Strathclyde Alternative Lighting Initiative

1
Strathclyde Alternative Lighting Initiative 5th
Year EME Group Project 2006
Contact Details
Iain Cochrane iain.cochrane_at_strath.ac.uk Hamis
h Hogg hamish.hogg_at_strath.ac.uk David Paton
david.paton_at_strath.ac.uk Douglas Ramsay
douglas.ramsay_at_strath.ac.uk Calum Stewart
calum.stewart_at_strath.ac. uk
SALi Team Members Calum Stewart, David Paton,
Douglas Ramsay Hamish Hogg, Iain Cochrane
FUTURE WORK Our project will continue through
Douglas Ramsay and Hamish Hogg working to install
these solutions in developing countries. This
project has been linked to the University of
Malawis Faculty of Engineering. Hamish will
spend this summer in Malawi working on further
development of the project with the eventual aim
of implementation. Doug will be working in Nepal
developing a pedal powered battery charger and
Tuki LED lamp through an Engineers Without
Borders UK project in conjunction with the
Kathmandu Centre for Renewable Energy (CRE).
Project Aim To develop an alternative and
sustainable means of providing safe lighting in
the rural homes in off-grid regions of Malawi.

• Malawi is a landlocked country in Southern Africa
  bordering Tanzania, Zambia and Mozambique,
  and has a population of over 10.4 million people
  of which 87 live in rural areas.
• Electricity is only readily available in the
  urban areas, where it is a common source of
  lighting. Nationally, only 4.8 percent of the
  population light their homes with electricity.
• Unfortunately, conventional grid electrification
  in rural areas is too costly due to the
  expenditure associated with the expansion of the
  grid.
• As such liquid kerosene in hurricane and pressure
  lamps is the most common method used for lighting
  in Malawi About 92 percent of the population use
  this method. However, light from kerosene lamps
  is poor and inefficient. Reading with a kerosene
  lamp besides being unhealthy is a difficult.
  Every year in developing nations, acute
  respiratory infections such as influenza and
  pneumonia kill nearly two million children
• It is the aim of this project to provide an
  alternative lighting source to kerosene lamps for
  the people of Malawi

Visit our web-site and update yourself on our
progress this summer http//project.eee.strath.a
c.uk/sali
2
Product Description
PRODUCT PERFORMANCE Savonius Wind Turbine Cut
in speed 1m/s (0.5W produced very )
- Typical output 3.5W _at_ 4m/s Max expected
output 7.5W _at_ 10m/s Pedal Power -
Typical Output (Steady pace) 50W Generator
Dual Rotor 3 phase Axial Flux Permanent Magnet
Generator Power Electronics Full Wave
Rectification and Reverse Polarisation
Diode Battery 12V 18Ahr Europa Sealed Lead
Acid Battery Constant Current Source 3 x LED
Driver Circuits Solid State Light Source 3 x
3W Luxeon LEDs Optics 2 x 600 Optical
Diffuser and 1 x 450 Wide Lens Collimator
PRODUCT OVERVIEW Solid-state lighting is the
lighting of the Third Millennium. The technology
eclipses conventional lighting, permits
independent power production and dramatically
lowers energy requirements. The durability,
reliability and extended lifetime of these
sources make them an appropriate source for
lighting in both the developed and developing
world. The SALi system produces electrical power
from two mechanical drivers a vertical axis
wind turbine and an adapted bicycle - connected
to the same axial flux permanent magnet
generator. Each drive mechanism can be easily
engaged/disengaged as required by the user. Power
electronics are used to convert the 3 phase power
generated and condition the electricity to allow
the charging of a sealed lead acid battery. The
lighting solution consists of three luminaires
two of which provide diffuse general illumination
and a third which provides a focused beam
suitable for reading. The light sources used are
3 of 3W Luxeons LEDs which require a constant
current driver circuitry to control their
operation. It is anticipated that such a
solution could be installed in a rural dwelling
and be able to illuminate the interior
sufficiently for both reading and performance of
general tasks for up to to 10 hours per day
Far Left - Generator Efficiency versus wind
speed Middle Power produced from axial flux
generator with rotational speed Right Working
plane surface lux plot
http//project.eee.strath.ac.uk/sali
FOR MORE INFORMATION VISIT