventional PI-based synchronous reference frame VSC control system is conducted to highlight the efficiency of the proposed approach. Unlike conventional control, The IMC based control system provides faster reference tracking with less fluctuating output voltage. The proposed method also provides individual harmonics distortion (IHD) and total harmonics distortion (THD) withing the maximum level defined by the standard IEEE 519-2014.
{"title":"Enhanced Internal Model Control and Harmonics Mitigation in Three-Phase Voltage Source Converters","authors":"Mohamed Ghazzali, M. Haloua, F. Giri","doi":"10.1109/REDEC49234.2020.9163854","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163854","url":null,"abstract":"This paper deals with the problem of voltage and current control of voltage source converters (VSCs) with LC output filter. The objective is to achieve voltage regulation and reference tracking while ensuring current stability and regulation despite the unknown disturbances and to mitigate voltage harmonics. In this work, an enhanced internal model-based control system proposed for voltage and current control and harmonics compensation in three-phase VSCs with LC output filter. The proposed control system has a cascade structure and it is designed in the synchronous reference frame d-q. The outer loop is for voltage control and the inner loop is for current control. A three-degree-of-freedom internal model controller (IMC) is developed for robust voltage regulation and reference tracking despite the unknown disturbances and voltage harmonics elimination. The current controller uses PI controllers for current regulation and feedforward terms to enable the d-q components of voltage and current to be fully decoupled. A comparative simulation study with the conventional PI-based synchronous reference frame VSC control system is conducted to highlight the efficiency of the proposed approach. Unlike conventional control, The IMC based control system provides faster reference tracking with less fluctuating output voltage. The proposed method also provides individual harmonics distortion (IHD) and total harmonics distortion (THD) withing the maximum level defined by the standard IEEE 519-2014.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"72 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126133365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.1109/REDEC49234.2020.9163861
Abdallah Dadi Mahamat, Abakar Ali, J. Tanguier, A. Donnot, R. Benelmir
The work we present is a comparative study based on an experimental approach to the mechanical and thermal properties of different local clay-based building materials with the incorporation of agricultural waste in Chad. These local building materials have been used since ancient times by the low-income population. They were the subject of a detailed characterization of their mechanical and thermal parameters. The objective is to obtain lightweight materials with good thermomechanical performance and which can contribute to improving thermal comfort, energy-saving, and security in social housing in Chad while reducing the cost of investment. Several clay-based samples with increasing incorporation of 0 to 8% of agricultural waste (cow dung or millet pod) were made. We used appropriate experimental methods for porous materials (the hydraulic press for mechanical tests and the box method for thermal tests). In this article, we have highlighted the values and variations of the mechanical compressive resistances, thermal conductivities, and thermal resistances of test pieces made with these materials. Knowing the mechanical and thermal characteristics, we also carried out a thermomechanical study. The thermal data made it possible to make Dynamic Thermal Simulations (STD) of the buildings thanks to the Pléiades + COMFIE software. The results obtained show that the use of these materials in a building presents good mechanical and thermal performance with low consumption of electrical energy for better thermal comfort of the occupants. Thus agricultural waste can be recovered thanks to its integration into building materials based on clay.
{"title":"Mechanical and thermophysical characterization of local clay-based building materials","authors":"Abdallah Dadi Mahamat, Abakar Ali, J. Tanguier, A. Donnot, R. Benelmir","doi":"10.1109/REDEC49234.2020.9163861","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163861","url":null,"abstract":"The work we present is a comparative study based on an experimental approach to the mechanical and thermal properties of different local clay-based building materials with the incorporation of agricultural waste in Chad. These local building materials have been used since ancient times by the low-income population. They were the subject of a detailed characterization of their mechanical and thermal parameters. The objective is to obtain lightweight materials with good thermomechanical performance and which can contribute to improving thermal comfort, energy-saving, and security in social housing in Chad while reducing the cost of investment. Several clay-based samples with increasing incorporation of 0 to 8% of agricultural waste (cow dung or millet pod) were made. We used appropriate experimental methods for porous materials (the hydraulic press for mechanical tests and the box method for thermal tests). In this article, we have highlighted the values and variations of the mechanical compressive resistances, thermal conductivities, and thermal resistances of test pieces made with these materials. Knowing the mechanical and thermal characteristics, we also carried out a thermomechanical study. The thermal data made it possible to make Dynamic Thermal Simulations (STD) of the buildings thanks to the Pléiades + COMFIE software. The results obtained show that the use of these materials in a building presents good mechanical and thermal performance with low consumption of electrical energy for better thermal comfort of the occupants. Thus agricultural waste can be recovered thanks to its integration into building materials based on clay.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124073715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.1109/REDEC49234.2020.9163860
C. El‐Bayeh, Khaled Alzaareer, Mohamed-hamza Laraki, B. Brahmi, K. Panchabikesan, W. A. Venturini, U. Eicker
The originality of this paper consists of analyzing and comparing the installation of and Photovoltaic Dish Stirling (DS) systems in buildings. The main goal is to maximize energy production using only the available building rooftop by introducing different solar technologies. For the case study, a typical building with four floors located in Lebanon is considered. The main goal is to propose a self-sufficient energy building that produces its own energy without the need to be connected to the grid or supplied by other external electricity sources. Three case studies are considered in which different solar technologies are installed on the rooftop: (i) PV system, (ii) Dish Stirling System, (iii) combination of (i), and (ii) to maximize the energy generation and the utilization factor of the rooftop. Results show that the PV system of 9. 3kW can only supply 12% of the total energy demand of the building during a day, while 68% is attained by using one Dish Stirling of a capacity of 25kWp. In the third case, the combination of both systems yields about 73% of the total energy demand of the building.
