Pub Date : 2020-06-01DOI: 10.1109/REDEC49234.2020.9163607
A. Slimi, M. Hachi, A. Fitri, A. Benjelloun, M. Benzakour, M. Mcharfi
Dye Sensitized Solar Cells (DSSC) are a low-cost alternative to our renewable energy sources in recent decades because they have a potential to achieve high power conversion efficiency (PCE) and their devices are easy to manufacture. For a better understanding of the charge transport process involved in the DSSCs, we studied the effect of conjugation on the electron structure and optical properties of triphenylamine derivatives, we carried out a theoretical study on six organic dyes synthesized by Yu et al. In this work, we studied the effect of different substituents on the electronic and optical properties of six triphenylamine dyes using quantum chemistry methods such as DFT and TDDFT. These calculations were undertaken by the functional hybrid exchange and correlation B3LYP and the base 6-31G (d, p). This model allowed us to determine the optimized structures and the electronic and optical properties (EHOMO, ELUMO, Egap, $lambda_{abs}$, Voc….) Of various dyes studied. We note that the dye P6 exhibits the lowest gap energy and reasonable Voc value. We also simulated the UV-visible spectrum by using the TD-DFT with two functionals CAM-B3LYP and WB97XD to give a look for their effect on optical properties introducing the effect of the solvent (THF). Our results show that the six studied dyes absorb in the visible and are a good promising choice for DSSCs.
{"title":"DFT and TD-DFT study of novel triphenylamine based organic dyes for dye-sensitized solar cells","authors":"A. Slimi, M. Hachi, A. Fitri, A. Benjelloun, M. Benzakour, M. Mcharfi","doi":"10.1109/REDEC49234.2020.9163607","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163607","url":null,"abstract":"Dye Sensitized Solar Cells (DSSC) are a low-cost alternative to our renewable energy sources in recent decades because they have a potential to achieve high power conversion efficiency (PCE) and their devices are easy to manufacture. For a better understanding of the charge transport process involved in the DSSCs, we studied the effect of conjugation on the electron structure and optical properties of triphenylamine derivatives, we carried out a theoretical study on six organic dyes synthesized by Yu et al. In this work, we studied the effect of different substituents on the electronic and optical properties of six triphenylamine dyes using quantum chemistry methods such as DFT and TDDFT. These calculations were undertaken by the functional hybrid exchange and correlation B3LYP and the base 6-31G (d, p). This model allowed us to determine the optimized structures and the electronic and optical properties (EHOMO, ELUMO, Egap, $lambda_{abs}$, Voc….) Of various dyes studied. We note that the dye P6 exhibits the lowest gap energy and reasonable Voc value. We also simulated the UV-visible spectrum by using the TD-DFT with two functionals CAM-B3LYP and WB97XD to give a look for their effect on optical properties introducing the effect of the solvent (THF). Our results show that the six studied dyes absorb in the visible and are a good promising choice for DSSCs.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"21 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":"122227259","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/REDEC49234.2020.9163905
Kazi Mohamed amine, Machkour Nadia, Majdoul Radouane
today, electricity transmission capacity is growing due to renewable energy generation and the needs of the electricity market. The result is a major breakthrough in the development of HVDC transport systems to overcome the limitations of HVAC transport systems. This progress is linked to the innovation of new topologies of power converters which play a key role in providing the high reliability, good efficiency and cost-effectiveness of HVDC transport systems. This article discusses a non-linear control approach based on the Adaptive Backstepping method in order to regulate the DC bus voltage and ensure stability of the HVDC system despite disturbances. The validity of the proposed control is tested by simulation in the Matlab/Simulink environment under different operating conditions and effectively demonstrates its contribution to improving the performance of our system.
