I am doing a project on thermal power. I need a substance which can retain heat fot long periods and can be used to produce steam when wound around a water tube. CAn some1 help me? I have heard that liquid sodium is useful. Is that true. If so how do we get it?
2006-09-07 15:40:46 · 5 answers · asked by Neo 1 in Education & Reference ➔ Homework Help
Forget working with sodium, it's dangerous. Try one of the heat absorbing pastes used by welders.
2006-09-07 15:43:34 · answer #1 · answered by Rockvillerich 5 · 0⤊ 0⤋
liquid sodium? where can you get some?
if you are talking about actually getting some and this is not just a theoretical on-paper problem, then I think you are on the wrong track
I don't think you are prepared to deal with liquid sodium
it is very difficult and dangerous to handle
you would be much better off to choose a thermal oil
anything with a boiling point and degradation region sufficiently above the saturated steam temperature you are generating
(you don't want to boil your oil or burn it up)
there are many heat transfer oils made just for that sort of thing (dowtherm is the name of a line of Dow heat transfer oils)
for low temperature steam (under 250) regular mineral oils can work
hot oils are not nearly as dangerous as (heaven help us) liquid sodium, but they are still very dangerous, don't go trying to build a hot-oil steam boiler unless you know what the heck you are doing
2006-09-07 22:47:28 · answer #2 · answered by enginerd 6 · 0⤊ 0⤋
AH. Don't know the first part of your question, however, Sodium is a metal. In its natural state it is very explosive and dangerous.
If you made it into a liguid it would have to be a suspension in kersosene or something that would isolate it from oxygen.
2006-09-07 22:45:02 · answer #3 · answered by sshazzam 6 · 0⤊ 0⤋
Liquid fusible alloys can be used as coolants in applications where high temperature stability is required, eg. some fast breeder nuclear reactors. Sodium or sodium-potassium alloy NaK are frequently used. Another liquid metal used as a coolant is lead, in eg. lead cooled fast reactors. Some early fast neutron reactors used mercury.
For very high temperature applications, eg. molten salt reactors or very high temperature reactors, molten salts can be used as coolants. One of the possible combinations is the mix of sodium fluoride and sodium tetrafluoroborate (NaF-NaBF4).
2006-09-07 22:44:54 · answer #4 · answered by DanE 7 · 0⤊ 0⤋
...sea water.
2006-09-07 22:46:37 · answer #5 · answered by R J 7 · 0⤊ 0⤋