Solarpunk technology

2301 readers

1 users here now

Technology for a Solar-Punk future.

Airships and hydroponic farms...

founded 2 years ago

MODERATORS

[email protected]

Exercise bike that can store 2KWh of electricity (mastodon.social)

submitted 4 months ago by [email protected] to c/[email protected]

33 comments fedilink hide all child comments

This is an industrial designed exercise bike from Lithuania that can store 2KWh of electricity generated by your own exercise.

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 0 points 4 months ago (1 children)

Rule of thumb efficiency of humans is about 25%, which is about the kJ to Calorie conversion, too

so 14kJ of energy output burns ~14,000 Calories.

[–] [email protected] 0 points 4 months ago

True, I only included kJ equivalent because some countries use kJ on nutritional panels instead of Calories. Actual conversion rate of human energy stores to usable power is, at a guess, more like

Calories * 0.25 * 0.6 * 0.8 - dt

where t is time, d is the self-discharge rate of the battery, 0.6 is the efficiency of the generator, and 0.8 is the efficiency of the battery.

So, user better eat their wheaties.