Pub Date : 2016-02-29DOI: 10.1109/ICDRET.2016.7421528
M. Tariq, M. T. Iqbal, A. Iqbal, M. Meraj, Muhammad M. Roomi, Md Shafquat Ullah Khan
This paper presents an evaluation of two modulation methods for the seven-level packed U cell (PUC) inverter for photovoltaic applications. The PUC is a multilevel inverter which has less number of switching devices than the conventional multilevel inverters. The PUC inverter is in modular configuration consisting of one U-cell and four additional power switches, one dc link and an auxiliary capacitor. A U cell is called an arrangement of two power switches and one flying or clamping capacitor. In this paper, the level-shifted (LS-PWM) and phase-shifted PWM (PS-PWM) for triangular carrier are presented and compared. Harmonic analysis for both the cases has been performed and phase-shifted triangular carrier has been found to have the minimum harmonics. The difference in harmonics of the two modulation methods for the triangular carrier is confirmed by the theoretical approach and verified by simulation in MATLAB® Simulink environment, and simulation results are presented and discussed in the paper.
{"title":"Comparative analysis of carrier schemes for PWM in multilevel PUC inverter for PV applications","authors":"M. Tariq, M. T. Iqbal, A. Iqbal, M. Meraj, Muhammad M. Roomi, Md Shafquat Ullah Khan","doi":"10.1109/ICDRET.2016.7421528","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421528","url":null,"abstract":"This paper presents an evaluation of two modulation methods for the seven-level packed U cell (PUC) inverter for photovoltaic applications. The PUC is a multilevel inverter which has less number of switching devices than the conventional multilevel inverters. The PUC inverter is in modular configuration consisting of one U-cell and four additional power switches, one dc link and an auxiliary capacitor. A U cell is called an arrangement of two power switches and one flying or clamping capacitor. In this paper, the level-shifted (LS-PWM) and phase-shifted PWM (PS-PWM) for triangular carrier are presented and compared. Harmonic analysis for both the cases has been performed and phase-shifted triangular carrier has been found to have the minimum harmonics. The difference in harmonics of the two modulation methods for the triangular carrier is confirmed by the theoretical approach and verified by simulation in MATLAB® Simulink environment, and simulation results are presented and discussed in the paper.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126802071","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 : 2016-02-29DOI: 10.1109/ICDRET.2016.7421512
Pradeep Parajuli, P. Koirala, N. Pokharel, H. Neopane, S. Chitrakar, R. Maskey
As the threat of limited energy has reached its peak, a system that utilizes majority of the unutilized sites to extract energy is demanded. The project work, presented here, aims to propose an efficient system to exploit the low head sites, test and verify the technical feasibility and economical affordability of thus proposed system. The research was carried out to develop ultra-low head turbines that exploits the sites with lower head and lower discharge using only limited hydraulic and mechanical components satisfying the economic viability [1]. Three models were prepared and one was successfully tested to verify the operating principle called "Static Pressure Difference principle". Focusing on blade profile, mesh generation CFX package was used to analyze the fluid flow through turbine hub and blade. This approach was carried out on three different turbine models with straight, twisted and curved blade profiles and results were used for efficiency evaluation of each turbines. The simulation result showed curved profile to be best efficient profile than other two with 87.03 % efficiency and well distinguished pressure and suction side within a blade. The produced power was 3 W at rotational speed 12 rpm anticlockwise with torque of 2.45 N-m at the flow rate of 6 l/s. The computational analysis was ensued by scaled model testing in a small irrigation canal with a channel system. The testing showed curved blade turbine model's efficiency of 64.36 % with output power of 2 W at rotational speed of 15 rpm anticlockwise with torque of 1.28 N-m at the flow rate of 6.4 l/s. The head difference was maintained at 5 cm for both type of analysis.
