Potable Water For Villa Complex

1. Term Project # 10 Potable Water For Villa Complex By Fawaz Al-Ghamdi August 9, 2005

2. OUTLINE • Introduction • Objective • VE Job Plan • Information Phase • Creative Phase • Judicial Phase • Development Phase • Implementation Phase • Q&A

3. INTORDUCTION Project Description • 6 new Villas are under construction; the owner would like to find the suitable way for getting the potable water • The designer original proposal is to install new RO system that desalinate the raw water from water well

5. OBJECTIVE • To examine the original proposal with other possible ways and recommend the most suitable system using V. E. techniques.

6. INFORMATION PHASE Consultation Records

7. INFORMATION PHASE Main Required Criteria • Provide potable water flow of 9000 gpd. • Meet the minimum potable water specification per international standard (EPA). • TDS: below 500 ppm • pH: 6.5-8.5 • Microorganism: zero

8. INFORMATION PHASE Other Features • The material to be in-kingdom • Vendor support shall be provided if needed • Spare parts to be available. • Size to be reasonable (area below 14 m sq) • Control system shall be easy. • Minimum use of hazardous chemicals

9. INFORMATION PHASE Cost Data IdeaUnit Price (SR/100 gal) RO Unit (water well) 4.34 RO Unit (SWCC) 5.51 Local Provider 1.82

10. Function Worksheet FUNCTION PHASE

11. FUNCTION PHASE Identify Present Function • What does it now do? verb noun Drain water • What must it do? verb noun Treat raw water Transfer water

12. CREATIVE PHASE Generate Ideas • Install new RO skid using the raw water from SWCC • Dig water well to search for sweet water. • Have annual contract with potable water provider. • Extend pipe from closest sweet water source. • Use raw water from the water well for the new RO unit. • Have individual RO skids for the 6 villas. • Use multistage vaporization process. • Wait for upgrading (SWCC) • Provide separate potable water piping network and raw water network. • Use solar cells to provide electricity to the new skid.

13. JUDICAL PHASE Feasibility Ranking

14. Idea Comparison

15. JUDICAL PHASE • Determining Criteria Initial Cost 1-10 Low-High cost Safety 1-10 Low- Highly Safe Magnitude of saving 1-10 Small-Large saving Continuation of service 1-10 Low-High Efforts to monitor/operate 1-10 Low-High efforts

16. Weights For Evaluation

17. Evaluation Matrix

18. Savings - Assume 10 years service life ItemTotal Cost (SR) Original: New RO with water well 299, 700 Proposed: Annual Contract with P. W. P. 65,000 ________ Total saving 234,700 % Reduction 78 % Life Cycle Cost Results DEVELOPMENT PHASE

19. VALUE STUDY SUMMARY The original design can be very well accomplished without jeopardizing basic or secondary function by install new RO units using water from well. The selected proposed method “Annual Contract with potable water provider” will: • Improve the safety • Eliminate or minimize the use of electricity and handling hazardous chemicals. • Reduces the manpower required • Eliminate installing draining facilities as there is no rejected water • Reduce the consumption of spare parts and less maintenance. • Save money (total cost and LCC) The proposed idea will meet the basic requirement and will cost mush less. The changes needed to implement the new proposal is a very minor engineering work.

20. IMPLEMENTATION PHASE How should it be implemented? The proposed case will be negotiated with local potable water providers and then the best offer shall be selected. The local providers normally transport the sweet water by using big trucks in weekly basis. What should be changed and in what sequence? No major modification work is required. Just prepare the road to the storage tank Who should do it? The selected local potable water provider will take care. How long should it take to start? Any deadline? Negotiation and selection take 20 days. Deadline: before the end of construction work of the Villas. Implementation cost, internal hours? 15 man hours. Total cost SR 300.

21. Thank you