"Renewable Energy Electricity Generation"
Senqu River (Summer 2005) Senqu River (Winter 2005) Electricity from Water… Continuing research on rural electrification in the Kingdom of Lesotho Fourth Year Project – Michaelmas Presentation MATT ZEDLER (23rd November 2005) (Under Dr. Jim Platts) Lesotho Facts Maseru (Winter 2005) § Developing southern African country > Formerly colony of the United Kingdom (Until 1966) > Population of nearly two million Basotho > 86% of population involved in subsistence agriculture > 45% of population unemployed with 49% below poverty line > Nearly 1/3 of population infected with HIV § Energy resources & usage > Parastatal Lesotho Electric Company (LEC) > Lesotho Highlands Water Project (LHWP) > 6th lowest energy consumption per capita in world > Costs exorbitantly high to connect to grid Water Power / Previous Research > BETHEL VILLAGE, Phamong > 240-300 residents > Bethel Business & Community Centre (BBCDC) > Clinic, mission church, and two shops > Summer visit § Survey of local energy options § Flow measurements at several Clinic Medical Supplies (Winter 2005) locations > Winter visit § Installation of flow measurement equipment § Energy survey § Educational interaction Interviewing Mme. Ratsebe (Winter 2005) Water Power / Previous Research > MIT D-Lab class § Prototyped Darrieus turbine using locally available materials § Tested turbine in towing tank > Alex Norman’s 4th Year Project § Developed Pelton wheel MIT Drawing & turbine for Lisuland, China Turbine Prototype > Monica Lewis’s 4th Year Project § Investigated small scale wind power in developing countries Alex Norman’s Pelton Wheel We can get the work from the flowing fluid… …but where does the ELECTRICITY come in? Project Goals Rotating Shaft Work Electrical Power (DC (25-500 rpm) ? or AC, consistent) > Develop a gear box, generator, and electrical conversion system that has the following specifications: § Provides safe, reliable power § Takes in two different ranges of speeds § Can be produced in rural regions with locally available parts* § Operates using basic principles § Could be used for educational purposes § Is robust, compact, lightweight, and efficient § Could be used as an economic good suitable for development of small, organic enterprises MUST INVOLVE LOCAL COMMUNITY AND BE APPROPRIATE *NB: This specification is the main reason for avoiding photovoltaic energy sources. Current Work > Maintaining local contacts § Determining available resources and skills § Seeking feedback on specific goals of project > Researching similar projects Welder being § Wind, water turbines and electrification projects used to cut steel § Permanent magnet generators vs. alternators; belts vs. chains; direct-drive vs. geared… > Design challenges § Specific goals of project – education vs. durability § Lack of availability of bearings, magnets, resin, custom gears, and electrical components § Possible dual fluid application (Wind and water) …looking for assistance on electrical and transmission decisions… Students returning from school (Winter 2005) Kea Leboha! Question / Discussion Time Any suggestions should be directed to Matt Zedler at email@example.com.