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Objective
As part of the Humboldt State University Parras Summer Program, We are students interested in technologies that are beneficial to people and the environment. There are many people in the world who are dependant on technologies that are either too expensive or harmful too the environment such as expensive electric bills or plastic bottles for drinking water. In Parras de la Fuente we have been given an amazing opportunity to learn about and hopefully implament appropriate alternatives to these technologies. In 2007 a team of students were asked by Josè Leandro Hernàndez to implement a PV system for his store... technologies that ... Research demonstrates that solar energy is an ideal source for low-temperature [1]
Project Criteria
Here is a table of criteria that in our minds define an appropriate technology for the construction of the refrigerator. Competing solutions can be rated on how well they meet each of the following criteria. Then those rating can be multiplied by the criterion weights. The solution with the highest score is accepted to be the most appropriate.
Criteria | Weight (0-10 highest) |
---|---|
Buy back time (economically viable) | 9 |
Environmental Impact | 9 |
Safety(for the consumer) | 8 |
Cost(of construction and of final product) | 7 |
Efficiency | 7 |
Simplicity of use | 7 |
Functionality | 6 |
Utilizes local materials | 5 |
Planning
Grant Writing
We submitted a grant request to The International Journal for Service Learning in Engineering (IJSLE) for the sum of $1000 USD. The grant discussed the learning possibilities of this project as well as the impact it would have on the community. The grant was submitted on July 4th, 2008. Here is a link to our project outline via ServiceBook: http://www.servicebook.org/content/view/287/112?project_id=143
Collection of Materials
- Broken Refrigerator
The refrigerator was the first part of the refrigerator that we sought out. We obtained it from Gerardo Delgado Ayala at his small, home run refrigerator repair shop at Calle Guerrero #13. The refrigerator had the compressor and other electronics removed. We hope to make use of it for the housing for our project.
- Welding Equipment
Antonio Pachicano 42-2-07-82
Jaime Pachicano 42-2-01-46
Budget
Projected Budget
Part | Quanity | Estimated Cost (Dollar) | Estimated Total Cost (Dollar) |
---|---|---|---|
Refrigerant (Ammonia) | x | $x | x |
Hydrogen Pressurization | 1 | $x | x |
Tubing (Copper) | 50 Feet | $x | x |
Reflector Material | 20 Square Feet | $5 | $100 |
Reflector Housing | 1 | Free | Free |
Used Refrigerator Housing | 1 | $40 | $40 |
Welding and Soldering work | 1 | $120 | $120 |
Stop Valves | 4 | x | x |
High Pressure Gauges | 4 | x | x |
1" Discharge Pipe | 2 | x | x |
Pipe Mounts | 50 | $.50 | $25 |
Housing | 1 | $50 | $50 |
Interpretive Materials | 12 | $2 | $24 |
Steel Wool | 4 | $5 | $20 |
Community Demo Signage | 1 | $30 | $30 |
Community Demo Food | 1 | $120 | $120 |
Total | $1125 |
Actual Budget
Part | Date Purchased | Cost (Peso) |
---|---|---|
Broken Refrigerator | July 13, 2008 | $100 |
Bamboo | July 21, 2008 | Free |
Cord | July 21, 2008 | $18 |
Construction
Testing
Problems
Problem X
Solutions
Solution X
Implementation
See Also
References
- ↑ Klein, S. Reindl, D: "Solar Refrigeration", page S26. ASHRAE Journal. 2005.
- ↑ Klein, S. Reindl, D: "Solar Refrigeration", page S29. ASHRAE Journal. 2005.