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# Practivistas Chiapas windbelt ASE

Project Page in Progress This page is a project page in progress. Please refrain from making edits unless you are a member of the project team, but feel free to make comments using the discussion tab. Check back for the finished version on August 12, 2010.

## Introduction/Introducción

### Wind Energy

Energy from the wind is not a new technology, windmills have been around for centuries. Some authors believe to have discovered remains of stone windmills in Egypt, near Alexandria, that are believed to be 3000 years old. However, no evidence has been found that proves that the Egyptians had the necessary knowledge to harness the energy of the wind.[1] Wind energy is now being merely reintroduced to a society that has forgotten about it. The majority of the electricity used in the United States comes from fossil fuels [2]; a non-renewable source of energy that supplies over 85% of our energy demands[3]. However, Wind energy is being used more often in recent decades because it is a renewable resource which is non polluting and never ending. Wind power can be used to generate electricity through the use of wind turbines and turbine free wind generators.

## Background on the client

Otros Mundos Chiapas is a non-profit, sustainability organization based in the state of Chiapas in southen Mexico. They avoid political and industrial ties to serve the people of Mexico without associated external pressures. Otros Mundos wants to help the world in terms of social, political, environmental and economic issues. They work with various other non-profit groups including Amigos de la Tierra International, COMDA, La COMPA, International Rivers etc.[4] They address issues like clean water, justice, sexism, and mental health. They do hands-on community outreach to help the many impoverished indigenous people throughout Chiapas. See the Otros Mundos website for more information.

### Background of the Students

Background of A.S.E. Project: The Who-What-Where-When

Anna Ferguson
• Anna Ferguson is originally from central Illinois and is now living in Arcata California. She has a two year old daughter named Korazón, and recently graduated from HSU with a degree in Spanish Education. Anna has a fabulous group of friends and family she calls her 'tribe' who help her continue her journey in life with advice, love, and hands-on care. She has many interests and hobbies which include photography, traveling, reading, gardening, swimming/exercise, raising little Kora, and among other things living life to the fullest. While spending time in San Cristóbol de las Casas, Anna has realized that appropriate technology is a fascinating field of study that she would like to explore much more. She hopes to study and learn as much as she can in the future, and at present she is working on the wind belt project with her team.
Shane Brabant
• Shane is a Humboldt County local, sophomore at HSU, and hopes to become either a Natural Resources Planning and Interpretation major or an Environmental Engineering major. After living in Humboldt for most of his life Shane has been exposed to a wide variety of interesting and intelligent people that have continually inspired and encouraged him throughout his education. After breaking his hand last semester and having to withdraw from HSU, his support group was more important than ever. Thankfully for Team A.S.E., Shane has healed after eight months of being in a cast, completed the Spring Semester at HSU, and was able to join the 'Parras in Chiapas' program for this amazing experience.
Enrique Diaz
• Enrique Diaz is a Chilean native residing in northern California. He is in his second year at HSU studying Environmental Engineering and Spanish Education. He and his wife Brianna live in McKinleyville and she also attends HSU and is in her second year. Enrique is looking forward to building a greenhouse out of 1x2' and the simple square connection pieces. Enrique traveled to San Cristóbol de las Casas with his wife and three cats for the 'Parras in Chiapas' Program where they have had the opportunity to visit the surrounding areas as well as Guatemala with some other students from HSU, and enjoyed it completely.

Team A.S.E., Anna-Shane-Enrique, has been commissioned by Otros Mundos to build a Windbelt. Based off of Shawn Frayne’s design dubbed the Humdinger Windbelt, we will be creating a working, low cost, and small device to be used in the field to power small lights, radios and possibly a cell phone or even a laptop. Our team will be creating multiple Windbelts of different design in order to design and create the best possible working Windbelt for use here in Chiapas and around the world! Currently, we have begun construction of a Windbelt designed by USD’s D-Lab based off of Shawn’s 'Humdinger'. The D-Lab design is made of a PVC body instead of wood with little other alterations to the Humdinger design. Currently, our prototype creates adequate electricity to power a light emitting diode (LED).

A Windbelt works off of something known as aeroelastic flutter, or the vibration of a membrane pulled taught between two points. This phenomenon was first witnessed when the Tacoma Narrows Bridge was destroyed in 1940 by high winds.

The flutter of the membrane, in this case Mylar coated taffeta, creates an iris of motion that is used to oscillate magnets in between magnetic wire coils in order to create a charge. This relatively small amount of energy can hopefully power lights in poor countries with little or no cost to the household. Originally designed by Shawn Frayne to power lights in rural areas of Haiti, the Windbelt design is now being considered to power small sensors in large buildings air ducts in order to regulate the temperature of the building without the use of batteries that will need to be replaced. Currently, the Windbelt technology is new and not widely used. We hope that the Windbelt will become a more feasible generator in the next couple of years after the technology becomes wider known and is augmented to function with greater efficiency. Our hope is that a series of Windbelts can someday be used in unison to power larger things like computers and to charge larger batteries like that of a car or possibly a defibrillator for field medics.

## Objective

The objective of the project is to design, build and implement multiple versions of the windbelt generator for Otros Mundos. Our initial goal was to power Otros Mundos' telecommunication devices in the field, using wind energy. However, the prototype developed did not generate sufficient energy to power these telecommunication systems. The refined goal for this work is to inspire interested people and to provide them the information necessary to create their own Windbelts.

## Literature Review

The purpose of the literature review, is to provide background information on relevant topics of the design project. The literature review includes the client criteria, windbelt trademark, aeroelastic flutter, windbelt models, electromagnetic force, climate, wind energy, assembly instructions, and materials.

### Client Criteria

In order to make clear, translucent decisions with regard to what Otros Mundos needs, Team A.S.E. will be utilizing the following client criteria:

Client Criteria Constraint

## Cost

Total Material Costs

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## Other Possible Windbelt Designs

• During the past five weeks Team ASE has built many different types of windbelts all very similar to the Humdinger created by Sean Frayne. During this time numerous other possible windbelt designs were discussed but never constructed. I would like to share a couple of our hypothesized designs.
• TOWER:
Tower of windbelts
• One possible windbelt generator design could look like a tower of windbelts connected in series to produce the necessary energy to power larger electronic devices such as laptops or stereos. This design would work in the same way as the Humdinger with the only difference being the windbelts would be stacked on top of each other in a tower, with multiple windbelts using the same coils to generate electricity. This disign is similar to Humdingers Windcell Panel, but made in our own Mexico style.
• PLANE:
• Another idea that Team ASE played around with was to use the windbelt technology in a human powered small scale plane or glider. We would attach a windbelt to a wing and swing the glider/plane around to generate wind and electricity. This would work to generate power in the absence of wind.
• KITE:
Windbelt Kite
Windbelt Kite
• Based off of the same idea as the Plane windbelt, a Kite windbelt could be constructed. Using the energy of the wind to lift the Kite one could angle the kite and dive to the left and the right in succession making the kite drop and rize rapidly. This rapid ascent and decent would generate high wind speeds and would create a lot of flutter and hopefully a lot of energy