{"title":"Computational and experimental study of an ultra-low head turbine","authors":"Pradeep Parajuli, P. Koirala, N. Pokharel, H. Neopane, S. Chitrakar, R. Maskey","doi":"10.1109/ICDRET.2016.7421512","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421512","url":null,"abstract":"As the threat of limited energy has reached its peak, a system that utilizes majority of the unutilized sites to extract energy is demanded. The project work, presented here, aims to propose an efficient system to exploit the low head sites, test and verify the technical feasibility and economical affordability of thus proposed system. The research was carried out to develop ultra-low head turbines that exploits the sites with lower head and lower discharge using only limited hydraulic and mechanical components satisfying the economic viability [1]. Three models were prepared and one was successfully tested to verify the operating principle called \"Static Pressure Difference principle\". Focusing on blade profile, mesh generation CFX package was used to analyze the fluid flow through turbine hub and blade. This approach was carried out on three different turbine models with straight, twisted and curved blade profiles and results were used for efficiency evaluation of each turbines. The simulation result showed curved profile to be best efficient profile than other two with 87.03 % efficiency and well distinguished pressure and suction side within a blade. The produced power was 3 W at rotational speed 12 rpm anticlockwise with torque of 2.45 N-m at the flow rate of 6 l/s. The computational analysis was ensued by scaled model testing in a small irrigation canal with a channel system. The testing showed curved blade turbine model's efficiency of 64.36 % with output power of 2 W at rotational speed of 15 rpm anticlockwise with torque of 1.28 N-m at the flow rate of 6.4 l/s. The head difference was maintained at 5 cm for both type of analysis.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"5 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130898939","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 : 2016-02-29DOI: 10.1109/ICDRET.2016.7421480
K. M. Salim, Md Jasim Uddin, M. Rahman, Mohammad Rejwan Uddin
Electric three-wheeler auto rickshaws known as easy bikes are becoming quite common in Bangladesh. Due to obvious advantages offered by these vehicles such as zero carbon emission and no requirement of gas encourages people to transition from traditional fuel-operated vehicle to electric vehicles. The battery charging stations for these vehicles employ bulky chargers containing iron core transformers with maximum efficiency around 80%. As a country which suffers from power shortages, it is highly desirable to have a charger that is more efficient. In this paper, a new type of charger is proposed which uses a ferrite core transformer. A prototype of this charger is built and compared with a conventional charger. It is found from the experiments that the proposed charger exhibits efficiency more than 90%. In addition, the proposed charger weighs only about 2 kilograms, whereas the conventional charger weighs about 10 kilograms.
{"title":"Design, construction and implementation of a highly efficient, lightweight and cost effective battery charger for electric easy bikes","authors":"K. M. Salim, Md Jasim Uddin, M. Rahman, Mohammad Rejwan Uddin","doi":"10.1109/ICDRET.2016.7421480","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421480","url":null,"abstract":"Electric three-wheeler auto rickshaws known as easy bikes are becoming quite common in Bangladesh. Due to obvious advantages offered by these vehicles such as zero carbon emission and no requirement of gas encourages people to transition from traditional fuel-operated vehicle to electric vehicles. The battery charging stations for these vehicles employ bulky chargers containing iron core transformers with maximum efficiency around 80%. As a country which suffers from power shortages, it is highly desirable to have a charger that is more efficient. In this paper, a new type of charger is proposed which uses a ferrite core transformer. A prototype of this charger is built and compared with a conventional charger. It is found from the experiments that the proposed charger exhibits efficiency more than 90%. In addition, the proposed charger weighs only about 2 kilograms, whereas the conventional charger weighs about 10 kilograms.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130455297","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}
In this work a graphene based MIS structure for solar energy conversion has been modeled and analyzed. The MIS structure is formed by inserting an oxide layer in the conventional graphene/n-Si Schottky structure to obtain improved performance. Simulation of the model for this MIS structure shows this performance improvement. Using the simulation results this work also analyzes the effects of semiconductor layer width and semiconductor doping level on the current-voltage characteristics.
{"title":"Modeling of graphene/SiO2/Si(n) based metal-insulator-semiconductor solar cells","authors":"Muhammad Johirul Islam, Md. Mahmudul Hasan, Rifat Sami, Md. Iqbal Bahar Chowdhury","doi":"10.1109/ICDRET.2016.7421491","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421491","url":null,"abstract":"In this work a graphene based MIS structure for solar energy conversion has been modeled and analyzed. The MIS structure is formed by inserting an oxide layer in the conventional graphene/n-Si Schottky structure to obtain improved performance. Simulation of the model for this MIS structure shows this performance improvement. Using the simulation results this work also analyzes the effects of semiconductor layer width and semiconductor doping level on the current-voltage characteristics.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126882496","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 : 2016-02-29DOI: 10.1109/ICDRET.2016.7421503
H. M. Rafeed Leon, M. Asaduzzaman Shoeb, M. Saifur Rahman, M. Ahmed, Md Sadiqul Islam
The core perspective of the work is to represent the design and economic feasibility analysis of an autonomous hybrid energy system for rural Bangladesh. To overcome the many of the environmental crises our country faces today result from our fossil fuel dependency. These impacts include global warming, air quality deterioration, oil spills, or acid rain. In view of this, the hybrid energy systems are becoming popular in remote area for power generation applications due to advancements in renewable energy technologies and substantial rise in prices of petroleum products. A rural village in Narayangonj (Araihazar), Dhaka, Bangladesh (23°36.9'N, 90°30.2'E), has been taken as the case study. The proposed hybrid system consists of solar system (PV) and biogas with the battery and backup diesel generator in case of emergency. This research also attracts the future developments, which have the prospective to increase the economic attractiveness of such systems and their acceptance by the user.
