WSF Walla WAlla fuel saving strategy analysis.
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Transcript of WSF Walla WAlla fuel saving strategy analysis.
KrillS y s t e m s
Morning Routine
Idling7 minutes5.1 Gallons
Dock Pushing32 minutes40.1 Gallons
Eliminate Morning Dock Pushing
40 Gal x 365 days x $3.90 =
$56,940
KrillS y s t e m s
Jack Rabbit Starts
Apply throttle gradually
1.5 Gal x 22 crossings x 365 days x
$3.90 = $46,975
Half Speed Commanded
Full Speed Commanded
KrillS y s t e m s
Dock Pushing
Dock Pushing60 Shaft RPM29 Gallons
Dock Pushing50 Shaft RPM22 Gallons
Reduce Shaft RPM while pushing
7 Gal x 22 crossings x 365 days x $3.90
= $219,220
KrillS y s t e m s
Positive Restraint System
Engine Off while Docked
29 Gal x 22 crossings x 365 days x
$3.90 = $908,193
Payoff in 3-4 months
$500,000 Cost / $908,193 x 2 Ferries
KrillS y s t e m s
Summary
Eliminate morning dock pushing $56,940Reduce Jack Rabbit Starts $46,975Reduce Shaft RPM while Docked $201,220
Total $305,135 annually per boat
With Positive Restraint System $ 1,012,108 annually per boat
With Speed reductions and schedule adjustments, even more savings are possible