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Energy Harvesting

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					Soldier Systems Technology Roadmap
Power/Energy/Sustainability Workshop
September 21-22-23, 2009
Vancouver, B.C.


         ENERGY HARVESTING

              Dr. Max Donelan, CSO
Human power is an attractive energy source

                             Specific Energy

   Batteries   Lithium-Ion   0.29 MJ/kg


   Gases       Automobile    45 MJ/kg

   Foods       Fats          38 MJ/kg




                                               2
Human power is an attractive energy source




                                                         Power output, horsepower
     Power output, watts




                           Duration, minutes



                                               (Wilkie, 1960)




                                                                                    3
Human power is an attractive energy source
Limitations
 Dedicated attention
 Increase in effort




                                      4
   Overview of the State of the Art of Energy
          Harvesting Technologies
Lightning Packs
Energy Harvesting
Backpack (16 W)




       Self-winding
       Wristwatch
       (5 μW)




SRI Shoe
Energy Harvesting
Shoe (400 mW)                             5
What is currently being done in Canada




                                    6
  What is currently being done in Canada
Bionic Energy Harvester
 1.2 kg total (0.6 kg per leg)
 Comfortable
 5-7 Watts without effort
 >10 Watts with effort
 Generative Braking
 SmartGen

Power & Control Module
 intermittent & variable power input
 efficiently charge Li-ion or NiMH
                                       7
Linking the Technology to the Dismounted Soldier:
       the Importance of Energy Harvesting

   Mission duration and range
   Weight
   Logistics (shift to rechargeable batteries)
   Cost




                                                 8
Linking the Technology to the Dismounted Soldier:
       the Importance of Energy Harvesting
 Assumptions
  10 Watts during walking (Bionic Power)
  6 hours walking per day (Canadian Military)
  200 mission days per year
  $1,870 per kWh (DARPA)

 Conclusions
  60 W hr of energy produced per day
  Battery load reduced by 0.6 kg per day
  $22,000 saving per year


                                                9
Constraints: What Needs to be Considered in a
Soldier-Level Application of Energy Harvesting

 Soldier Comfort (includes device weight, resistance to
 walking, tissue wear)
 Solider Performance
 Mission Scenario (i.e. walking duration)
 Device Power Output
 Soldier Power Requirements




                                                      10
  The Vision for the Next 5 to 7 Years for
   Harvesting Technology Development
Bionic Power’s Development Path
  Bi-directional Energy Harvesting (2009)
  Human Factors Testing (early 2010)
  Ruggedization & Field Trials (2010)
  Militarization & Volume Production (2011)

Additional R&D
 Custom Generator Design
 Algorithm Development
 Integration with Clothing
 Ergonomic Benefits
                                              11
  Dr. Max Donelan, CSO
max.donelan@bionic-power.com
13

				
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posted:7/24/2012
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