Samuel Lakeou - Academia.edu (original) (raw)
Papers by Samuel Lakeou
Scientific African, Mar 1, 2024
Electric Power Components and Systems, 2011
Abstract This article introduces a probabilistic particle movement in conventional particle swarm... more Abstract This article introduces a probabilistic particle movement in conventional particle swarm optimization wherein each particle position is updated either based on pbest or gbest, but not as a resultant of pbest and gbest as in conventional particle swarm optimization. The proposed concept is termed as probabilistic particle swarm optimization. The proposed concept is first verified on a set of standard test functions and compared with existing methods. The probabilistic particle swarm optimization technique is then employed for the feedback controller design of a boost type DC-DC converter. Computed results supported by experimental evidence at different operating points of the DC-DC converter system confirm the effectiveness of the new algorithm.
The work describes a solar powered micro-inverter and battery operated hybrid electrical energy s... more The work describes a solar powered micro-inverter and battery operated hybrid electrical energy source implemented at the University of the District of Columbia's Experimental Farm. The goal of the project is to provide round the clock electricity for maintaining specified temperature in a series of green houses as well as supply irrigation water to a variety of crop systems including sustainable agriculture projects comprising hydroponic, aquaponics, specialty and ethnic vegetables and fruits production and urban forestry. hydroponic crop systems at the Farm. The advantages and shortcomings presented by a micro-inverter based system, when combined with the traditional battery storage/inverter are analyzed. The system is proposed to be a model for a self-powered, standalone small scale hybrid system, ideal for semirural and rural farming.
Applied Physics Letters, 1996
International Journal of Engineering Research in Africa
This research explores the techno-economic potential for a predominantly renewable electricity-ba... more This research explores the techno-economic potential for a predominantly renewable electricity-based microgrid serving Ethiopian residential real estate buildings, the fastest-growing sector. A stand-alone photovoltaic (PV)-Battery energy storage system (BESS)-Genset (PV-BESS-Genset) connected microgrid model, utilizing measured solar irradiation data, real-time manufacturer data for technology components, case study area daily energy consumption data, and a bottom-up approach to model demand response. The modeled system results in a $ 0.298 cost of energy (COE), reduces the 2000.34 kg/yr amount of CO2 released into the environment, and yields 1,470 kWh/yr of excess energy, which indicates that the system is the most cost-effective, ecologically friendly, and reliable, respectively. Moreover, solar PV production potential is very high onsite and can meet the onsite demand with a renewable fraction of 99.3%. However, BESS and generator production potential is substantial and provides...
The paper describes the design and implementation of a mobile Solar Power Delivery System for use... more The paper describes the design and implementation of a mobile Solar Power Delivery System for use in rural areas. The work is undertaken jointly by the University of the District of Columbia in Washington, DC, USA, (UDC) and Bahir Dar University (BDU) in Ethiopia. This UDC-BDU partnership was initially supported by a Seed Grant from the US Embassy in Ethiopia. The design introduces novel features providing versatility and mobility and has beneficial applications to the rural populations whose need in potable water and water for small scale irrigation is very acute. The design is performed with the help of graduate and undergraduate students at BDU and has contributed to the infusion renewable energy in the engineering curriculum.
2007 Annual Conference & Exposition Proceedings
Proton Exchange Membrane (PEM) fuel cell is a device that converts electrochemical energy to elec... more Proton Exchange Membrane (PEM) fuel cell is a device that converts electrochemical energy to electricity at high efficiency without combustion. The PEM fuel cell consists of an electrolyte membrane sandwiched between two electrodes (the anode-negative electrode and the cathode-the positive electrode). The electrodes are made of porous carbon plates which are laced with a catalyst_ a substance that accelerates chemical reactions. Hydrogen and oxygen are commonly used as the fuel and oxidant. At the anode, the hydrogen gas combines with the catalyst which causes the hydrogen to split into hydrogen ions and electrons. The electrons flow through an external circuit from the anode to the cathode producing an electrical current. The hydrogen ions flow through the membrane, and at the cathode, oxygen and hydrogen ions combine to form water, which flows out of the cell. The returning used electrons at the cathode side are recycled back to the anode, generating continuous electricity. Fuel cells can provide clean and efficient energy; low temperature operation; safe and quiet performance; ease of operation and low maintenance. In this study an experimental prototype fuel cell system is designed for undergraduate studies. In the presentation, an overview of fuel cells is provided starting with the fundamental principles, the different types, the key components, the basics of PEM fuel cell operation, the diverse benefits and the considerations of various applications.
