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Design of a Rainwater Harvesting Unit

ENGINEERING 1P03 - DESIGN PROJECT. Design of a Rainwater Harvesting Unit. Kevin Cryan Brad Gauthier Arjun Kanianthra Chetan Mistry. HARVESTING A FRESHWATER FUTURE. Presentation Layout. BACKGROUND INFORMATION STORAGE TANK SIZING TOTAL COST MATERIALS MAINTENANCE RECOMMENDATIONS

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Design of a Rainwater Harvesting Unit

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  1. ENGINEERING 1P03 - DESIGN PROJECT Design of a Rainwater Harvesting Unit Kevin Cryan Brad Gauthier Arjun Kanianthra Chetan Mistry HARVESTING A FRESHWATER FUTURE

  2. Presentation Layout BACKGROUND INFORMATION STORAGE TANK SIZING TOTAL COST MATERIALS MAINTENANCE RECOMMENDATIONS CODE OF ETHICS CONCLUSION

  3. Background Information • Nilgiris District of Southern India requires a solution to their water crisis • Government has enforced a law that requires rainwater harvesting units to be installed on the rooftops • There are a total of 42 homes in the village • 32 homes have a rooftop that is 60m2 (type A), and 10 have a rooftop that is 100m2 (type B) • Our task is to present a design that maximizes the amount of water harvested (an efficiency of at least 90%), while trying to minimize cost

  4. Storage Tank Sizing • Microsoft Excel was used to calculate the most efficient storage tank size • 2 different sized tanks were required for the 2 different sized houses • 3 equations were used: Ci = min (Si-1 + APiz, Di) Qi = max (Si-1 + APiz, Di – V – Ci, 0) Si = Si-1 + APiz, Di – Qi – Ci ) • We found the most efficient storage tank sizes to be 7800L (type A) and 5600L (type B)

  5. Total Cost • We were given a budget of 840,000 Rupees • Total costs for our project came to 849,000 Rupees • However, there are many ways we could reduce our costs: - train the citizens of the village to install and maintain their own units - enlist volunteers to install the units - construct the tanks on site (lower shipping costs) - fundraising events

  6. Materials • The storage tanks are to be built from ferrocement for the following reasons: - extreme strength - will not burn, rot, or rust - “near zero” maintenance is required • The down piping will be constructed from polyvinylchloride (PVC) piping for the following reasons: - excellent corrosion and chemical resistance - excellent flow characteristics - light weight - accommodates expansion and contraction very well

  7. Maintenance • Very little maintenance is required • General inspection of all unit components must be done every 2 weeks and a thorough inspection must be done every 6 weeks • Any problems or concerns should be reported immediately • Absolutely no makeshift components are to be installed

  8. Recommendations • One sufficient rainfall must occur before any water is consumed • Water within the storage tank must be tested regularly for contamination • All contamination cases must be reported immediately • All water must be sanitized (through boiling or the use of chlorine iodine) before consumption

  9. Code of Ethics • As engineering students we should guide ourselves through all tasks with the code of ethics in mind • We have many duties to fulfill, including: - Duty to Society (we must do all we can to design the most appropriate solution for the citizen’s of the village) - Duty to Colleagues (we must work together as a group to obtain the best results possible) • By adhering to the code of ethics, we stand a much better chance at being successful

  10. Conclusion • An engineer must explore possibilities beyond the completion of a project • An engineer must strive to design a safer, more efficient and more effective solution • We could look into developing lighter, stronger and cheaper materials to construct our units • We should work hand-in-hand with the citizens of the village to ensure they get the water they need • We should take every step possible to ensure that we make an improvement to this village’s standard of living

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