Operations Information -
- 120m Passenger Ferry
- 4x MTU Engines
- Built by INCAT
- Average speed 35 kts.
- Typical run: UK to Channel Islands (70 – 80 nm.)
- Daily operation in Summer. Weekly in Winter.
- Typical vessel fuel consumption: 1,700 lph.
- Average trip time: 15 hours.
- Average fuel consumed per trip: 25,500 liters.
- Even a cost reduction of only 2% would be significant for commercial vessels.
- Time / schedule is an important constraint.
- Reduction in throttle by 40 rpm
- Loss of time: Less than 5 minutes on each leg of the trip. 20 minutes per day.
- Reduction in fuel consumed: 240 lph. 4 engines X 60 lph each.
- Fuel saved per trip: 3,600 litres.
- Fuel saved Summer Schedule: 108,000 litres / month
- Fuel saved Winter Schedule: 14,400 Litres / month
- Cost in Fuel: $1.00 per litre.
Monthly Fuel Savings Summer: $108,000
Monthly Fuel Savings Winter: $14,400Annual Fuel Savings-
3 Months Summer Schedule: $324,000
9 Months Summer Schedule: $129,600Total Fuel Savings = $453,600
- Additional labor in summer: 10 hours per crew member
- Additional labor in winter: 1.3 hours per crew member
- Effect on passengers’ time: Negligible.
- Effect on operations’ time: Efficiency improved due to better matching of operations to tides. 15m in places during each trip.
- System Costs: $60,000 INSTALLED, Weymouth, England.
- Annual Fuel Savings: $453,600 (cost of system X 7.55 in one year)
- System Payback: 6 weeks.
- Increased labour cost (crew of 15, $25 per hour): $14,800 per year from the longer schedule.
NET TOTAL SYSTEM SAVINGS, FIRST YEAR: $378,800
