1. Team 4 By: Rhian Kogan Anthony Mistretta Akshit Kurani

2. Table of Contents  Need/Problem  Customer Needs  Design Specifications  Brainstorming Ideas  Decision Matrix  Analysis and Design  Summary/Conclusion

3. Need/Problem  We recognize the need to design a way to produce electricity off the grid in order to power a cell phone tower in Nicaragua.  We define the problem to be that Nicaragua has no energy grid. Therefore there are no possibilities for lighting, heating, etc.  Mission Statement: With our knowledge and resources, we will design a system to produce energy for the cellphone tower in a sustainable, cost effective way.

4. Customer Needs Assessment  The Nicaraguan Telecom Company is the primary customer. The villagers of Wiruca are the secondary customers.  The Telecom Company wants affordable power for the cell phone tower, while the villagers want this technological advancement for the village.

5. Design Specifications  Required Power Output: 1.2-1.5kw  Dimensions of Hut (Telecom Company)  Diesel Generator Fuel Price: $1.00/Liter  ~500-700 Potential Cell phone users  Cost/Quantity/Properties of the materials used to build the hut (telecom company)  Cost of electricity: $200/Kw Month  Battery: 572F charging/discharging

6. Brainstorming  Diesel Generator  Diesel Generator and Solar Power  Diesel Generator and Wind Turbine  Diesel Generator, Solar Power, and Wind Turbine  Remove Generator and use combination of solar and wind

7. Decision Matrix Selection CriteriaDiesel Generator Solar Power and Generator Wind Turbine with Generator Wind and Solar with Generator Operation/Insallation Cost ---- Ease of Use+++- Durability++00 Ease of Manufacture+000 Sustainability-+++ Ease of Installation+--- Maintenance Cost+000 Cost to Use-+-- Pluses5421 Minuses3223 Same0222 Net22-2 Rank1134 Continuenoyesno

9. Analysis and Design  We have decided to use the DC Generator and solar power  We found that this would be the optimal combination of cost-efficiency and sustainability.  In this situation we intend to have the generator as a backup and mainly focusing on the use of solar power.

10. Specs  Typical solar panel produces 14w per square foot  Need about 107 square feet of solar panel  The solar panel we selected is 200 watts, at a price of $577 per panel.  Since the required output is approximately 1500 watts, we will use 20 panels to help account for the hours that receive little or no sunlight.  Total Cost $11540 for panels with total 4kw

11. Turbine output0kwh PV output8,028kwh Generator output5,194kwh Generator fuel 545gal Generator hours4,050hr Dump energy0kwh

12. Why Not Others  The only other suitable for of power would be the use of a wind turbine  Cost of one wind turbine is more then the cost of our 10 solar panels  Would need a constant wind speed for best results

14. Conclusion In conclusion we found that the cell phone base station would be best suited to have the DC generator and solar panels. The cost of the wind turbine would be to excessive and unreliable.