{"title":"Adaptive Backstepping Control and Stabilization of VSC-HVDC Systems","authors":"Kazi Mohamed amine, Machkour Nadia, Majdoul Radouane","doi":"10.1109/REDEC49234.2020.9163905","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163905","url":null,"abstract":"today, electricity transmission capacity is growing due to renewable energy generation and the needs of the electricity market. The result is a major breakthrough in the development of HVDC transport systems to overcome the limitations of HVAC transport systems. This progress is linked to the innovation of new topologies of power converters which play a key role in providing the high reliability, good efficiency and cost-effectiveness of HVDC transport systems. This article discusses a non-linear control approach based on the Adaptive Backstepping method in order to regulate the DC bus voltage and ensure stability of the HVDC system despite disturbances. The validity of the proposed control is tested by simulation in the Matlab/Simulink environment under different operating conditions and effectively demonstrates its contribution to improving the performance of our system.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"55 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":"131663125","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/REDEC49234.2020.9163848
Jean H. El Achkar, Rita Ziade, N. Louka, R. Maroun, Zeina Hobaika
Treatment and management of lactoserum from dairy industry has become a global issue. In fact, generated effluents have high organic loads (lactose, protein, vitamin, minerals etc.) constituting a major source of environmental pollution. In a sustainable green approach, anaerobic digestion is considered a promising solution for the treatment of lactoserum or cheese whey. At first, we conducted a biochemical characterization showing a lactose composition of 52 and 46 g/kg, for sweet and acidic cheese whey, respectively, with an average COD of about 70 g/kg. The biodegradability of sweet lactoserum showed an extremely high value of 97% equivalent to 0.34 $mathrm{N}mathrm{m}^{3}mathrm{C}mathrm{H}_{4}cdot mathrm{k}mathrm{g} mathrm{C}mathrm{O}mathrm{D}^{-1}$. However, low biodegradability was noted for acidic lactoserum with a value of17%. This highlights the importance of the use of the sweet one in terms of energy recovery. For the optimization of the process, we also tried an incursion towards little explored tracks by evaluating the intensification of methane production, applying ultrasounds pretreatment on inoculum. The best yield was obtained after sonication with an energy input of 90 kJ/kg.
{"title":"Treatment of dairy waste by anaerobic digestion to produce methane as green energy","authors":"Jean H. El Achkar, Rita Ziade, N. Louka, R. Maroun, Zeina Hobaika","doi":"10.1109/REDEC49234.2020.9163848","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163848","url":null,"abstract":"Treatment and management of lactoserum from dairy industry has become a global issue. In fact, generated effluents have high organic loads (lactose, protein, vitamin, minerals etc.) constituting a major source of environmental pollution. In a sustainable green approach, anaerobic digestion is considered a promising solution for the treatment of lactoserum or cheese whey. At first, we conducted a biochemical characterization showing a lactose composition of 52 and 46 g/kg, for sweet and acidic cheese whey, respectively, with an average COD of about 70 g/kg. The biodegradability of sweet lactoserum showed an extremely high value of 97% equivalent to 0.34 $mathrm{N}mathrm{m}^{3}mathrm{C}mathrm{H}_{4}cdot mathrm{k}mathrm{g} mathrm{C}mathrm{O}mathrm{D}^{-1}$. However, low biodegradability was noted for acidic lactoserum with a value of17%. This highlights the importance of the use of the sweet one in terms of energy recovery. For the optimization of the process, we also tried an incursion towards little explored tracks by evaluating the intensification of methane production, applying ultrasounds pretreatment on inoculum. The best yield was obtained after sonication with an energy input of 90 kJ/kg.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"62 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":"127697873","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/REDEC49234.2020.9163832
Haytham M. Dbouk, Fawzi G. Khalife
With the exponential growth that affected the world population during the past two centuries, huge demand for food resulted, and traditional practices could not meet such overwhelming amounts. Newly developed techniques became a must to secure the food need, and aquaponics being one of these technologies, rose as a unique system that mimics the natural lifecycle. Aquaponics systems are still being enhanced to facilitate their use and increase their efficiency. This paper introduces an autonomous solar-based aquaponics system that utilized solar energy to meet water temperature demands of the fish and plants within the system. A pilot system is also presented and results are shown and discussed, illustrating the added efficiency and benefits such integration offers to aquaponics. The experimental results obtained during the past 6 months show that this system offers 30% productivity increase upon 60% saving in required space for this planting and 40% water savings.
