{"title":"A Review of Experimental Scope, Designs and Methods from Intermediate-fast Pyrolysis of Biomass","authors":"G. Charis, G. Danha, E. Muzenda, N. Nkosi","doi":"10.1109/IRSEC48032.2019.9078189","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078189","url":null,"abstract":"Intermediate and fast pyrolysis (IFP) for the recovery of bio-oil from organic matter have gained the attention of researchers in their attempt to increase the contribution of renewables into the energy mix. Current research has focused on equipment configuration and variables for higher yields of the oils; methods of upgrading the oils for compatibility with existing fuel infrastructure and engines, and various tests to characterize the products or test their applicability as fuels. This paper reviews the progress in experimental work around intermediate-fast pyrolysis (hot vapour residence~1-20s; moderate to high liquid yields) in the past twelve years. The review focuses on the experimental scope, equipment used, preparation of raw materials, experimental design and characterization of bio-oils. Experimental work covering actual applications of the oils are not covered in this review paper. The feedstocks mostly researched on in IFP were rice husks, followed by pinewood, Jatropha curcas cake and rapeseed respectively. Most IFP studies have been done on woody biomass (over 100 different feedstocks) due to their consistency, followed by agricultural residues then herbaceous energy crops. Lignocellulosics proved to be the veteran organic feedstocks (~95% of IFP) ahead of non-lignocellulosic biomass (~5%). The most applied technologies in recent years, were fluidized bed followed by the free fall reactors. For the experimental design, most papers reviewed used the simple single parameter method, while a few used the central composite rotatable design and full factorial design methods. The characterization tests mostly conducted on the oils were the pH, viscosity, Karl Fischer titration and calorific value.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"44 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84236593","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}
Sofian Talbi, K. Kassmi, I. Atmane, O. Deblecker, Noureddine Elmoussaoui
{"title":"Feasibility of a Box-type Solar Cooker Powered by Photovoltaic Energy","authors":"Sofian Talbi, K. Kassmi, I. Atmane, O. Deblecker, Noureddine Elmoussaoui","doi":"10.1109/IRSEC48032.2019.9078275","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078275","url":null,"abstract":"In this paper, we have realized and experimented a box-type solar cooker that is powered by photovoltaic energy. Under an illumination of 770 W / m2, an ambient temperature of 18°C and electrical power of 340 W, the results show, on the one hand, a temperature of the thermal resistance which heats the cooker equal to 686°C, and, on the other hand, a temperature and a thermal efficiency of the cooker worth 200°C and 77%, respectively. Heating one liter of water yields a boiling time of 50 minutes, and the time needing for complete evaporation is of the order of 3 hours. In addition, the results show very significant improvements compared to thermal cookers operating directly to the sun, namely 53% increase of the heating temperature and 60 % decrease on its heating duration. All the results and performances obtained in this work demonstrate the feasibility of box-type solar cookers, powered by photovoltaic energy inside homes.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"87 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84389841","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}
{"title":"Study of Interaction of Hydrogen with Di-aza-substituted Sumanene Compounds","authors":"S. N. Derrar","doi":"10.1109/IRSEC48032.2019.9078312","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078312","url":null,"abstract":"This DFT study aims at investigating hydrogen storage by the bowl-shaped sumanene molecule. Different models have been constructed, by substituting the rim positions of sumanene by nitrogen atoms. Subsequently, based on a comparison to pristine sumanene, effects of this nitrogen doping have been explored. Interaction energies between hydrogen molecule and the di-aza-substituted sumanene have been reported. The substitution position seems to govern the parameters studied, mainly, the interaction energy.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"7 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78707243","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}
