1. PowerDock Progress Report #2 Mike MacGillivray Trevor Hennigar Devon Balodis Eric Giacomin Ian Spindler

2. Environmental Issues Pending information from Environment Canada Pending information from Environment Canada We are considering 5 regions for our project We are considering 5 regions for our project Some areas are environmentally protected e.g. Blomidon Some areas are environmentally protected e.g. Blomidon

3. Location

4. Location Least disruption of local activity with maximum tidal range Least disruption of local activity with maximum tidal range Halls Harbour has year round lobster industry Halls Harbour has year round lobster industry Environment issues with protected areas (Blomidon) Environment issues with protected areas (Blomidon) Minas Basin is a logical choice Minas Basin is a logical choice Only has tourist attractions which are easy areas to evade Only has tourist attractions which are easy areas to evade Minas Basin is our choice Minas Basin is our choice Distance to shore = 100m Distance to shore = 100m Distance from shore to grid = 500m Distance from shore to grid = 500m

5. Power Transmission Bury power lines in ocean floor Bury power lines in ocean floor Dug in by excavator on a barge Dug in by excavator on a barge Work would be completed during low tide Work would be completed during low tide Cost of burial $1476.38- 1640.42 per meter ($1558.40 average) Cost of burial $1476.38- 1640.42 per meter ($1558.40 average) Approximately 9 meters per day (11 days in total) Approximately 9 meters per day (11 days in total)

6. Power Transmission Cost of Three Phase power lines (including poles): $26.55 Cost of Three Phase power lines (including poles): $26.55 Lines needed: 3 Lines needed: 3 Cost of poles: $90 Cost of poles: $90 Number of poles per 100 m: 3 Number of poles per 100 m: 3 Total Cost of lines and burial: $1558.40/m*100m + 3*(100m+500m)*$26.55 - 3*$90 = $203,260.00 Total Cost of lines and burial: $1558.40/m*100m + 3*(100m+500m)*$26.55 - 3*$90 = $203,260.00

7. Grid Connection We are currently gathering information from Nova Scotia Power about current standards for connecting to the power grid. We are currently gathering information from Nova Scotia Power about current standards for connecting to the power grid.

8. Construction Costs Need to drive five piles Need to drive five piles $25-40 per foot $25-40 per foot Length of Pile – 82.02 ft = 25 m Length of Pile – 82.02 ft = 25 m Total feet: 410.1 Total feet: 410.1 ($25+$40)/2(per foot)*410.1(feet)= $13328.25 ($25+$40)/2(per foot)*410.1(feet)= $13328.25

9. Generator Choices The right choice of generator had to be made between an AC generator and a DC generator The right choice of generator had to be made between an AC generator and a DC generator An AC generator was chosen for several key reasons An AC generator was chosen for several key reasons The conventional power grid runs on ACThe conventional power grid runs on AC Some AC generators are able to establish their own magnetic field with a DC exciterSome AC generators are able to establish their own magnetic field with a DC exciter Large AC generators are much easier to get then large DC generatorsLarge AC generators are much easier to get then large DC generators

10. Generator Size Aiming to power a small community of approximately 200 homes Aiming to power a small community of approximately 200 homes The average home requires between 10 – 20 KW of power for comfortable living The average home requires between 10 – 20 KW of power for comfortable living Community would need 2000 – 4000 KW of power Community would need 2000 – 4000 KW of power

11. Torque Requirements Typical generators run between 900 and 2400 r.p.m. Typical generators run between 900 and 2400 r.p.m. Due to the speed of tides, slow speed generators are needed Due to the speed of tides, slow speed generators are needed The torque required to turn a 2000KW, 900 r.p.m. generator was determined to be 2163.02 kg-m The torque required to turn a 2000KW, 900 r.p.m. generator was determined to be 2163.02 kg-m This torque would be greatly increased when the rotation is slowed down to match the speed of the tide This torque would be greatly increased when the rotation is slowed down to match the speed of the tide An acceptable shaft size must be determined before a total platform weight can be decided. An acceptable shaft size must be determined before a total platform weight can be decided.

12. Generator Pricing Relationship between cost and power output is approximately linear Relationship between cost and power output is approximately linear Large AC generators are plentiful, both new and used Large AC generators are plentiful, both new and used Used generator prices ranged from $40 000 for 1000KW to $80 000 for 1986KW Used generator prices ranged from $40 000 for 1000KW to $80 000 for 1986KW These prices give a unit price of $80 per KW of generator output These prices give a unit price of $80 per KW of generator output The cost of a generator would range from $160 000 for 2000KW to $320 000 for a 4000KW The cost of a generator would range from $160 000 for 2000KW to $320 000 for a 4000KW

13. Platform Pricing 4 barges required (120*128*8 ft.) $75,000 U.S./barge (2nd hand) $300,000 U.S. total ($347,880.00 CDN) Estimated cost per square ft: $75,000/128*120ft = $4.88/ft Estimated cost per square ft: $75,000/128*120ft = $4.88/ft Below Left & Right: Two angles of an available barge.

14. Prototype Currently working on deck construction Currently working on deck construction Working on the uprights in Machine shop Working on the uprights in Machine shop Laminate Styrofoam with metal Laminate Styrofoam with metal Styrofoam float 4 inches thick Styrofoam float 4 inches thick Use metal to attach the platform to the gear box Use metal to attach the platform to the gear box

15. Prototype

16. Conclusion Finish construction of prototype Finish construction of prototype Await responses from NS Power and Environment Canada Await responses from NS Power and Environment Canada Investigate the impact of installation on the local area? Investigate the impact of installation on the local area? Total power output? Total power output? Finalize costs for the full scale model Finalize costs for the full scale model Explore other areas around the world where we could use the system Explore other areas around the world where we could use the system Investigate economical feasibility of the project Investigate economical feasibility of the project

17. QUESTIONS?