team 4 senior design final presentation may 7, 2011
TRANSCRIPT
OutlineProject IntroductionHybrid TechnologiesOur Hydraulic SystemPrototypingTestingResultsBusiness PlanConclusions
Project IntroductionContext Efficient energy usage
Problem Inefficient vehicle use can be unavoidable in some applications
Solution Improve efficiency with the hydraulic hybrid system
Overall Project GoalValidate Hydraulic Hybrid System can increase
stop and go fuel efficiency by 40%
Benefits of a Hybrid SystemRegenerative brakingOptimal engine performanceDecreased brake maintenance
1800 2300 2800 330013.213.413.613.814.014.214.414.614.8
Power per Fuel Flow Rate vs Engine rpm
Engine Speed [rpm]
Pow
er
per
Fuel
Flo
w [
hp/
(gal/
hr)
]
Hydraulic Hybrid CartRemoved base case drive trainRetrofitted cart with hydraulic components
Hydraulic PumpHydraulic MotorAccumulatorsReservoirHydraulic Valves
Hydraulic Hybrid Retrofit CostsComponent Cost
Eaton Hydraulic Pump $246.50
Accumulators Inc. Accumulators $3286.00
7 gal. Reservoir $100.00
Haldex Hydraulic Motor $200.25
Misc. Hydraulic Valves $843.00
Misc. Hoses and Fittings $550.00
Mechanical Couplers $60.00
Pressure Fixtures $1000.00
Total $6285.75
ResultsBase Case Cart
Hydraulic Hybrid Cart
Stop and Go Fuel Economy
13.9 mpg 21.1 mpg
52.4% increase in average stop and go fuel economy
ImprovementsDifferent pump or hydraulic motor
Variable displacement motorCheck valves with lower cracking pressureDesign to eliminate minor losses
Business PlanTarget Market
Package delivery, garbage trucks, city busesIntroduction to the market
O.E.M.Retrofit is to expensive
Potential SavingsHigher gas mileage, lower maintenance costs
Business PlanFeasibility
High cost on prototypePay back period is 19 years at current gas
prices ($4.20) Longer than the life of the vehicle
$0.00 $10.00 $20.00 $30.00 $40.00 $50.00 $60.000
5
10
15
20
25
Vehicle Payback Based on Gas Price
Gas Price per Gallon ($)
Lif
eti
me o
f V
ehic
le (
years
)
ConclusionsMet our goal!
Met efficiency expectationsProved our system works
Very expensive systemLearned a lotHad fun!
AcknowledgementsMatt Mills & Kelly Dawley – Vermeer CorporationVermeer Charitable Foundation – Financial SupportNed Nielsen – Team AdvisorRen Tubergen – Industrial ConsultantPhil Jasperse – Calvin College Metal ShopCharlie Huizinga – Calvin College Physical PlantBond Fluidaire, Inc – Hydraulic hose and fittingsGreat Lakes Fluid Power – Accumulator ChargingRex Sheler – DecalsMike Harris – Donor AcquisitionJim Kuipers – Cart DonationFamily and Friends