2019 IEEE 2nd International Conference on Renewable Energy and Power Engineering (REPE)
Solar energy is the energy generated by harnessing the power of solar radiation. In order to extr... more Solar energy is the energy generated by harnessing the power of solar radiation. In order to extract maximum energy from the sun, the solar panel installed must be positioned as much as possible perpendicular to the sun’s incident radiation. However, due to the continuous change in relative angle of the sun with reference to earth and other constraints, for instance; shadow of long buildings and trees around the PV plant, reduces the yield power delivered by solar panel is reduced considerably. To reduce the loss and to increase the efficiency of the photovoltaic panel solar trackers are best alternative. Various types of tracking systems were developed. However, most of them were done with the emphasis of the unceasing change of relative angle of the sun. In this research work, inspired by a previous collaboration with the University of the District of Columbia, in Washington DC, USA, we, at the faculty of Electrical and Computer Engineering at Bahir Dar University, Ethiopia, proposed a novel multi axis tracking system aimed at reducing shadow effect and improve PV panel efficiency by extending solar extraction daily hour in small scaled system for the selected rural locations.
2009 Annual Conference & Exposition Proceedings
The paper chronicles the process which led to the success of a renewable energy project based on ... more The paper chronicles the process which led to the success of a renewable energy project based on a hybrid solar and wind power system. The project is based in Farsi Senkele rural community in Ambo, Ethiopia. The initial fact-finding mission conducted by the university, including its dealings with local governmental and nongovernmental organizations as well as local universities and colleges are highlighted with emphasis on the encountered challenges. Details of the proposed technical design of the renewable power source for pumping water from a shallow well is presented. The logistical considerations, including the signing of required memorandum of understanding (MOU) with a local organization, the acquisition of private funding and material support and equipment transportation and other aspects are described. The benefits brought to the students who participated in the realization of the project are also emphasized. The project is promoted as an ideal model for the prospect of sustained university sponsored projects in developing countries.
2010 Annual Conference & Exposition Proceedings
is a professor of Electrical and Computer Engineering at the University of the District of Columb... more is a professor of Electrical and Computer Engineering at the University of the District of Columbia. During her career, Dr. Ososanya has worked for private industry as a circuit development engineer and as a software engineer, in addition to her academic activities. She received her education in the United Kingdom, where she achieved her Ph.D. in Electrical Engineering from the University of Bradford in 1985. She was also a Visiting Professor at Michigan Technological University for five years, and a faculty member at Tennessee Technological University for 7 years prior to arriving at the University of the District of Columbia in the Fall of 2001. Dr. Ososanya is interested in new applications for VLSI, MEMS, parallel processing, and pipeline architecture. In recent years, she has worked with colleagues to apply these technologies to such environmental problems as watershed monitoring and management, and Telemetry applications.