{"title":"Autonomous Solar-Based Aquaponics: Towards Agricultural Sustainability in Lebanon and the Region","authors":"Haytham M. Dbouk, Fawzi G. Khalife","doi":"10.1109/REDEC49234.2020.9163832","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163832","url":null,"abstract":"With the exponential growth that affected the world population during the past two centuries, huge demand for food resulted, and traditional practices could not meet such overwhelming amounts. Newly developed techniques became a must to secure the food need, and aquaponics being one of these technologies, rose as a unique system that mimics the natural lifecycle. Aquaponics systems are still being enhanced to facilitate their use and increase their efficiency. This paper introduces an autonomous solar-based aquaponics system that utilized solar energy to meet water temperature demands of the fish and plants within the system. A pilot system is also presented and results are shown and discussed, illustrating the added efficiency and benefits such integration offers to aquaponics. The experimental results obtained during the past 6 months show that this system offers 30% productivity increase upon 60% saving in required space for this planting and 40% water savings.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"56 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":"116823013","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 : 2020-03-24DOI: 10.1109/redec49234.2020.9163604
B. Nehme, N. M'Sirdi, T. Akiki, B. Zeghondy
PV panels are affected by many degradation modes. We list the Potential Induced Degradation, the Light Induced Degradation, the UltraViolet Light Degradation, the Moisture Induced Degradation, and the Cell Cracks. These degradation modes are affected by external environmental conditions as irradiance, temperature and humidity. The common factor that affects the degradation modes is temperature. The degradation process follows an Arrhenius equation; it is exponentially related to temperature. In this paper we evaluate precisely the effect of temperature on the degradation process of PV panels.
{"title":"Assessing the Effect of Temperature on Degradation Modes of PV Panels","authors":"B. Nehme, N. M'Sirdi, T. Akiki, B. Zeghondy","doi":"10.1109/redec49234.2020.9163604","DOIUrl":"https://doi.org/10.1109/redec49234.2020.9163604","url":null,"abstract":"PV panels are affected by many degradation modes. We list the Potential Induced Degradation, the Light Induced Degradation, the UltraViolet Light Degradation, the Moisture Induced Degradation, and the Cell Cracks. These degradation modes are affected by external environmental conditions as irradiance, temperature and humidity. The common factor that affects the degradation modes is temperature. The degradation process follows an Arrhenius equation; it is exponentially related to temperature. In this paper we evaluate precisely the effect of temperature on the degradation process of PV panels.","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132498735","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 : 2020-03-23DOI: 10.1109/REDEC49234.2020.9163592
H. Bouchareb, K. Saqli, N. M'Sirdi, M. O. Bentaie, A. Naamane
In this paper, Lithium-Ion battery is modeled as a second-order RC Equivalent Circuit Model (ECM). The battery has been analysed and physically simulated by a software using infinite dimensional equations (Comsol) to get realistic data. The latter has been used to estimate the parameters of this model. Furthermore, the battery State of Charge (SOC) is then estimated based on an improved Sliding Mode Observer (SMO).
{"title":"Sliding Mode Observer Design for Battery State of Charge estimation","authors":"H. Bouchareb, K. Saqli, N. M'Sirdi, M. O. Bentaie, A. Naamane","doi":"10.1109/REDEC49234.2020.9163592","DOIUrl":"https://doi.org/10.1109/REDEC49234.2020.9163592","url":null,"abstract":"In this paper, Lithium-Ion battery is modeled as a second-order RC Equivalent Circuit Model (ECM). The battery has been analysed and physically simulated by a software using infinite dimensional equations (Comsol) to get realistic data. The latter has been used to estimate the parameters of this model. Furthermore, the battery State of Charge (SOC) is then estimated based on an improved Sliding Mode Observer (SMO).","PeriodicalId":371125,"journal":{"name":"2020 5th International Conference on Renewable Energies for Developing Countries (REDEC)","volume":"28 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122579951","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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