{"title":"Design and economic feasibility analysis of autonomous hybrid energy system for rural Bangladesh","authors":"H. M. Rafeed Leon, M. Asaduzzaman Shoeb, M. Saifur Rahman, M. Ahmed, Md Sadiqul Islam","doi":"10.1109/ICDRET.2016.7421503","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421503","url":null,"abstract":"The core perspective of the work is to represent the design and economic feasibility analysis of an autonomous hybrid energy system for rural Bangladesh. To overcome the many of the environmental crises our country faces today result from our fossil fuel dependency. These impacts include global warming, air quality deterioration, oil spills, or acid rain. In view of this, the hybrid energy systems are becoming popular in remote area for power generation applications due to advancements in renewable energy technologies and substantial rise in prices of petroleum products. A rural village in Narayangonj (Araihazar), Dhaka, Bangladesh (23°36.9'N, 90°30.2'E), has been taken as the case study. The proposed hybrid system consists of solar system (PV) and biogas with the battery and backup diesel generator in case of emergency. This research also attracts the future developments, which have the prospective to increase the economic attractiveness of such systems and their acceptance by the user.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117029923","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 : 2016-02-29DOI: 10.1109/ICDRET.2016.7421482
Khan Md. Rabbi, I. Nandi, A. Saleh, Faiaz Faisal, S. Mojumder
In this paper, an artificial neural network (ANN) model is used to predict the monthly solar energy potential in Bangladesh. Used data are taken from NASA database for the past 22 years average from 1983 to 2005 and eight divisional cities are considered in this study. A multi-layered feed forward ANN model of four layers with eight independent input variables i.e. average temperature, sunshine duration, wind speed, precipitation, humidity, elevation, cloud coverage and atmospheric pressure to predict the monthly solar irradiation. Data from six cities are used for training and the remaining two cities were considered for testing and validation. A solar irradiation map is developed by data mapping using GIS technology. From the illustrations, the predicted data show good agreement with the observed data. This indicates that, this model can be used to predict solar irradiation of Bangladesh and to provide sufficient information about the feasibility of solar powered projects.
{"title":"Prediction of solar irradiation in Bangladesh using artificial neural network (ANN) and data mapping using GIS technology","authors":"Khan Md. Rabbi, I. Nandi, A. Saleh, Faiaz Faisal, S. Mojumder","doi":"10.1109/ICDRET.2016.7421482","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421482","url":null,"abstract":"In this paper, an artificial neural network (ANN) model is used to predict the monthly solar energy potential in Bangladesh. Used data are taken from NASA database for the past 22 years average from 1983 to 2005 and eight divisional cities are considered in this study. A multi-layered feed forward ANN model of four layers with eight independent input variables i.e. average temperature, sunshine duration, wind speed, precipitation, humidity, elevation, cloud coverage and atmospheric pressure to predict the monthly solar irradiation. Data from six cities are used for training and the remaining two cities were considered for testing and validation. A solar irradiation map is developed by data mapping using GIS technology. From the illustrations, the predicted data show good agreement with the observed data. This indicates that, this model can be used to predict solar irradiation of Bangladesh and to provide sufficient information about the feasibility of solar powered projects.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120948638","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 : 2016-02-29DOI: 10.1109/ICDRET.2016.7421476
Muhammad Ahsan Zamee, Kazi Khairul Islam, Ashik Ahmed, Kazi Rehnuma Zafreen
Load Frequency Control (LFC) for any power generating station is a subject of great concern for power system researchers. With the changes of load demand, frequency starts fluctuating which results in deviation in tie line power flow and frequency deviation at consumer end. To overcome this problem, many control techniques have been adopted. In early days fixed value integral/proportional-integral control, Optimal Control, Quantitative feedback theory, pole placement etc. methods were applied. In recent times, neural network, fuzzy logic, genetic algorithm controllers are replacing the conventional techniques. All the control techniques are used to find the optimal values of the PID/PI controller gain parameters (Kp, Ki, Kd) for which system stability is confirmed with minimum of Area Control Error (ACE). Differential Evolution (DE) which is a newer branch of genetic algorithms has been successfully applied in this problem. In this paper DE based PI controller has been implemented for Hydro-Thermal power plants to find out the optimal value of gain parameters for system stability. Nonlinearity has been considered in governor part of the thermal area for practical scenario. 1% step load changes have been applied to both areas simultaneously and individually to confirm its performance. Desired set of controller gain parameters (Kp, Ki) are selected based on eigenvalue and minimum value of Objective Function. All simulations are done in the MATLAB/SIMULINK environment.