Applications Samuel Lakeou, PhD (1, 2) Mengesha Mamo, PhD (3), Gudeta Gelalcha BSc (4) (1) Depart... more Applications Samuel Lakeou, PhD (1, 2) Mengesha Mamo, PhD (3), Gudeta Gelalcha BSc (4) (1) Department of Electrical and Computer Engineering University of the District of Columbia, Washington, DC, USA (2) Director, Center of Excellence for Renewable Energy University of the District of Columbia, Washington, DC, USA (3) Associate Professor, Department of Electrical and Computer Engineering, Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia (4) Executive Director, Hope2020, Addis Ababa, Ethiopia
The paper describes the realization of a standalone, PV/Wind powered water delivery system, under... more The paper describes the realization of a standalone, PV/Wind powered water delivery system, undertaken jointly by the University of the District of Columbia in Washington, DC, USA and Bahir Dar University in Ethiopia. This UDC-BDU partnership was supported by a Seed Grant from the US Embassy in Ethiopia. The project is a model that can be duplicated in various rural communities which need ambulant water delivery. The proposed water delivery includes potable water to rural communities and cattle, as well as water for small scale drip-irrigation. The design introduces novel features providing versatility and mobility to the system. The paper describes also the academic merit of the project by highlighting its integration in the BDU’s undergraduate and graduate power engineering curricula.
This paper describes the initiation and implementation of Computer Aided Engineering at the depar... more This paper describes the initiation and implementation of Computer Aided Engineering at the department of electrical engineering of the University of the District of Columbia, using state-of-the-art APOLLO workstations networked with low cost personnal computers. A novel approach of networking allowing an effective use of a highly sophisticated CAE software is presented. Design file transfer procedures are outlined and discussed. The limitations and advantages of the network are also highlighted and future expansion schemes are sketched.
A large number of projects including analysis and design of renewable energy sources have been re... more A large number of projects including analysis and design of renewable energy sources have been reported by several institutions. Particularly, solar and wind energy based power sources have resulted in a variety of interesting projects, including automatic control of solar tracking photovoltaic panels and solar wind combination sources for various applications. The current work illustrates the design of a computer controlled system for monitoring the power generated by a renewable energy power system under a recorded local weather condition. The monitoring system includes a web-based Labview power measurement apparatus as well as a complete wireless weather station. The power system consists of a solar tracking photovoltaic (PV) system and a Whisper H80 wind turbine. The power system generates up to 2KW of electrical power. The remote data monitoring system provides a round the clock information on the generated power, the wind speed, humidity, rain water level, outside temperature ...
The original workplan for the first year of the project includes the following: establishment of ... more The original workplan for the first year of the project includes the following: establishment of a pilot superconductivity application laboratory at UDC to support the research component of the project; research on the source of electrical noise in High Tc superconducting films in order to optimize the film microstructure and lower the NEP; and lay the foundation of an academic support for exposing UDC students to the theory and application of High Tc superconductivity. Attached to this status report are abstracts and the course description for Introduction to Applications of Superconductivity.
Samuel Lakeou, Ph.D. (1, 2), Esther Ososanya, Ph.D., Atoum Laith, BSEE, Carlos Quiroga, BSEE , Nu... more Samuel Lakeou, Ph.D. (1, 2), Esther Ososanya, Ph.D., Atoum Laith, BSEE, Carlos Quiroga, BSEE , Nunez Jessica, BSEE, Samuel Diarra , Senior, Missi Sogbohossou, BSEE Brice Koukoua, and Raju Shrestha, MSEE Professor and Chairman, Department of Electrical and Computer Engineering Director, Center of Excellence for Renewable Energy (3) Professor, Department of Electrical and Computer Engineering University of the District of Columbia, Washington, DC, USA
Samuel Lakeou, PhD (1, 2) Mengesha Mamo, PhD (3), Gudeta Gelalcha BSc (4) (1) Department of Elect... more Samuel Lakeou, PhD (1, 2) Mengesha Mamo, PhD (3), Gudeta Gelalcha BSc (4) (1) Department of Electrical and Computer Engineering University of the District of Columbia, Washington, DC, USA (2) Director, Center of Excellence for Renewable Energy University of the District of Columbia, Washington, DC, USA (3) Associate Professor, Department of Electrical and Computer Engineering, Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia (4) Executive Director, Hope2020, Addis Ababa, Ethiopia
Scientific African, Mar 1, 2024
Electric Power Components and Systems, 2011
Abstract This article introduces a probabilistic particle movement in conventional particle swarm... more Abstract This article introduces a probabilistic particle movement in conventional particle swarm optimization wherein each particle position is updated either based on pbest or gbest, but not as a resultant of pbest and gbest as in conventional particle swarm optimization. The proposed concept is termed as probabilistic particle swarm optimization. The proposed concept is first verified on a set of standard test functions and compared with existing methods. The probabilistic particle swarm optimization technique is then employed for the feedback controller design of a boost type DC-DC converter. Computed results supported by experimental evidence at different operating points of the DC-DC converter system confirm the effectiveness of the new algorithm.
