rope and washer history has been used before, but has never cost $5 other areas have struggled...
TRANSCRIPT
Rope and WasherRope and WasherHistoryHistory Has been used before, but has never cost $5Has been used before, but has never cost $5 Other areas have struggled with issues surrounding Other areas have struggled with issues surrounding
durability – clients want it to last longerdurability – clients want it to last longer We do not think this will be an issue for IDE MyanmarWe do not think this will be an issue for IDE Myanmar
Potential IssuesPotential Issues The rope stretches – does this matter?The rope stretches – does this matter? Sun deterioration – will farmers be willing to replace Sun deterioration – will farmers be willing to replace
parts during the season?parts during the season? Can we make it foot rather than hand powered?Can we make it foot rather than hand powered? What kind of cheap wheel can we use at the top?What kind of cheap wheel can we use at the top?
Our ProcessOur Process How to make the rope and washer pump cheaper:How to make the rope and washer pump cheaper:
Could we use bamboo for the river pipe?Could we use bamboo for the river pipe?Could we use a soda bottle for the guide pulley?Could we use a soda bottle for the guide pulley?Are there found materials for the main wheel?Are there found materials for the main wheel?Can it be a “rope and rope” pump?Can it be a “rope and rope” pump?
DiaphragmDiaphragm
Plastic PumpPlastic Pump
Thermo Plastic WeldingThermo Plastic Welding Injection MoldingInjection Molding Blow MoldingBlow Molding
High tooling costHigh tooling cost Can’t protoype it from Can’t protoype it from
StanfordStanford Inner bore needs an Inner bore needs an
angleangle
Cheaper than injectionCheaper than injection Imprecise inner Imprecise inner
diameterdiameter
Can Prototype it hereCan Prototype it here Reasonable fixed Reasonable fixed
costs – high variable costs – high variable costs (labor)costs (labor)
Weight of Yellow Plastic Pump (lb) 2.8125
Approx Volume Plastic (cm3) 2240.87
Optimum Plastic Volume (cm3) 1609.64
Volume Fraction (Optimum/ Current) 0.72
Plastic $/ lb $/ original pump matl $/ optimized pump matl
ABS $1.28 $3.60 $2.59
PC $3.00 $8.44 $6.06
PP $1.02 $2.87 $2.06
PVC $3.93 $11.05 $7.93
HDPE $0.68 $1.91 $1.37
Basic EconomicsBasic EconomicsWill the pump get the farmers to the next stage?Will the pump get the farmers to the next stage?
Cost of tube well = $20Cost of tube well = $20 Cost of metal pump = $15Cost of metal pump = $15 Cost of Frame = $10Cost of Frame = $10 Acre of Land = $400Acre of Land = $400
NPV for “one-year” pumpNPV for “one-year” pump
Cost of Pump = $8Cost of Pump = $8
Profit from Crop = $100Profit from Crop = $100One CropOne Crop Two CropsTwo Crops
Cost of Capital (per month) = 10%Cost of Capital (per month) = 10%
Cost of Capital (per month) = 20%Cost of Capital (per month) = 20%
$63.30$63.30
$66.48$66.48$43.23$43.23
$109.95$109.95
Total addressable market size ~ 5 MTotal addressable market size ~ 5 M
Conservatively: 20% of market @ $43 NPVConservatively: 20% of market @ $43 NPV
Social Impact = $43 M !Social Impact = $43 M !
Water Water DisplacementDisplacement
Feasibility – will farmers use it?Feasibility – will farmers use it? User InterfaceUser Interface
Rope and Rope and WasherWasher
Flow RateFlow Rate DegradationDegradation
Diaphragm Diaphragm PumpPump
LiftLift Flow RateFlow Rate
Plastic PumpPlastic Pump Cost Targets (bamboo as substitute?)Cost Targets (bamboo as substitute?) ManufacturabilityManufacturability FramingFraming
Vulnerability – potential pitfallsVulnerability – potential pitfalls
Next StepsNext Steps
Select single design (focus)Select single design (focus) Plastic?Plastic?
Prototype in multiple configurations (go Prototype in multiple configurations (go broad one last time)broad one last time)
DeliverDeliver