任何一个电站的负荷频率控制都是电力系统研究者非常关注的问题。随着负荷需求的变化，频率开始波动，从而引起电网潮流的偏差和用户端的频率偏差。为了克服这个问题，采用了许多控制技术。早期应用定值积分/比例积分控制、最优控制、定量反馈理论、极点放置等方法。近年来，神经网络、模糊逻辑、遗传算法等控制器正在取代传统的控制技术。所有的控制技术都用于寻找PID/PI控制器增益参数(Kp, Ki, Kd)的最优值，以确保系统的稳定性，并使区域控制误差(ACE)最小。差分进化(DE)是遗传算法的一个新分支，已成功地应用于该问题。本文将基于DE的PI控制器应用于火电厂，以求出系统稳定增益参数的最优值。在实际情况下，考虑了热区调节部分的非线性。在两个区域同时或单独施加1%的阶跃负载变化以确认其性能。根据目标函数的特征值和最小值选择期望的控制器增益参数Kp, Ki。所有仿真均在MATLAB/SIMULINK环境中完成。
{"title":"Differential evolution algorithm based load frequency control in a two-area conventional and renewable energy based nonlinear power system","authors":"Muhammad Ahsan Zamee, Kazi Khairul Islam, Ashik Ahmed, Kazi Rehnuma Zafreen","doi":"10.1109/ICDRET.2016.7421476","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421476","url":null,"abstract":"Load Frequency Control (LFC) for any power generating station is a subject of great concern for power system researchers. With the changes of load demand, frequency starts fluctuating which results in deviation in tie line power flow and frequency deviation at consumer end. To overcome this problem, many control techniques have been adopted. In early days fixed value integral/proportional-integral control, Optimal Control, Quantitative feedback theory, pole placement etc. methods were applied. In recent times, neural network, fuzzy logic, genetic algorithm controllers are replacing the conventional techniques. All the control techniques are used to find the optimal values of the PID/PI controller gain parameters (Kp, Ki, Kd) for which system stability is confirmed with minimum of Area Control Error (ACE). Differential Evolution (DE) which is a newer branch of genetic algorithms has been successfully applied in this problem. In this paper DE based PI controller has been implemented for Hydro-Thermal power plants to find out the optimal value of gain parameters for system stability. Nonlinearity has been considered in governor part of the thermal area for practical scenario. 1% step load changes have been applied to both areas simultaneously and individually to confirm its performance. Desired set of controller gain parameters (Kp, Ki) are selected based on eigenvalue and minimum value of Objective Function. All simulations are done in the MATLAB/SIMULINK environment.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"09 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127310092","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}
This work proposes an analytical model incorporating the effects of the series resistance to deduce the current-voltage characteristics for ZnO/CZTS based thin film solar cell. The evolving mathematical intractability for the inclusion of the series resistance has been resolved by using the concept of perturbation theory. The various effects utilizing the proposed model has been observed and analyzed. The model may be helpful to gain more physical insight of the CZTS based solar cells.
{"title":"Modeling of J-V characteristics of CZTS based thin film solar cells including voltage and space dependent electric field in the absorber layer","authors":"Ayesha, Kulsum, Shamara Kabir Silvi, Md. Iqbal Bahar Chowdhury","doi":"10.1109/ICDRET.2016.7421486","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421486","url":null,"abstract":"This work proposes an analytical model incorporating the effects of the series resistance to deduce the current-voltage characteristics for ZnO/CZTS based thin film solar cell. The evolving mathematical intractability for the inclusion of the series resistance has been resolved by using the concept of perturbation theory. The various effects utilizing the proposed model has been observed and analyzed. The model may be helpful to gain more physical insight of the CZTS based solar cells.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124621772","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 : 2016-02-29DOI: 10.1109/ICDRET.2016.7421508
Md. Alam Hossain Mondal, E. Bryan, C. Ringler, M. Rosegrant
This study shows an assessment of future electricity supply policies for Ethiopia. This study also examines opportunities to diversify the energy supply-mix in ways that meet the country's goals of sustainable energy system development and improved energy security, using the MARKAL energy system model. National policies, such as universal electrification, zero carbon emissions and export options are integrated in this modeling work to find the least-cost mix of technologies to meet the country's rising demand for energy given rapid socio-economic development. The model allocates renewable energy technologies (RETs) for electricity production, as their potential is relatively high in Ethiopia. Hydro, Solar PV and wind contribute significantly to improve energy security. The cumulative energy supply costs with RETs is not significantly higher than the base case to meet the policy targets. Alternative policy options show higher investment costs in the near term but have long-term benefits in terms of sustainable energy system development and access to modern sources of energy for all.