{"title":"A Comparison between PV and Dish Stirling Systems Towards Self-Sufficient Energy Building in Lebanon","authors":"C. El‐Bayeh, Khaled Alzaareer, Mohamed-hamza Laraki, B. Brahmi, K. Panchabikesan, W. A. Venturini, U. Eicker","doi":"10.1109/REDEC49234.2020.9163860","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163860","url":null,"abstract":"The originality of this paper consists of analyzing and comparing the installation of and Photovoltaic Dish Stirling (DS) systems in buildings. The main goal is to maximize energy production using only the available building rooftop by introducing different solar technologies. For the case study, a typical building with four floors located in Lebanon is considered. The main goal is to propose a self-sufficient energy building that produces its own energy without the need to be connected to the grid or supplied by other external electricity sources. Three case studies are considered in which different solar technologies are installed on the rooftop: (i) PV system, (ii) Dish Stirling System, (iii) combination of (i), and (ii) to maximize the energy generation and the utilization factor of the rooftop. Results show that the PV system of 9. 3kW can only supply 12% of the total energy demand of the building during a day, while 68% is attained by using one Dish Stirling of a capacity of 25kWp. In the third case, the combination of both systems yields about 73% of the total energy demand of the building.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128110761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.1109/REDEC49234.2020.9163900
Mohamed Elamine AIT ALI, M. Agouzoul, A. Aannaque
The objective of this work is to study, using an analytical approach and a numerical simulation, the dynamic behavior of an oscillating liquid inside a fixed U-tube with open ends used as wave energy converter. By establishing a detailed liquid’s motion equation and developing a numerical simulation, based on volume of fluid formulation, we quantified the available power that could be extracted for our configuration. A parametrical study using the analytical model showed the effect of each significant parameter on first peak power and subsequent dampening of this peak power, which constitutes a tool for choosing optimal designs. The numerical simulation gave a more realistic model, the obtained results are in good agreements with those of the analytical approach that underestimates the dampening of oscillations. We focused after on influence of the numerical model formulation, mesh type and mesh size on simulation results: no noticeable effect was observed.
{"title":"Analytical and numerical study of an oscillating liquid inside a U-tube used as wave energy converter","authors":"Mohamed Elamine AIT ALI, M. Agouzoul, A. Aannaque","doi":"10.1109/REDEC49234.2020.9163900","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163900","url":null,"abstract":"The objective of this work is to study, using an analytical approach and a numerical simulation, the dynamic behavior of an oscillating liquid inside a fixed U-tube with open ends used as wave energy converter. By establishing a detailed liquid’s motion equation and developing a numerical simulation, based on volume of fluid formulation, we quantified the available power that could be extracted for our configuration. A parametrical study using the analytical model showed the effect of each significant parameter on first peak power and subsequent dampening of this peak power, which constitutes a tool for choosing optimal designs. The numerical simulation gave a more realistic model, the obtained results are in good agreements with those of the analytical approach that underestimates the dampening of oscillations. We focused after on influence of the numerical model formulation, mesh type and mesh size on simulation results: no noticeable effect was observed.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"102 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113975321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.1109/redec49234.2020.9163896
I. Ibrahim, Y. Hamam, Y. Alayli, T. Jamiru, R. Sadiku
Globally, parabolic trough solar collector installation is in high demand among the various concentrating solar power (CSP) technologies due to the high energy demand. The design involves the bending of a flexible reflective material that concentrates the solar irradiation that lands on the collector surface to the focal line; this is where the absorber pipe is positioned. This paper presents a modified parabolic trough solar collector with the aim of controlling the output temperature and protecting the glass cover from damage during rainfall with hailstones. The design focused on the incorporation of a polymeric cover. The design takes into consideration the position of the focal line of the collector, therefore, the cover slider was placed at a point above the absorber pipe. A prototype of the resulting product will be installed on the roof top of Building 2 of the Faculty of Engineering and the Built Environment, Tshwane University of Technology, Staatsartillerie Road, 0183, Pretoria West Campus, Pretoria, South Africa.