The work describes a solar powered micro-inverter and battery operated hybrid electrical energy s... more The work describes a solar powered micro-inverter and battery operated hybrid electrical energy source implemented at the University of the District of Columbia's Experimental Farm. The goal of the project is to provide round the clock electricity for maintaining specified temperature in a series of green houses as well as supply irrigation water to a variety of crop systems including sustainable agriculture projects comprising hydroponic, aquaponics, specialty and ethnic vegetables and fruits production and urban forestry. hydroponic crop systems at the Farm. The advantages and shortcomings presented by a micro-inverter based system, when combined with the traditional battery storage/inverter are analyzed. The system is proposed to be a model for a self-powered, standalone small scale hybrid system, ideal for semirural and rural farming.
Applied Physics Letters, 1996
International Journal of Engineering Research in Africa
This research explores the techno-economic potential for a predominantly renewable electricity-ba... more This research explores the techno-economic potential for a predominantly renewable electricity-based microgrid serving Ethiopian residential real estate buildings, the fastest-growing sector. A stand-alone photovoltaic (PV)-Battery energy storage system (BESS)-Genset (PV-BESS-Genset) connected microgrid model, utilizing measured solar irradiation data, real-time manufacturer data for technology components, case study area daily energy consumption data, and a bottom-up approach to model demand response. The modeled system results in a $ 0.298 cost of energy (COE), reduces the 2000.34 kg/yr amount of CO2 released into the environment, and yields 1,470 kWh/yr of excess energy, which indicates that the system is the most cost-effective, ecologically friendly, and reliable, respectively. Moreover, solar PV production potential is very high onsite and can meet the onsite demand with a renewable fraction of 99.3%. However, BESS and generator production potential is substantial and provides...
The paper describes the design and implementation of a mobile Solar Power Delivery System for use... more The paper describes the design and implementation of a mobile Solar Power Delivery System for use in rural areas. The work is undertaken jointly by the University of the District of Columbia in Washington, DC, USA, (UDC) and Bahir Dar University (BDU) in Ethiopia. This UDC-BDU partnership was initially supported by a Seed Grant from the US Embassy in Ethiopia. The design introduces novel features providing versatility and mobility and has beneficial applications to the rural populations whose need in potable water and water for small scale irrigation is very acute. The design is performed with the help of graduate and undergraduate students at BDU and has contributed to the infusion renewable energy in the engineering curriculum.
2007 Annual Conference & Exposition Proceedings
Proton Exchange Membrane (PEM) fuel cell is a device that converts electrochemical energy to elec... more Proton Exchange Membrane (PEM) fuel cell is a device that converts electrochemical energy to electricity at high efficiency without combustion. The PEM fuel cell consists of an electrolyte membrane sandwiched between two electrodes (the anode-negative electrode and the cathode-the positive electrode). The electrodes are made of porous carbon plates which are laced with a catalyst_ a substance that accelerates chemical reactions. Hydrogen and oxygen are commonly used as the fuel and oxidant. At the anode, the hydrogen gas combines with the catalyst which causes the hydrogen to split into hydrogen ions and electrons. The electrons flow through an external circuit from the anode to the cathode producing an electrical current. The hydrogen ions flow through the membrane, and at the cathode, oxygen and hydrogen ions combine to form water, which flows out of the cell. The returning used electrons at the cathode side are recycled back to the anode, generating continuous electricity. Fuel cells can provide clean and efficient energy; low temperature operation; safe and quiet performance; ease of operation and low maintenance. In this study an experimental prototype fuel cell system is designed for undergraduate studies. In the presentation, an overview of fuel cells is provided starting with the fundamental principles, the different types, the key components, the basics of PEM fuel cell operation, the diverse benefits and the considerations of various applications.