{"title":"100% electrification and renewable based Ethiopian power sector development strategies","authors":"Md. Alam Hossain Mondal, E. Bryan, C. Ringler, M. Rosegrant","doi":"10.1109/ICDRET.2016.7421508","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421508","url":null,"abstract":"This study shows an assessment of future electricity supply policies for Ethiopia. This study also examines opportunities to diversify the energy supply-mix in ways that meet the country's goals of sustainable energy system development and improved energy security, using the MARKAL energy system model. National policies, such as universal electrification, zero carbon emissions and export options are integrated in this modeling work to find the least-cost mix of technologies to meet the country's rising demand for energy given rapid socio-economic development. The model allocates renewable energy technologies (RETs) for electricity production, as their potential is relatively high in Ethiopia. Hydro, Solar PV and wind contribute significantly to improve energy security. The cumulative energy supply costs with RETs is not significantly higher than the base case to meet the policy targets. Alternative policy options show higher investment costs in the near term but have long-term benefits in terms of sustainable energy system development and access to modern sources of energy for all.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115095476","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 : 2016-02-29DOI: 10.1109/ICDRET.2016.7421500
Md Rafsunjani, E. B. Joyee, A. M. Mizanur Rahman
Solar energy, the clean and non-polluting energy source, has a great potential to supply world's energy needs. It is one of the largest renewable energy resources which is available almost everywhere. There are many fields where solar energy is used such as water & air heating, drying, distillation, cooking etc. But the efficiency of solar systems is less than conventional systems. It might be because of lack of proper technology and high cost to develop efficient system. Solar cooker is a device which is used for cooking food. It is simple, safe and convenient to cook food without consuming conventional fuel. In the previous year a parabolic type spherical solar cooker was designed and constructed. In that cooker, single axis manual tracking was used. In order to improve the efficiency of the cooker, a two axis tracking mechanism was designed and constructed and the cooker was installed on it. But, the motors that were needed for two axis tracking were expensive. So, an alternative manual tracking system was developed that could serve the purpose of facing the collector towards the sun every half an hour. Performance of the cooker has been measured. The maximum temperature inside the cooking pot was found to be 97°C, with a load of 300 g rice and 100 g dal, within 40 minutes at a radiation level of 260-394 W/m2.
{"title":"Development and testing of a two-axis tracking spherical solar cooker","authors":"Md Rafsunjani, E. B. Joyee, A. M. Mizanur Rahman","doi":"10.1109/ICDRET.2016.7421500","DOIUrl":"https://doi.org/10.1109/ICDRET.2016.7421500","url":null,"abstract":"Solar energy, the clean and non-polluting energy source, has a great potential to supply world's energy needs. It is one of the largest renewable energy resources which is available almost everywhere. There are many fields where solar energy is used such as water & air heating, drying, distillation, cooking etc. But the efficiency of solar systems is less than conventional systems. It might be because of lack of proper technology and high cost to develop efficient system. Solar cooker is a device which is used for cooking food. It is simple, safe and convenient to cook food without consuming conventional fuel. In the previous year a parabolic type spherical solar cooker was designed and constructed. In that cooker, single axis manual tracking was used. In order to improve the efficiency of the cooker, a two axis tracking mechanism was designed and constructed and the cooker was installed on it. But, the motors that were needed for two axis tracking were expensive. So, an alternative manual tracking system was developed that could serve the purpose of facing the collector towards the sun every half an hour. Performance of the cooker has been measured. The maximum temperature inside the cooking pot was found to be 97°C, with a load of 300 g rice and 100 g dal, within 40 minutes at a radiation level of 260-394 W/m2.","PeriodicalId":365312,"journal":{"name":"2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET)","volume":"215 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114041623","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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