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IrishAyes

(6,151 posts)
Fri Nov 13, 2015, 07:24 PM Nov 2015

Engineer Types - What Say You About This?

Sounds too good to be true but I want to be wrong. Not about to consider buying one even when they are(?) available in US until I see independent verification.

Meanwhile maybe some of you folks could tell me what you think so far at this stage of development.


http://samuel-warde.com/2015/11/60-minutes-on-this-bicycle-can-power-your-home-for-24-hours-video/



5 replies = new reply since forum marked as read
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Engineer Types - What Say You About This? (Original Post) IrishAyes Nov 2015 OP
Some were claiming to debunk this yesterday 99th_Monkey Nov 2015 #1
It can power whose home? Wilms Nov 2015 #2
Bad idea Travis_0004 Nov 2015 #3
Yup, converting calories to watts on a bicycle edgineered Nov 2015 #4
Here are some human power output over time graphs Fumesucker Nov 2015 #5
 

99th_Monkey

(19,326 posts)
1. Some were claiming to debunk this yesterday
Fri Nov 13, 2015, 07:26 PM
Nov 2015

saying one-hour of bike only gets one-hour of energy, IF you're in 1st world;
that this might be true in some hut somewhere in 3rd world for 2 light bulbs.

her's the link: http://www.democraticunderground.com/?com=view_post&forum=1127&pid=93587

 

Wilms

(26,795 posts)
2. It can power whose home?
Fri Nov 13, 2015, 07:28 PM
Nov 2015

It all depends on what the power use is of the home in question.

And what does it cost?

How about fixing a generator and battery charger to a yard sale bike?

 

Travis_0004

(5,417 posts)
3. Bad idea
Fri Nov 13, 2015, 07:41 PM
Nov 2015

I'm not an enginner, but I am a cyclist. I can put down 150-175 watts of power (verified with a power meter on my bike that is very accurate. I bike try to bike 1500-2000 miles a year, so I am used to it and in decent shape.

I can generate 6,000 watts a month. (or 6KWH).(a bit more than an hour, 7 days a week) I have low usage at home, but I still use at least 100 KWH a month. Probably 150-175 now that fall is here. So this would only generate a small part of my electricity needs.

The savings is about 10 cents an hour. I'm not sure that will motivate many people.

Also, there is no such thing as free energy. Energy has to come from somewhere. I get home, and I might eat a steak, and potato, and sometimes even have some ice cream at night, so in my case, I have the energy to burn. I have the luxury of being able to afford my meals, and I can eat what I want (sometimes in excess)

In developing nations, there are people who do not have an unlimited food budget. If they cycle for 1 hour, they need to replace those calories. They are replacing an electricity bill with a food bill.

I enjoy cycling, I look forward to it, and when it rains, I get upset. I would assume that somebody who just finished a 10-12 hour day farming or in a factory, or other tough job does not want to go home and pedal for an hour. I absolutely would to give my family the best life possible. I would even sign up for one of these bikes, but I don't know if its ideal. A solar panel that provides 200 watts of power a day could be provided cheaper, I would think, and it goes further to really improving peoples standard of living.

Also, as for me, I want to be outside, enjoy nature, ride with friends, and maybe even piss off a few motorist. I don't want to ride my bike inside, and .10 cents an hour in savings is not going to convince me. I could see this being cost effective in a gym where it might get a few hours of use a day, but I don't think the electricity generation is worth the extra cost over a standard bike.

edgineered

(2,101 posts)
4. Yup, converting calories to watts on a bicycle
Fri Nov 13, 2015, 08:05 PM
Nov 2015

A 150 pound rider at 10 mph for an hour burns 408 calories. That comes out to .47 watts per second, or about 170 watts in an hour. (just like you said!)

Convert it to electric and store it, pay for the equipment, etc, etc, one would be better off dining by candlelight.

Fumesucker

(45,851 posts)
5. Here are some human power output over time graphs
Fri Nov 13, 2015, 08:22 PM
Nov 2015

Some outstanding athletes can do surprisingly well but most of us are not very powerful.



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