Presentation on theme: "Alternative Energy Propulsion in Short Route Ferries Case Study: Halifax Harbour Ferries Presented By: E.Y.E. Marine Consultants."— Presentation transcript:
Alternative Energy Propulsion in Short Route Ferries Case Study: Halifax Harbour Ferries Presented By: E.Y.E. Marine Consultants
What is meant by Alternative Energy ? HybridGreen Energy Reducing Emissions But Does it Pay?
What we Are Comparing? n Diesel Engines n Main source of power from diesel fuel n No secondary sources of power Diesel Propulsion vs. Hybrid n Diesel Electric n Main source of power from Battery Bank n Secondary sources of power from diesel generator n Plug into electrical grid during stops and over night vs. Battery n Battery Powered n Main source of power from Battery Bank n No secondary sources of power n Plug into electrical grid during stops and over night
So Why bother? n Consider ferry uses 15L/Trip of fuel n Ferry operates 67 trips a day n That s 1005 Litres of Diesel Fuel per day. $1/L that s $1005/day n Amount of energy used per day 1005L x 10.4 kW-h/L = kW-h/Day n Diesel engine operates at approximately 40% efficiency = x.4 = kW-h/Day n Average rate of power from NS power is $0.12/kW-h n Total operating cost = x 0.12 = $ Total Savings of $503.30/day
Let s look at Batteries Lead Acid (AGM) Lithium Ion Nominal Voltage2.0V3.70V Energy Density20 Wh/kg163 Wh/kg Cycle Life (50% DOD) ~3000 (8 yrs.) ~300,000 Charge CapacityC/52C Pack Maintenance $0/ Life time Installation Cost $20 /kW-h$1600 /kW-h RecyclableYes
30 Year Cost Comparison 1 Generator2 Generators
The Physical Restrictions Actual Battery Size Needed: AGM = 207,500 kgor 53.3 m^3 Li-Ion = 16,973 kgor 8.7 m^3 Li-Ion Only Solution
The Good and Bad n 30 yr. Savings of $ 790, n Emission Savings of CO2 = Tons/yr Nox = 5.96 Tons/yr n Less exposed to fluctuations in fuel prices n More exposed to fluctuations in electricity prices. n Still very high installation Costs n Additional costs for charging infrastructure required at dockside. The GoodThe Bad
From Here? n Further analysis required into ferry operating loads. n Further study into optimal generator size and quantity. n Discuss possible safety issues with regard to stored battery capacity. n Look for better battery technology to improve energy densities. n Determine Charging infrastructure requirement and cost at dockside. n Collect firm data with regards to purchasing bulk energy and off peak recharging.
Conclusion n Technology is viable today with modest savings. n Further savings possible with development of emission credits. n Government incentives to promote and off set large installation costs. n Further reduction in price with bulk purchases of power and off peak recharging. n Satisfaction of saving emissions and helping environment.
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