{"title":"Design and Modification of Parabolic Trough Solar Collector for Performance Effectiveness","authors":"I. Ibrahim, Y. Hamam, Y. Alayli, T. Jamiru, R. Sadiku","doi":"10.1109/redec49234.2020.9163896","DOIUrl":"https://doi.org/10.1109/redec49234.2020.9163896","url":null,"abstract":"Globally, parabolic trough solar collector installation is in high demand among the various concentrating solar power (CSP) technologies due to the high energy demand. The design involves the bending of a flexible reflective material that concentrates the solar irradiation that lands on the collector surface to the focal line; this is where the absorber pipe is positioned. This paper presents a modified parabolic trough solar collector with the aim of controlling the output temperature and protecting the glass cover from damage during rainfall with hailstones. The design focused on the incorporation of a polymeric cover. The design takes into consideration the position of the focal line of the collector, therefore, the cover slider was placed at a point above the absorber pipe. A prototype of the resulting product will be installed on the roof top of Building 2 of the Faculty of Engineering and the Built Environment, Tshwane University of Technology, Staatsartillerie Road, 0183, Pretoria West Campus, Pretoria, South Africa.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130010679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.1109/REDEC49234.2020.9163840
R. Haroun, A. E. Aroudi
In this paper, theoretical modeling, design and numerical simulations are presented for a dc-dc dual active bridge (DAB) converter in a Phtovoltaic (PV)-based nanogrid. Different tasks in the nanogrid are performed using the same topology. A case study of a nanogird with three PV modules connected to a regulated dc bus using three DAB converters will be considered. For these DAB converters, the input voltage is controlled based on natural sampling fixed frequency pulse width modulation. The dc bus is regulated by using a grid-connected dc-ac inverter injecting the harvested PV power to the grid while performing active power quality control. The dc bus is also connected to a storage battery through a bidirectional DAB converter operating as a battery charger/discharger. The Numerical simulation results show the validity of the mathematical model and the capability of the DAB converter to perform all the previous tasks in a PV-based nanogrid.
{"title":"Analysis, Design, and Simulation of a Dual Active Bridge for PV-based Residential Nanogrids","authors":"R. Haroun, A. E. Aroudi","doi":"10.1109/REDEC49234.2020.9163840","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163840","url":null,"abstract":"In this paper, theoretical modeling, design and numerical simulations are presented for a dc-dc dual active bridge (DAB) converter in a Phtovoltaic (PV)-based nanogrid. Different tasks in the nanogrid are performed using the same topology. A case study of a nanogird with three PV modules connected to a regulated dc bus using three DAB converters will be considered. For these DAB converters, the input voltage is controlled based on natural sampling fixed frequency pulse width modulation. The dc bus is regulated by using a grid-connected dc-ac inverter injecting the harvested PV power to the grid while performing active power quality control. The dc bus is also connected to a storage battery through a bidirectional DAB converter operating as a battery charger/discharger. The Numerical simulation results show the validity of the mathematical model and the capability of the DAB converter to perform all the previous tasks in a PV-based nanogrid.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132075577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.1109/REDEC49234.2020.9163880
Yassmine Rghif, B. Zeghmati, F. Bahraoui
A two-dimensional numerical study is developed to investigate the impact of Soret and Dufour effects on temperatures, heat storage and storage efficiency of a salt gradient solar pond (SGSP). It consists of a square enclosure filled with a mixture of water and salt. The vertical and bottom walls are adiabatic and impermeable. The transfer equations are solved using the finite volume method and the Gauss method. The link between the pressure and velocity fields is assumed by the SIMPLE algorithm. The numerical code, developed and written in FORTRAN 95, was validated by applying it to experimental and numerical studies of the literature. We analyze the influence of Dufour and Soret effects on heat storage and the efficiency of the SGSP. Simulations of the functioning of the SGSP were performed using meteorological data of Tangier (Morocco). Results show that the Dufour effect on the thermal performance of the SGSP is more pronounced than that the Soret effect.
