For my Physics project, I'm required to build a solar water heater.
-It must hold & heat 200 ml of water
-It must use ONLY sunlight.
-It can be up to the size of 15 x 15 x 15 cm
-It may NOT use Solar cells/panels or electricity.
-It must heat the water as much as possible in 30 minutes, sitting out in the sun.
I was wondering if anyone had any ideas.

Question

anonymous · Answer

Even a website would be good...just please help me!

aravindg · Answer

i have  nice  document with me on this:

aravindg · Answer

was that helpful?

anonymous · Answer

A bit...but I can't do it because my heater has to be much smaller that that and will be sitting outside.

aravindg · Answer

hmm...

anonymous · Answer

I was thinking about putting copper coins(nickels or ten euro cents) at the bottom of a small container and using tin foil to direct sunlight at it but I have no idea how to do that.

anonymous · Answer

I was also toying around with the idea of a network of straws but I was afraid I couldn't fit all the water in it.

amistre64 · Answer

http://www.google.com/search?aq=f&sourceid=chrome&ie=UTF-8&q=solar+oven

mos1635 · Answer

choose that it's easy and cheep but out of given diametions http://www.hometrainingtools.com/build-a-solar-oven-project/a/1237/

anonymous · Answer

i guess the best you can do to increase the temperature is by reflecting the light at the right angle when it is sitting in the sun ,with the aluminum foil or whatever material you will use. the overall structure of the heater will pretty much be the same in most of the websites you will find.

anonymous · Answer

put the glass at the top, http://www.solargenix.com/hot_water_products.cfm