2019 IEEE 2nd International Conference on Renewable Energy and Power Engineering (REPE)
Solar energy is the energy generated by harnessing the power of solar radiation. In order to extr... more Solar energy is the energy generated by harnessing the power of solar radiation. In order to extract maximum energy from the sun, the solar panel installed must be positioned as much as possible perpendicular to the sun’s incident radiation. However, due to the continuous change in relative angle of the sun with reference to earth and other constraints, for instance; shadow of long buildings and trees around the PV plant, reduces the yield power delivered by solar panel is reduced considerably. To reduce the loss and to increase the efficiency of the photovoltaic panel solar trackers are best alternative. Various types of tracking systems were developed. However, most of them were done with the emphasis of the unceasing change of relative angle of the sun. In this research work, inspired by a previous collaboration with the University of the District of Columbia, in Washington DC, USA, we, at the faculty of Electrical and Computer Engineering at Bahir Dar University, Ethiopia, proposed a novel multi axis tracking system aimed at reducing shadow effect and improve PV panel efficiency by extending solar extraction daily hour in small scaled system for the selected rural locations.
2009 Annual Conference & Exposition Proceedings
The paper chronicles the process which led to the success of a renewable energy project based on ... more The paper chronicles the process which led to the success of a renewable energy project based on a hybrid solar and wind power system. The project is based in Farsi Senkele rural community in Ambo, Ethiopia. The initial fact-finding mission conducted by the university, including its dealings with local governmental and nongovernmental organizations as well as local universities and colleges are highlighted with emphasis on the encountered challenges. Details of the proposed technical design of the renewable power source for pumping water from a shallow well is presented. The logistical considerations, including the signing of required memorandum of understanding (MOU) with a local organization, the acquisition of private funding and material support and equipment transportation and other aspects are described. The benefits brought to the students who participated in the realization of the project are also emphasized. The project is promoted as an ideal model for the prospect of sustained university sponsored projects in developing countries.
2010 Annual Conference & Exposition Proceedings
is a professor of Electrical and Computer Engineering at the University of the District of Columb... more is a professor of Electrical and Computer Engineering at the University of the District of Columbia. During her career, Dr. Ososanya has worked for private industry as a circuit development engineer and as a software engineer, in addition to her academic activities. She received her education in the United Kingdom, where she achieved her Ph.D. in Electrical Engineering from the University of Bradford in 1985. She was also a Visiting Professor at Michigan Technological University for five years, and a faculty member at Tennessee Technological University for 7 years prior to arriving at the University of the District of Columbia in the Fall of 2001. Dr. Ososanya is interested in new applications for VLSI, MEMS, parallel processing, and pipeline architecture. In recent years, she has worked with colleagues to apply these technologies to such environmental problems as watershed monitoring and management, and Telemetry applications.
