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Big Eddy Power Project Situation Update
- Dr. G. Alan Hepburn, P.Eng
Byron Ostrom, Roy Reed January 17, 2011
Council: Good evening ladies and gentlemen. Just so you know, you’re looking downstream
- here. The dam will be just off the bottom edge of
Big Eddy Power Project Situation Update Dr. G. Alan Hepburn, - - PDF document
Big Eddy Power Project Situation Update Dr. G. Alan Hepburn, P.Eng Byron Ostrom, Roy Reed January 17, 2011 1 Council: Good evening ladies and gentlemen. Just so you know, youre looking downstream here. The dam will be just off the
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– Continuous full power
for 2-3 months
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Here’s how it would work: At the end of the off-peak period, you have the headpond full, and are passing whatever river flow is available above the committed residual value through the turbine. As you enter the 8 hour peak rate period, you don’t change anything, but calculate how long it will take to empty the pond with the turbine at full power. When that time arrives, you open the turbine to full power, so that you reach the end of the peak period having just emptied the headpond. To avoid the penalty for violating your environmental promises, the gates will be lowered during this time under computer control to maintain the promised residual flow. At the end of the peak rate period, the turbine will be turned off to allow the dam to re-fill and get the head back to its most profitable level. As the headpond level rises, the gates will be raised to maintain that same minimum flow. For the remainder of the 16 hour off-peak period, the turbine flow will again be set to pass whatever flow is available through the turbine, earning dollars at the off-peak rate. This brings you back to the start of the cycle. There are alternatives that result in less dramatic variations in flow For example, stretch the drain and refill periods out to span the full 8 and 16 hour periods but that is 6% less profitable. The difference gets even bigger in lower flow months. The residual flow stays at that minimum number, 24/7. It’s actually a pretty neat idea. The whole thing’s controlled by computer. It’s all pre-programmed. The operator looks in
around who can do anything about it.
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0.7 km
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– After the Madawaska tragedy, there is no doubt about that – Have asked for definitive document – referred to the president of OWA, who has not yet responded – Don’t Xeneca know themselves?
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– Mark Holmes, Xeneca
– But it now looks like this applies to the construction phase only – The exclusion area for public safety will clearly stretch much further
– It is implicit in the peaking type of operation for which the facility appears to be designed – It is the conclusion of the most obvious DBA
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– Petawawa resident’s expectations appear to be threatened by the Big Eddy Dam project, and – Some lands owned by the town of Petawawa will be degraded by this project and – the EA process is biased towards proponent success.
– Negotiate the most favourable compensation for the residents of Petawawa; and – Ensure that appropriate restrictions are placed on the developer to safeguard the residents’ interests
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