I need to make a container for science class and it needs to hold in as much heat as possible if I put in hot water. But I can't use a Thermos and the device has to fit on top of my desk. Also, I need to be able to open the device and put in the hot water. This device can not contain a heater or hot material of any kind except for the container of hot water. I'd like to keep the materials easy to find and cheap. Thanks!
2007-02-12 21:54:44 · 5 answers · asked by Hyunmin 1 in Science & Mathematics ➔ Engineering
Start with a container to hold the liquid, then insulate it.
Insulation is any material with low heat conductivity. So try Styrofoam for the container after all hot cups are made of the stuff for a reason. Now you can wrap the cup with any insulating material and believe it or not air is a very good insulator. So cover the cup and place it in a larger cup with some airspace and cover the larger cup (it's actually just a homemade thermos at this time).
Fiberglass insulation might be a good idea but don't crush the fibers, The air trapped in it structure is what provides the insulation so if you pack it you will actually get less heat retention.
We can also go into the use of certain noble glasses which have less conductivity than air, but I doubt you have the resources and desire to get that carried away. I good example would be argon it's stable chemical structure which prevents it for conducting electricity also does the same for heat. Which is why high end double pane windows are argon filled.
2007-02-13 00:28:34 · answer #1 · answered by Brian K² 6 · 0⤊ 0⤋
You would need two containers. An internal one for the water and external enclosure. The most efficient insulation is reflective foil. The link show examples of it in detail. Wrap the water container with this insulation, and cover the inside of the enclosure with it. Then leave an air space in between the two(space it using pieces of the insulation). The device will hold the water hot for quite a while. Just preheat it with some hot water first.
2007-02-13 18:31:15 · answer #2 · answered by charley128 5 · 0⤊ 0⤋
First you kneed a container to hold the water, plastic or glass.
Next you kneed to insulate the first container with say Styrofoam or even dry tea towels can be used. It should totally enclose the container and not allow any heat to escape.
Dont forget to insulate the base too.
2007-02-12 22:24:55 · answer #3 · answered by aussie1_1950 2 · 0⤊ 0⤋
The water maintains to be warmer longer while that is boiled on the range simply by fact the metallic pot that is composed of the water is likewise retaining warmth. considering you microwave water in plastic bins which lose the warmth extra right this moment than pots, the water cools swifter. with out the container interior the equation, the water would lose warmth on the comparable cost.
2016-09-29 01:20:20 · answer #4 · answered by ? 4 · 0⤊ 0⤋