{"title":"Soret and Dufour effects on thermal storage and storage efficiency of a salt gradient solar pond","authors":"Yassmine Rghif, B. Zeghmati, F. Bahraoui","doi":"10.1109/REDEC49234.2020.9163880","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163880","url":null,"abstract":"A two-dimensional numerical study is developed to investigate the impact of Soret and Dufour effects on temperatures, heat storage and storage efficiency of a salt gradient solar pond (SGSP). It consists of a square enclosure filled with a mixture of water and salt. The vertical and bottom walls are adiabatic and impermeable. The transfer equations are solved using the finite volume method and the Gauss method. The link between the pressure and velocity fields is assumed by the SIMPLE algorithm. The numerical code, developed and written in FORTRAN 95, was validated by applying it to experimental and numerical studies of the literature. We analyze the influence of Dufour and Soret effects on heat storage and the efficiency of the SGSP. Simulations of the functioning of the SGSP were performed using meteorological data of Tangier (Morocco). Results show that the Dufour effect on the thermal performance of the SGSP is more pronounced than that the Soret effect.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133648936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The use of renewable energy sources (RES) has increased significantly in recent years, in particular, photovoltaic energy which is one of the RES most used for electricity production. Indeed, the world has experienced the installation of a huge number of photovoltaic systems, autonomous or connected to the electricity distribution grid. However, the improvisational nature of solar energy negatively influences the stability and reliability of the electricity grid. One of the best solutions to stabilize and secure the operation of the network is to forecast energy production and to promote the integration of photovoltaic energy on a large scale.In this context, this work aims to develop appropriate forecasting models in the forecasting of photovoltaic energy production. For this reason, we have tested machine learning and deep learning techniques to predict time series data for solar irradiation. For this, we used data from preprocessing, training and testing, three types of error metrics are used to evaluate the models. Recurrent neuron network (RNN) as a machine learning model, on the other hand LSTM and GRU as deep learning models have been discussed from the mathematical and practical simulation using the Anaconda and python environment with their math libraries.
{"title":"Deep learning for very short term solar irradiation forecasting","authors":"Wadie Bendali, Ikram Saber, M. Boussetta, Youssef Mourad, Bensalem Bourachdi, Bader Bossoufi","doi":"10.1109/REDEC49234.2020.9163897","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163897","url":null,"abstract":"The use of renewable energy sources (RES) has increased significantly in recent years, in particular, photovoltaic energy which is one of the RES most used for electricity production. Indeed, the world has experienced the installation of a huge number of photovoltaic systems, autonomous or connected to the electricity distribution grid. However, the improvisational nature of solar energy negatively influences the stability and reliability of the electricity grid. One of the best solutions to stabilize and secure the operation of the network is to forecast energy production and to promote the integration of photovoltaic energy on a large scale.In this context, this work aims to develop appropriate forecasting models in the forecasting of photovoltaic energy production. For this reason, we have tested machine learning and deep learning techniques to predict time series data for solar irradiation. For this, we used data from preprocessing, training and testing, three types of error metrics are used to evaluate the models. Recurrent neuron network (RNN) as a machine learning model, on the other hand LSTM and GRU as deep learning models have been discussed from the mathematical and practical simulation using the Anaconda and python environment with their math libraries.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134183408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.1109/redec49234.2020.9163862
Amine Mounaam, Yasser Harmen, Y. Chhiti, A. Souissi, M. Salouhi, K. Benjelloun, Mohamed Elkhouakhi, L. Deshayes
Tubular exchangers are among the most widely used exchangers in the industrial sector. It is essentially divided into two most common categories: shell and tube heat exchangers (STHE) and coaxial exchangers. It is also possible to consider a STHE as a sum of simple coaxial tubes, which greatly facilitates the understanding and modeling of STHE. Currently, the optimization of heat transfer in exchanger is a recurring problem for thermal engineers. Therefore, several numerical and experimental studies have been carried out. In this paper, the experimental and numerical study of heat transfer and dynamic behavior analysis of tubular heat exchanger (HE) is carried out in order to optimize the energetic performance of the exchanger. Experimentally, two configurations of co-current and counter-current exchangers have been investigated. Theoretically, the dynamic modeling and simulation of the HE was performed using Matlab/Simulink, Unisim-Design simulator, ANSYS-Fluent and Comsol multiphysics commercial software. The models' results were validated experimentally with very good agreement of 99%. Finally, the developed models are confronted to an industrial case of sulfuric acid cooling unit. The results obtained have a very good accuracy of 98.99% with the real plant data.
