Wearable Power, the all time favorite of the wearable technology community, keeps on inspiring people to find ways of making use of the many Watt’s a human body produces at any time of the day.
Estimates go as high as about 130 Watt’s potentially usable to transform from kinetic energy into electrical energy. The highest kinetic power sources on a human body are the footfalls clocking in about 67W followed by arm motion at about 60W. At the end of the scale is lifting a finger that generates only about 10mW.
While searching about parasitic power harvesting from body motion I cam across an interesting concept design from Nick Reddall, the HuMo or Human Dynamo Jacket.
The HuMo jacket proposes to harvest kinetic energy generated from the natural arm swings of the wearer when wandering through the world and transforming the kinetic energy into electrical energy to light up LEDs providing enhanced visibility for the wearer or just for style or fun purpose.
Transforming the theoretical power generated by body movement efficiently without interfering with the wear comfort of clothing remains a challenge. Most experiments around parasitic power harvesting from the human body either result in low electrical power conversion due to wearability concerns or effect negatively the wear comfort when higher power conversion is achieved.
For now – there is still a lot of room for innovation to solve the dilemma of the kinetic power conversation ratio vs. wear comfort.