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Again?! When will these students realise a dynamo creates friction. Had it been something gravity based, could’ve been different (cart loading/unloading would’ve generated energy)

Students work for sure……. The idea aren’t cost effective at all…

What is this crap ? Designing something like this, and not even getting the distinction between power and energy ? blah !

Here’s a hint: W is a unit for *power* Joules, watt-hours or Kwh is a unit for energy.

It’s a bit as if he’s saying this car weighs 5 meters.

The rest is equally nonsensical, offcourse.

No idea what is going on in those “Amount of microgeneration” figures. “x8 time to operate (assumption)”: 8 of what, exactly?

40W x 4 = 160W. On an exercise bike at max load, I produce about 300W (according to its display). A little old lady, shopping, won’t be able to offer you more than a few tens of watts – and why should she? If you think I want to provide you with free power while SHOPPING, think again!

As noted already, there is no free lunch, and customers will have to work (hard!) against the friction of the dynamos as they extract energy from the cart’s motion (i.e. from you). Don’t get me started on the electrical problems with getting the energy off the carts with any kind of efficiency.

These small energygenerators are rediculous anyway
The only plusside is a free workout
But storage batteries, materials etc cost more than the profit
Its the same with getting enery out of roads: it will get fuelconsumption up
For now wind and water are the most efficient sources
In the future probably solarpower

Agree with all above comments. The designer (student?)went through a lot of “research” but failed to research the cost of manufacturing these. I give the designer some props on style and rendering, but he needs to consider all issues, for had he done so, he would have come to the realization that he would just be wasting his time needlesly, unless of course there was a professor involved.

This one is simply an ironic way to make ‘sustainable design’ ridiculous. Consumption is production? Disgusting….

also, the carts themselves sacrifice a great deal of practicality, the designer got rid of two functions of a standard shopping cart in the interest of the design. no child seat, and no rack on the bottom for big items. i guess it’s a way for compensating for all the ridiculous friction.

Just think of all the extra C02 these things will make as the customers (if there are any) huff and puff pushing these carts around!

Let’s just return to clean nuclear power. Less of the scary CO2. Plenty of clean heat.

It´s a concept, don´t get so carried away. I agree that is not functional, but is an idea that might develop into something else. It is easy to be the devil´s advocate.

Massive wind power stations are betting than small and expensive devices

I have been thinking of energy generating shopping carts as well. You just beat me to it. I think about it everytime I have to push a cart around for hours in the store to get items. I also have been thinking about it everytime I get shocked by the cart when pushing it around the store. I keep thinking that I wish there is a way to collect up all the energy that people create just by pushing a cart around. It just seems like something that can become productive rather than just a waste.

i had dreams about shopping cart generators……. why do i get beat all the time… …… my next idea is for a gps sensor in automatic weapons! that will work!

good luck students

i had dreams about shopping cart generators……. why do i get beat all the time… …… my next idea is for a gps sensor in automatic weapons! that will work!

good luck students

its realy good Idea

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