{"title":"Dynamic behavior analysis of tubular heat exchanger: Experimental and theoretical study","authors":"Amine Mounaam, Yasser Harmen, Y. Chhiti, A. Souissi, M. Salouhi, K. Benjelloun, Mohamed Elkhouakhi, L. Deshayes","doi":"10.1109/redec49234.2020.9163862","DOIUrl":"https://doi.org/10.1109/redec49234.2020.9163862","url":null,"abstract":"Tubular exchangers are among the most widely used exchangers in the industrial sector. It is essentially divided into two most common categories: shell and tube heat exchangers (STHE) and coaxial exchangers. It is also possible to consider a STHE as a sum of simple coaxial tubes, which greatly facilitates the understanding and modeling of STHE. Currently, the optimization of heat transfer in exchanger is a recurring problem for thermal engineers. Therefore, several numerical and experimental studies have been carried out. In this paper, the experimental and numerical study of heat transfer and dynamic behavior analysis of tubular heat exchanger (HE) is carried out in order to optimize the energetic performance of the exchanger. Experimentally, two configurations of co-current and counter-current exchangers have been investigated. Theoretically, the dynamic modeling and simulation of the HE was performed using Matlab/Simulink, Unisim-Design simulator, ANSYS-Fluent and Comsol multiphysics commercial software. The models' results were validated experimentally with very good agreement of 99%. Finally, the developed models are confronted to an industrial case of sulfuric acid cooling unit. The results obtained have a very good accuracy of 98.99% with the real plant data.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117150017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.1109/redec49234.2020.9163867
Abdelnaser Dwaikat, S. Abu-Eisheh
The energy sector in developing countries plays a key role in their socio-economic development. The sector is facing many challenges, including the escalating demand on energy, the high cost of fuel, importing energy or fuel from external markets, and the unreliable energy supplies. Moving towards renewable energy is also meeting difficulties, especially in terms of delivering the energy needed with reasonable costs. Strategic planning approach is utilized to guide moving towards renewable energy in the developing countries. The aim of this research is to explore the proper measures to deal with the identified key factors that affect progress towards renewable energy, and formulate a strategic framework to support shifting towards renewable energy in the developing countries. Palestine is taken as the case study that could be considered as an example of a lower-middle income developing country. Proper analysis is conducted for the energy sector in Palestine considering the SWOT approach, considering the internal status and the external environment. Based on such analysis, the proposed framework for strategic planning for renewable energy is formulated. The framework has identified the goals and objectives, as well as the strategies and actions. The output of this study would lay the foundation to debate and adopt the framework in partnership with other stakeholders. Key strategies are defined including those in the economic, technical, organizational, regulatory, and behavioural areas.
{"title":"Strategic Planning for Renewable Energy in Developing Countries: Palestine as a Case Study","authors":"Abdelnaser Dwaikat, S. Abu-Eisheh","doi":"10.1109/redec49234.2020.9163867","DOIUrl":"https://doi.org/10.1109/redec49234.2020.9163867","url":null,"abstract":"The energy sector in developing countries plays a key role in their socio-economic development. The sector is facing many challenges, including the escalating demand on energy, the high cost of fuel, importing energy or fuel from external markets, and the unreliable energy supplies. Moving towards renewable energy is also meeting difficulties, especially in terms of delivering the energy needed with reasonable costs. Strategic planning approach is utilized to guide moving towards renewable energy in the developing countries. The aim of this research is to explore the proper measures to deal with the identified key factors that affect progress towards renewable energy, and formulate a strategic framework to support shifting towards renewable energy in the developing countries. Palestine is taken as the case study that could be considered as an example of a lower-middle income developing country. Proper analysis is conducted for the energy sector in Palestine considering the SWOT approach, considering the internal status and the external environment. Based on such analysis, the proposed framework for strategic planning for renewable energy is formulated. The framework has identified the goals and objectives, as well as the strategies and actions. The output of this study would lay the foundation to debate and adopt the framework in partnership with other stakeholders. Key strategies are defined including those in the economic, technical, organizational, regulatory, and behavioural areas.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125087734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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