My HSC DT - Bike drink bottle cooler/heater

[Hex515]

Basically it just generates electricity from wheel rotation. Then uses a peltier device to either heat or cool drink bottle contents.

It kinda worked, but could have been better. Feel free to ask any questions or make any comments. :)

[wombat]

Basically it just generates electricity from wheel rotation. Then uses a peltier device to either heat or cool drink bottle contents.

It kinda worked, but could have been better. Feel free to ask any questions or make any comments. :)
Well done! That is much more impressive than a lot of the D&T projects I've seen. Kudos!

[cam-o]

Now mdoify it so it can fit in a pair of shoes and keep toes warm and every bugger in Canberra (and I'm guessing the Blue Mountains) will take a set. :D

[cheese]

Nice project! Very innovative:D , hope you get marked well for it.

[Constable Care]

that is so sick i think you may have an idea there

[Registered Nutcase]

thats pretty cool, how dose it cool the drink down?

[roxy12]

what kinda weight was that? (i do realize its just a test but just curious)

[Hex515]

To cool the drink bottle it develops electricity using a generator. The generatred electricity is then passed through a "peltier" or "thermoelectic" device, which is 40 x 40 x ~3 mm (basically a rectangular prism) and has two wires sticking out of it. This device, once an electric current is supplied to it, it sucks heat from one side of it (which when cooling is the drink bottle) and transfers it to the other side (hence the need for a heatsink which is in the open air flow). If you need more indepth detail just ask, I have diagrams I did and stuff.

It ended up weighing a total of 1.465 kg's, however that was using two electricity generators, which from memory weigh 300 grams each. The use of two generators basically make it cool better.

[TIMOH]

Thats heaps good Ben

[Rik]

Rather...umm... cool :cool:
A much better use for peltiers than keeping video cards cool! I've always been meaning to make a peltier beer cooler, but summer comes and summer goes and I can't be bothered. Maybe this year, just maybe :rolleyes:
What method of transferring heat from the bottle have you used?

[Hex515]

What method of transferring heat from the bottle have you used?

A thin sheet of aluminum bent in a cylinder that surrounds the bottle, then another piece is used as base for this and the peltier contacts with it. One of the problems was using a plastic water bottle so it didn't have very good thermal conductivity.

[Mr jesus]

That looks sweet.. does it affect you while riding is it harder to pedal or anything? What the minimum and maximum temperature you could get it to?

[fattyandthepiemakers]

Love that, every enduro or XC bike should have one, just not one that is so "homemade". What is that bike used for anyway? Im guessing road...? :confused:

[notb4dinner]

Interesting idea. Did you consider alternative power sources? How much power does it actually consume? Have you considered using an aluminium bottle - camping stores sell them in nearly, if not the same, sizes as a standard plastic bidon.

[Hex515]

Yes it does add resistance to the rider, you can feel it when you push the bike along. But when you are riding it probably makes a difference, but I don't really notice it.

The minimum/maximum temperature on the bike is hard to say as I didn't fully test it :p. However when testing it off the bike, the water temperature was down at around 13 degrees (left for 1 and a half hours, water started at 19 degrees), that was with a full drink bottle.

That bike is an old bike that isn't ridden. I would have used my good bike but then I would have had to have left it at school for marking.

I did consider alternative power sources.
-Solar wouldn't have been able to generate enough power with a "ridable" size panel.
-Wind/turbine wouldn't have been able to generate enough power.
-Batteries would have made it a non-renewable (is that right?.. I better go check it up before tomorrow) energy device.

It consumes around 12 volts at 4 amps, alot!

Yeah I did think about the aluminium camping drink bottles, infact I added that into the evaluation in my folio.

If anyone is interested in seeing or getting a copy of my folio, feel free to PM me.