{"title":"Pilot Scale Tar Production from Morupule Coal Dust Through Flash Pyrolysis","authors":"Abigail Tamu, E. Muzenda, M. Rapoo, B. Patel","doi":"10.1109/IRSEC48032.2019.9078314","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078314","url":null,"abstract":"The fourth industrial revolution promotes green and cleaner processes, pyrolysis being one of the strategies for waste utilization. In Palapye, Botswana, dust produced in the process of mining, beneficiation and utilization of coal at Morupule Mine and Power Plants causes serious health hazards to the employees, residents of Palapye and surrounding communities. Pyrolysis of coal dust is one of the wastes to energy technique that can be adopted to utilize waste coal dust. Botswana relies on imported tar to upgrade dusty roads while it has sufficient resources to produce its own tar from coal. One of the main products for pyrolysis of coal dust is tar which can be used to construct roads and pavements. This study utilizes coal dust from Morupule coal mine for tar production using flash pyrolysis in a batch reactor at pilot scale. Morupule coal dust was characterized before pyrolysis and the highest recorded yield is 22.9% kg at 600 C.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"47 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91141342","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}
Mohammed Zerouali, Salaheddine Zouirech, Abdelghani El Ougli, B. Tidhaf, Hafida Zrouri
{"title":"Improvement of Conventional MPPT Techniques P&O and INC by Integration of Fuzzy Logic","authors":"Mohammed Zerouali, Salaheddine Zouirech, Abdelghani El Ougli, B. Tidhaf, Hafida Zrouri","doi":"10.1109/IRSEC48032.2019.9078330","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078330","url":null,"abstract":"This paper presents the most popular techniques used to track and extract maximum power point for a photovoltaic system as traditional ones: Perturb and Observe ‘P&O’, Increment of the conductance ‘INC’ or intelligent using Fuzzy logic FL. And by combining two techniques, P&O with the Fuzzy logic (Fuzzy-P&O) and the INC with the fuzzy (Fuzzy-INC), the proposed system allows us to generate more power and reduce the voltage ripple which guarantees a stable system. All modeling and simulations of different MPPT techniques are done under Matlab Simulink environment. Therefore, the simulation results show the performance and limitations of each algorithm and the efficiency of the combined techniques.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"56 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91384877","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}
M. Ibrahimi, I. Khay, Anas El Maakoul, M. Bakhouya
{"title":"Thermal Modeling of a Pilot-scale Liquid Recirculation Anaerobic Digester","authors":"M. Ibrahimi, I. Khay, Anas El Maakoul, M. Bakhouya","doi":"10.1109/IRSEC48032.2019.9078203","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078203","url":null,"abstract":"A multitude of parameters affect the speed, maximal yield, quality of obtained biogas and several other important factors in the complex process of anaerobic digestion. One of these parameters is the temperature distribution inside the digester. It was noticed that when no form of stirring takes place inside the digester, a temperature gradient forms due to the natural convection phenomenon. The presence of this gradient is undesirable in most anaerobic digestion applications, since it would cause the anaerobic bacteria to suffer from upsetting temperature changes, triggering a noticeable slowdown and even a failure of the process. As stirring would fix this temperature gradient issue, an alternative low-cost solution is investigated in this study. This potential solution manifests in changing the placement of the solid waste layer inside the liquid recirculation digester to allow it to always be at an optimal temperature. Experiments and simulations have been conducted to better understand the thermal behavior of the digester, then a model was developed and validated to numerically simulate the observed phenomena. It was concluded that the occurrence of this gradient is independent of the contents of the digester, while in the same time it was established that the optimal location for the solid waste layer is between the heating elements.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"228 2","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91479510","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}
{"title":"Comparative Study of Electric Vehicle Energy Consumption between Trunk Roads and Highways","authors":"Salima El Amrani, Mohammed Chennani, D. Belkhayat","doi":"10.1109/IRSEC48032.2019.9078169","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078169","url":null,"abstract":"The transportation field is one of the most important in energy consumption and it must move towards more sustainable development. Indeed, global warming is a reality and air pollution is worrying especially in large cities. In addition, the depletion of fossil resources is looming. Electric vehicles (EVs) are currently considered as the promising solution for reducing the dependence of transport on fossil fuels. Nevertheless, the overall adoption of these vehicles is disturbed by range limits of EVs. Therefore, it is necessary to predict the required power to drive and plan for charging whenever needed. The aim of this paper is to introduce a software tool permitting to predict and estimate energy consumption for any desired road. The software tool is based on mathematical model of the EV, which relates the energy to different factors such as the velocity, the acceleration and the road slope. In other side, this paper presents a comparative study between the highways and the trunk roads. The road chosen is Marrakech to Casablanca based on two different driving cycles, each one corresponding to a specific road. This method can be used for any EV, which the characteristics are known. Using the proposed model, the results show that EVs are more efficient in trunk roads than highways taking into account the energy recovery during the frequent braking.