Applications Samuel Lakeou, PhD (1, 2) Mengesha Mamo, PhD (3), Gudeta Gelalcha BSc (4) (1) Depart... more Applications Samuel Lakeou, PhD (1, 2) Mengesha Mamo, PhD (3), Gudeta Gelalcha BSc (4) (1) Department of Electrical and Computer Engineering University of the District of Columbia, Washington, DC, USA (2) Director, Center of Excellence for Renewable Energy University of the District of Columbia, Washington, DC, USA (3) Associate Professor, Department of Electrical and Computer Engineering, Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia (4) Executive Director, Hope2020, Addis Ababa, Ethiopia
The paper describes the realization of a standalone, PV/Wind powered water delivery system, under... more The paper describes the realization of a standalone, PV/Wind powered water delivery system, undertaken jointly by the University of the District of Columbia in Washington, DC, USA and Bahir Dar University in Ethiopia. This UDC-BDU partnership was supported by a Seed Grant from the US Embassy in Ethiopia. The project is a model that can be duplicated in various rural communities which need ambulant water delivery. The proposed water delivery includes potable water to rural communities and cattle, as well as water for small scale drip-irrigation. The design introduces novel features providing versatility and mobility to the system. The paper describes also the academic merit of the project by highlighting its integration in the BDU’s undergraduate and graduate power engineering curricula.
This paper describes the initiation and implementation of Computer Aided Engineering at the depar... more This paper describes the initiation and implementation of Computer Aided Engineering at the department of electrical engineering of the University of the District of Columbia, using state-of-the-art APOLLO workstations networked with low cost personnal computers. A novel approach of networking allowing an effective use of a highly sophisticated CAE software is presented. Design file transfer procedures are outlined and discussed. The limitations and advantages of the network are also highlighted and future expansion schemes are sketched.
A large number of projects including analysis and design of renewable energy sources have been re... more A large number of projects including analysis and design of renewable energy sources have been reported by several institutions. Particularly, solar and wind energy based power sources have resulted in a variety of interesting projects, including automatic control of solar tracking photovoltaic panels and solar wind combination sources for various applications. The current work illustrates the design of a computer controlled system for monitoring the power generated by a renewable energy power system under a recorded local weather condition. The monitoring system includes a web-based Labview power measurement apparatus as well as a complete wireless weather station. The power system consists of a solar tracking photovoltaic (PV) system and a Whisper H80 wind turbine. The power system generates up to 2KW of electrical power. The remote data monitoring system provides a round the clock information on the generated power, the wind speed, humidity, rain water level, outside temperature ...
The original workplan for the first year of the project includes the following: establishment of ... more The original workplan for the first year of the project includes the following: establishment of a pilot superconductivity application laboratory at UDC to support the research component of the project; research on the source of electrical noise in High Tc superconducting films in order to optimize the film microstructure and lower the NEP; and lay the foundation of an academic support for exposing UDC students to the theory and application of High Tc superconductivity. Attached to this status report are abstracts and the course description for Introduction to Applications of Superconductivity.
Samuel Lakeou, Ph.D. (1, 2), Esther Ososanya, Ph.D., Atoum Laith, BSEE, Carlos Quiroga, BSEE , Nu... more Samuel Lakeou, Ph.D. (1, 2), Esther Ososanya, Ph.D., Atoum Laith, BSEE, Carlos Quiroga, BSEE , Nunez Jessica, BSEE, Samuel Diarra , Senior, Missi Sogbohossou, BSEE Brice Koukoua, and Raju Shrestha, MSEE Professor and Chairman, Department of Electrical and Computer Engineering Director, Center of Excellence for Renewable Energy (3) Professor, Department of Electrical and Computer Engineering University of the District of Columbia, Washington, DC, USA
Samuel Lakeou, PhD (1, 2) Mengesha Mamo, PhD (3), Gudeta Gelalcha BSc (4) (1) Department of Elect... more Samuel Lakeou, PhD (1, 2) Mengesha Mamo, PhD (3), Gudeta Gelalcha BSc (4) (1) Department of Electrical and Computer Engineering University of the District of Columbia, Washington, DC, USA (2) Director, Center of Excellence for Renewable Energy University of the District of Columbia, Washington, DC, USA (3) Associate Professor, Department of Electrical and Computer Engineering, Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia (4) Executive Director, Hope2020, Addis Ababa, Ethiopia