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This session describes the development of a new, low cost, sustainable light source for poor villagers in developing countries called the Twig Light. The light makes use of a compact thermoelectric generator sandwiched and providing a thermal bridge between two pieces of ten-centimeter aluminum channel approximately fifteen centimeters in length. The lower section is cooled by sitting it in a small amount of water, while the upper section serves as a combustion chamber in which small pieces of wood or other combustible materials are burned. The subsequent temperature difference across the thermoelectric generator results in enough power to light a bank of LEDs sufficient to illuminate a small room. The technology was distributed in the rural Ghanaian village of Domeabra in the summer of 2009, and the performance will be evaluated during a return visit in 2010.
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Brad Rogers Mark Henderson Michael Pugliese
College of Technology and Innovation Arizona State University at the Polytechnic Campus
The results are:
1. New products for the BoP to improve lives
2. New business ventures to build village economies
3. Life-changing educational experiences for students.
GlobalResolve improves the world by building partnerships to create technological and economically sustainable solutions for villages in the developing world.
The GlobalResolve Method
• Gelfuel production system • Efficient stoves for
Gelfuel • Jatropha Curcas
partnerships • Low cost water filters • Fire into Ice project • Orange juice
pasteurization system • Developed at request of Chief
• Classes provide “traditional” education and incubate and develop ideas
• Undergraduate students are engaged in design for the BoP market
• Courses Include: 1. Traditional Engineering capstone sequence (6 credits) 2. Three semester interdisciplinary capstone sequence (6-9
credits) 3. Village Energy Systems
• One semester, 3 credits • Seniors, Graduate students • 75% Engineering students • Format is Problem Based Learning • Class requirements:
– Class project for BoP market • Chosen by Instructor
– Individual project for BoP market • Chosen by each student based on their interest and talents
• Graduate Student (Michael Pugliese) decided to address the problem of clean, safe and affordable lighting
• Solution was to utilize a Thermoelectric Generator to power a bank of LEDs.
• Upper and lower chambers are aluminum channel
• Lower chamber sits in pan of water
• Supported by NCIIA and manufactured in ASU labs
• Successful products require field testing in a well understood environment
• Domeabra is a typical rural African village, and is serving as a Village Laboratory
• Villagers preferred to use leftover coals from cooking fires to power the unit
• The increased surface temperatures from the hot coals led to burnout of the TEGs. – This was not observed in the limited testing with
twig combustion • Initial student designed prototypes from the
capstone suffered the same fate – Thermal control is a key
• Combustion based lighting is expensive and unpleasant, but is often all that is available.
• Competing “clean” technologies include PV coupled with rechargeable batteries and direct battery devices. – Solar PV systems are typically more than $30.
• D Light claims a $10 product will be out soon
• Twig Light material costs are in the range of $10. – Advantage of Twig Light – no need to wait for the Sun to
recharge
• Attending the Lighting Africa conference in Kenya for more careful assessment
• Engineering Capstone team developing next generation for field testing – Power unit
• Thermal Management has been primary design constraint
– Application unit • LED arrays • Cell phone charging • High frequency sound for mosquito control (?)
• Capstone students are graduating soon • New team of students applying for Edson
entrepreneurial grant to develop business • Product design efforts have been initiated
• Several villages, with Domeabra being the largest
• About 30 square miles • More than 10,000 people • Typical income is less than $2 per day, usually
less than $1 • Most villager’s income is primarily obtained
from small farms
• Village appraisal meetings provide a forum to establish trust.
• Villagers use products under realistic conditions and report on performance.
• Nana Frempong Afaokwa: – Graduate of the Massachusetts
Institute of Technology in Mechanical Engineering
– Started and operated a successful manufacturing business in New York for 25 years
– Returned to Africa as Paramount Chief of the Domeabra Traditional Area in the Asante region of Ghana
• Our partners in Domeabra and at KNUST provide continuous feedback to us.
• Product improvements are made in Arizona as needed, and further tested in Domeabra. – Principles of Design for Extreme Affordability are always
followed – All products will be manufactured in Africa to the extent
possible
• When the products are shown to be reliable and useful in the African environment, supply chains are identified and the product is offered in the greater market
• GlobalResolve is having an impact • More than 100 students have been involved in
GlobalResolve projects • 18 ASU students have worked on the ground
in Africa on GlobalResolve projects • We are just beginning!
• Water capture in Gamoa-Dago • Twig Light optimization, marketing, supply chain (KITE) • Cell Phone charging attachment for twig light • Gelfuel demonstration at Kumasi elementary school • Fire into Ice project • Jatropha Curcas as a Village Energy Resource
– Extraction – Diesel based multifunction platforms – Cooking – Industrial fuel for Suame Magazine
• Developments in Uganda • Certificate Program at ASU • Global Innovation capstone at ASU
• Seniors in Engineering at the Polytechnic Campus – Students given opportunity to work on BoP
problem – Gelfuel production facility – Improved Gelfuel stoves – Development of Twig Light
• Interdisciplinary, International, Intercultural approach to reduction of extreme poverty through social entrepreneurship
• Travel, learn and identify problems. • Form global teams to address problems
– Students – University Faculty – Villagers and Chiefs – NGOs – Government organizations
• We ask the questions: • What are the problems? • Who can solve the problem? • Who can implement the solution? • What funding sources are available?
• We create alliances for expertise, connections and funding • Universities, Companies, Foundations
• We involve partners on the ground • Villagers, Companies, NGOs, Local university students
KITE
Villages