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Objective

As part of the Humboldt State University Parras Summer Program, we are students interested in creating technologies that benefit people and the environment. 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

[2]

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.

Collection of Materials

The refrigerator.
  • 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
Welding Equipment July 20, 2008 $1500

Construction

Testing

Problems

Problem X

Solutions

Solution X

Implementation

See Also

References

  1. Klein, S. Reindl, D: "Solar Refrigeration", page S26. ASHRAE Journal. 2005.
  2. Klein, S. Reindl, D: "Solar Refrigeration", page S29. ASHRAE Journal. 2005.

External Links

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