We recently went down to Lima to fix a wind turbine at a school that
has been installed there a few years ago.
We had to install new blades on an existing turbine body that was at the
school, so we would not be able to balance the blades on the existing disc for
the turbine, a step that is usually done inside the shop where there is no wind
and we don’t have to be standing on a roof.
To make this step easier, we tried a new method for preparing the
blades. The original method included
adding weight near the center to make sure all of the blades were of the same
weight, and then adding weight to places on the disc as necessary to balance
the blades. In the new preparation, when
adding weight to make all blades the same weight, the weight was added in strategic
locations to make the center of mass of each blade in the same location. We determined the center of mass by balancing
the blades on a fulcrum along two separate lines. To add weight, holes were drilled into the
blades and the appropriate amount of lead was added before filling the holes up
with resin. This new method helped us
balance the blades at the site in half a day!
This is a big improvement to the old method.
Nosotros
fuimos a Lima para aregular una molina en una escuela que instaló hace pocas
años y rompió. Tenemos que instalar
alaves nuevas en una molina que esta en la escuela. Por esto, no podemos balancear las alaves
adentro la fabrica donde no hay viento y no necesitamos estar arriba un
techo. Para majorar el paso de
balancear, hicemos un metodo nuevo por la preperación. En la metodo original, todos tres alaves son
lo mismo peso, y si no balancean, ponemos mas peso donde necesita. Pero in el metodo nuevo, ponemos peso in
lugares especial en las alaves para hacer el centro de masa en lo mismo lugar
en cada alave. Encontramos el centro de
masa por balanceando la alave, entonces poner mas peso por haciendo huecos y
llenar con plomo antes de lenar los huecos con resin otra vez. Esto metodo nuevo nos ayuda balancear las
alaves a la escuela en solomente una media dia.
Mucho mejor de el metodo viejo.
The story behind the wind turbine at the school is also
pretty interesting. This wind turbine is
at a secondary school that is called “the best secondary school in Peru , and possibly South
America .” The school has a
book chosen as its community reading assignment, where everyone at the school
reads the book and then the classes can have discussions about it. A few years ago, the book chosen was The BoyWho Harnessed the Wind, about a boy in a remote African village who heard about
wind energy and spent a lot of time reading old books and trying to build a
wind turbine from metal scraps he could find.
A student at the school after reading this book then approached the
science teacher and suggested that students learn to build wind turbines. The teacher did just that in her classroom,
and went a step further and they found WindAid who helped put a turbine in the
school. The turbine is now a beacon for
clean energy. The science teacher made
and teaches an environmental science class and is promoting clean renewable
energy as much as she can, her main motivation being that because this is the
best school in Peru, she could be teaching the future presidents of Peru, so
educating them about clean energy and showing them why it is beneficial can
really help the policies that improve the lives of the Peruvians of
tomorrow. I thought this was an
interesting story showing how literature, science, engineering, and policy are
intertwined.
La historia
de porque la escuela tiene una molino es interesante tambien. La
molina esta en una escuela secondaria que se llama “la mejor escuela en Peru, y
posiblemente America del Sur.” La
escuela tiene un libro por la comunidad que todos leen y discutimos en las
clases. Haces unas años, el libro fue
“El Niño que Empleó la Viento,” sobre un niño de un pueblo de Africa que leó
muchas libros de ciencia y trató de contruir una molina con basura de
metal. Dispues de leyo esto libro, un
estudiante en la escuela preguntó la maestra de ciencia puede ella enseñar la
clase sobre molinas. La maestra hizo
esto, y tambien conosció a WindAid y todos podemos una molina en la escuela. La
turbina es un simbolo de energía renovable.
La maestra hizo una clase de ciencia de el medio ambiente y quere
favorecer energía limpia y renovable mucho porque esta es la mejor escuela en
Peru y posiblemente hay estudiantes que seré presidentes en el futuro. Entonces, es muy importante enseñarlos sobre
energía limpia y mostrarlos como esta energía puede mejorar las vidas de la
gente. Yo pienso esta historia es una
bien ejemplo que muestra como literatura, ciencia, ingeneria, y politica
mezclan/.
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