PowerDockPowerDockProgress Report #2Progress Report #2

Mike MacGillivrayMike MacGillivrayTrevor HennigarTrevor HennigarDevon BalodisDevon BalodisEric GiacominEric GiacominIan Spindler Ian Spindler

Environmental IssuesEnvironmental Issues

Pending information from Environment CanadaPending information from Environment Canada We are considering 5 regions for our projectWe are considering 5 regions for our project Some areas are environmentally protected Some areas are environmentally protected

e.g. Blomidone.g. Blomidon

LocationLocation

LocationLocation Least disruption of local activity with Least disruption of local activity with

maximum tidal rangemaximum tidal range Halls Harbour has year round lobster Halls Harbour has year round lobster

industryindustry Environment issues with protected areas Environment issues with protected areas

(Blomidon)(Blomidon) Minas Basin is a logical choiceMinas Basin is a logical choice Only has tourist attractions which are easy Only has tourist attractions which are easy

areas to evadeareas to evade Minas Basin is our choice Minas Basin is our choice Distance to shore = 100mDistance to shore = 100m Distance from shore to grid = 500mDistance from shore to grid = 500m

Power TransmissionPower Transmission Bury power lines in ocean Bury power lines in ocean

floorfloor Dug in by excavator on a Dug in by excavator on a

bargebarge Work would be completed Work would be completed

during low tideduring low tide Cost of burial $1476.38-Cost of burial $1476.38-

1640.42 per meter 1640.42 per meter ($1558.40 average)($1558.40 average)

Approximately 9 meters per Approximately 9 meters per day (11 days in total)day (11 days in total)

Power TransmissionPower Transmission Cost of Three Phase power lines Cost of Three Phase power lines

(including poles): $26.55(including poles): $26.55 Lines needed: 3Lines needed: 3 Cost of poles: $90Cost of poles: $90 Number of poles per 100 m: 3Number of poles per 100 m: 3 Total Cost of lines and burial: Total Cost of lines and burial:

$1558.40/m*100m + $1558.40/m*100m + 3*(100m+500m)*$26.55 - 3*(100m+500m)*$26.55 - 3*$90 = $203,260.003*$90 = $203,260.00

Grid ConnectionGrid Connection We are currently gathering information We are currently gathering information

from Nova Scotia Power about current from Nova Scotia Power about current standards for connecting to the power standards for connecting to the power grid.grid.

Construction CostsConstruction Costs

Need to drive five Need to drive five pilespiles

$25-40 per foot$25-40 per foot Length of Pile – Length of Pile –

82.02 ft = 25 m82.02 ft = 25 m Total feet: 410.1 Total feet: 410.1 ($25+$40)/2(per ($25+$40)/2(per

foot)*410.1(feet)=foot)*410.1(feet)=$13328.25$13328.25

Generator ChoicesGenerator Choices The right choice of The right choice of

generator had to be made generator had to be made between an AC generator between an AC generator and a DC generatorand a DC generator

An AC generator was An AC generator was chosen for several key chosen for several key reasonsreasons• The conventional power The conventional power

grid runs on ACgrid runs on AC• Some AC generators are Some AC generators are

able to establish their own able to establish their own magnetic field with a DC magnetic field with a DC exciterexciter

• Large AC generators are Large AC generators are much easier to get then much easier to get then large DC generatorslarge DC generators

Generator SizeGenerator Size

Aiming to power a Aiming to power a small community of small community of approximately 200 approximately 200 homeshomes

The average home The average home requires between 10 – requires between 10 – 20 KW of power for 20 KW of power for comfortable livingcomfortable living

Community would Community would need 2000 – 4000 KW need 2000 – 4000 KW of powerof power

Torque RequirementsTorque Requirements Typical generators run between 900 and 2400 Typical generators run between 900 and 2400

r.p.m. r.p.m. Due to the speed of tides, slow speed generators Due to the speed of tides, slow speed generators

are neededare needed The torque required to turn a 2000KW, 900 r.p.m. The torque required to turn a 2000KW, 900 r.p.m.

generator was determined to be 2163.02 kg-mgenerator was determined to be 2163.02 kg-m This torque would be greatly increased when the This torque would be greatly increased when the

rotation is slowed down to match the speed of the rotation is slowed down to match the speed of the tidetide

An acceptable shaft size must be determined An acceptable shaft size must be determined before a total platform weight can be decided.before a total platform weight can be decided.

Generator PricingGenerator Pricing Relationship between cost and power Relationship between cost and power

output is approximately linearoutput is approximately linear Large AC generators are plentiful, both Large AC generators are plentiful, both

new and usednew and used Used generator prices ranged from $40 Used generator prices ranged from $40

000 for 1000KW to $80 000 for 1986KW 000 for 1000KW to $80 000 for 1986KW These prices give a unit price of $80 per These prices give a unit price of $80 per

KW of generator outputKW of generator output The cost of a generator would range from The cost of a generator would range from

$160 000 for 2000KW to $320 000 for a $160 000 for 2000KW to $320 000 for a 4000KW4000KW

Platform PricingPlatform 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: Estimated cost per square ft:

$75,000/128*120ft = $4.88/ft$75,000/128*120ft = $4.88/ft

Below Left & Right: Two angles of an available barge.

PrototypePrototype

Currently working on deck constructionCurrently working on deck construction Working on the uprights in Machine shopWorking on the uprights in Machine shop Laminate Styrofoam with metalLaminate Styrofoam with metal Styrofoam float 4 inches thickStyrofoam float 4 inches thick Use metal to attach the platform to the gear Use metal to attach the platform to the gear

boxbox

PrototypePrototype

ConclusionConclusion Finish construction of Finish construction of

prototypeprototype Await responses from NS Await responses from NS

Power and Environment Power and Environment CanadaCanada

Investigate the impact of Investigate the impact of installation on the local area?installation on the local area?

Total power output?Total power output? Finalize costs for the full scale Finalize costs for the full scale

modelmodel Explore other areas around the Explore other areas around the

world where we could use the world where we could use the systemsystem

Investigate economical Investigate economical feasibility of the projectfeasibility of the project

QUESTIONS?QUESTIONS?