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"46 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90449193","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}
L. Zaghba, M. Khennane, A. Borni, A. Fezzani, A. Bouchakour, I. H. Mahammed, S. H. Oudjana
{"title":"A Genetic Algorithm based Improve P&O-PI MPPT Controller for Stationary and Tracking Grid-Connected Photovoltaic System","authors":"L. Zaghba, M. Khennane, A. Borni, A. Fezzani, A. Bouchakour, I. H. Mahammed, S. H. Oudjana","doi":"10.1109/IRSEC48032.2019.9078304","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078304","url":null,"abstract":"This paper deals the performance comparison and efficiencies of single-axis and dual-axis tracking PV system to an identical fixed-mount PV system for two typical clear sunny days (Ghardaia area), two typical days are chosen, the first day in winter and the second day in the summer. For the three types of PV systems, P&O-PI MPPT techniques optimized with a genetic algorithm is proposed. This paper has two different objectives. 1stly, a proposed MPPT technique has been presented to optimize P&O-PI controller via the GA technique to increase the tracking response of MPP with high efficiency and that improves the limitations of the traditional MPPT techniques. 2ndly, a performance comparison of efficiencies of single-axis and dual-axis tracking system and an identical fixed inclination system. Simulation results with MATLAB/SIMULINK are presented and discussed to verify the satisfactory performance of the proposed MPPT control, in which the optimized P&O-PI controller by GA algorithms gives the better performance. The simulation results also have shown that both single-axis and dual-axis are highly efficient in terms of the electrical energy output when compared to the fixed mount system. The results show the effectiveness of the tracking system of about 25% in energy efficiency.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"105 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80770662","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}
{"title":"Complex On-Off Air-Conditioning Control Strategy for Peak Demand Reduction in Desert Climate Conditions","authors":"Mohammed Al-Azba, Zhaohui Cen, S. Ahzi, Y. Rémond","doi":"10.1109/IRSEC48032.2019.9078186","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078186","url":null,"abstract":"In this study, a pragmatic engineering approach is proposed to assist in addressing the high-power consumption for cooling specifically, peak demand issues in countries with desert climate conditions. In this approach, an improved control scheme for cooling buildings is developed to minimize load peak demand by managing to space cooling demands in a more holistic organized manner rather than being randomly managed. In addition, a mathematical model of a typical house cooling system is developed along with a complex multi-mode logic controller. Finally, The simulation results demonstrate the ability of the proposed control scheme to considerably reduce power peaks while maintaining an adequate level of indoor comfort.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"44 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75673144","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}
{"title":"Borohydride-based Solid-state Electrolytes for Lithium Batteries","authors":"A. El Kharbachi, M. Sørby, M. Nygård, B. Hauback","doi":"10.1109/IRSEC48032.2019.9078280","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078280","url":null,"abstract":"Properties of LiBH<inf>4</inf>-LiCl-P<inf>2</inf>S<inf>5</inf> composites are studied regarding their application as solid-state electrolyte for lithium batteries. The studied materials undergo an amorphization at 60°C, accompanied with Li<sup>+</sup> conduction increase. The measured ionic conductivity for the optimized borohydride-halide-sulfide system is about ~10<sup>−3</sup> S cm<sup>−1</sup> at room temperature with low activation energies for ions migration suitable for all-solid-state battery applications near room temperature.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"20 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78953391","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}