Solar photovoltaic cells can help provide health care facilities in remote villages
MANY villages in developing countries
have partial or virtually no access to
electricitv because of unreliable power
supply frorn existing grids and prohibitive costs of laying conventional power-
lines to remote areas. In addition, the
fuel used to power electric generators is
expensive. Under such circumstances,
can modern health care - for which
refrigeration and sterilisation facilities
are essential parts of the infrastructure
- ever reach remote villages? Yes, say a
group of solar energy enthusiasts (Solar Today, Vol 9, No 3).
Health workers of a clinic in Bulape
- a remote village in the Kasai region of
Northern Zaire - now use solar autoclaves to sterilise medical instruments
for their operating rooms, thanks to the
efforts of Khahn Dinh, the inventor and
developer of solar autoclaves and president of Dinh Solar Co. Inc. The entire
project was funded by the Medical
Benevolent Foundation (MBF) based in
Houston, Texas, which contracted with
Dinh to develop 2 autoclaves for the Bulape clinic.
Apart from sterilising surgical
instruments, the system produces distilled water for mixing sera and medicines, and the 149 C steam generated by
the solar collectors can also be used for
cooking. The photovoltaics provide
electricity for lighting and refrigeration
of medicines - and the result is a modern solar-powered hospital in a village
which is so inaccessible that all the solar
equipment had to be carried by people on foot for 64 km.
For designing an autoclave, 16
Nippon Electric Glass evacuated tube
collectors fitted with aluminium non-
imaging reflectors were used to form a
Sun-tracking system. Two small photo-
voltaic panels power the
tracking system that follows the Sun 8 hours a
day. Along with another
60 watt photovoltaic
panel, the tracking system charges a battery
pack, the electricity
from which powers the
light and refrigeration
equipment, and operates 2 water pumps that
circulate water from the
autoclave to the evacuated tubes. Says Dinh,
"Solar thermal and photovoltaic systems
have proven,to be reliable and an inexpensive
source of energy.
Hank Watt of the
MBF says that the Bulape
project illustrates how
solar energy technologies can be used to
address critical needs in remote villages
in developing countries without incurring a high cost. Especially in areas with-
out electricity supply and regions where
electricity service is not dependable,
solar technologies should form part of a
comprehensive energy strategy.
Taking a cue from the interest generated by the solar autoclave,
California-based, SUN Utility has
designed a modular stand-alone solar
clinic using a steel-studded panelised
framing system, The panels are stationed on a cemented slab on a raised
foundation. "An average 2,000 square-foot or 186 square-metre solar clinic can
be erected in 3-5 days by a localy
trained foreman aided by 4 people. The
solar equipment is added after the
building is in its place," savs Bobby
Brooks, director of marketing for SUN Utility.
Local people helped to build and
equip the clinic and are trained to operate and maintain the equipment. The
idea, argues Brooks, is to increase the
impact of solar energy technologies in
developing countrie4s, especially for
use in areas such as health care and
disease prevention. "Accomplishing this
requires a holistic approach to village
development and integration of solar
applications with other technologies," he adds.
Les Haniasaki, president Of SUN
Utility which- is now collaborating with
West Angeles Community Development Corporation - a Los Angeles-based non-profit religious Organisation
which has ties with Africa, opines that
the solar clinic can be part of a community centre that could provide, for
instance, disinfected water, solar battery
recharging and solar food dehidration
services. Villpgers could also operate a photovoltaic cells-powered community video and communications centre, he adds.
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