Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: erickejah on 13/03/2009 14:34:41

Title: Is hydrogen a good coolant?
Post by: erickejah on 13/03/2009 14:34:41

What characteristics Hydrogen has over other elements that makes it the best coolant?

Title: Re: Is hydrogen a good coolant?
Post by: lancenti on 13/03/2009 18:07:51

I didn't think H2 would be a good coolant, especially since it can be combusted fairly easily.

But for the sake of discussion, it may have something to do with how it is quite close to an ideal gas.

Title: Re: Is hydrogen a good coolant?
Post by: lightarrow on 13/03/2009 20:41:57

Quote from: erickejah on 13/03/2009 14:34:41

What characteristics Hydrogen has over other elements that makes it the best coolant?

Do you mean in turbo generators?
It's because of low density, high specific heat, and high thermal conductivity:
http://en.wikipedia.org/wiki/Hydrogen-cooled_turbogenerator

Title: Re: Is hydrogen a good coolant?
Post by: Chemistry4me on 14/03/2009 02:19:27

Hydrogen or Helium erickejah?

Title: Re: Is hydrogen a good coolant?
Post by: erickejah on 15/03/2009 01:01:10

hydrogen, check this out:
http://www.michell.co.uk/documents/en/ele/electricity_generator_set_hydrogen_coolant.pdf (http://www.michell.co.uk/documents/en/ele/electricity_generator_set_hydrogen_coolant.pdf)

Title: Re: Is hydrogen a good coolant?
Post by: Raghavendra on 16/03/2009 09:58:58

Bcz it is lighter then air

Title: Re: Is hydrogen a good coolant?
Post by: Chemistry4me on 16/03/2009 10:03:13

Because it is lighter than air? What? How?
Since when has that ever been the reason? [???]

Title: Re: Is hydrogen a good coolant?
Post by: Raghavendra on 16/03/2009 10:20:33

catch a ballon  filled with H you will understand

Title: Re: Is hydrogen a good coolant?
Post by: Chemistry4me on 16/03/2009 10:23:59

Well, since I don't have a hydrogen balloon on hand, could you please tell me what happens that will make me understand that a gas lighter than air is a good coolant?

Title: Re: Is hydrogen a good coolant?
Post by: Raghavendra on 18/03/2009 07:34:32

Hmmm wait a minute i will have a cup of coffee

Title: Re: Is hydrogen a good coolant?
Post by: Chemistry4me on 18/03/2009 07:38:04

I can hardly wait.

Title: Re: Is hydrogen a good coolant?
Post by: Raghavendra on 18/03/2009 07:50:21

ok !!

Title: Re: Is hydrogen a good coolant?
Post by: Chemistry4me on 18/03/2009 07:55:02

Go on, what is the answer?

Title: Re: Is hydrogen a good coolant?
Post by: Raghavendra on 18/03/2009 08:11:07

Hmm seee Hydrogen and deuterium are colorless, odorless gases and hence not easily detected by human senses. Hydrogen air mixtures are flammable over a large range of relative concentrations: from 4 \%  to 75  \%  H2   by volume. Detonation of explosions can occur with very low energy input, less than fraction 1by 10 that required by mixtures of air and gasoline. At temperatures above -250 C hydrogen gas is lighter than (STP) air and hence will rise. At atmospheric pressure the ignition temperature is approximately 1000 degrees F but mixtures at pressures of 0.2 to 0.5 Atm can be ignited at temperatures as low as 650 degrees F. Hydrogen mixtures burn with a colorless flam..

 I think now you got it!!!

Title: Re: Is hydrogen a good coolant?
Post by: Chemistry4me on 18/03/2009 08:17:03

Uhhhh....





No.

------
I don't see how catching a hydrogen balloon is supposed to make me understand that hydrogen is not a good coolant (which I presume is what you are trying to say). [:)]

Title: Re: Is hydrogen a good coolant?
Post by: Raghavendra on 18/03/2009 08:21:19

I think we have to meet directly to explain, don't worry

Title: Re: Is hydrogen a good coolant?
Post by: erickejah on 19/03/2009 22:58:16

what about me [???] [???]

Title: Re: Is hydrogen a good coolant?
Post by: Raghavendra on 20/03/2009 06:31:01

 Ya you too, But what where to meet in Finland ........

Title: Is hydrogen a good coolant?
Post by: erickejah on 22/03/2009 02:33:28

Right here:
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=finland+nc&sll=37.0625,-95.677068&sspn=36.094886,67.324219&ie=UTF8&ll=35.867213,-78.721333&spn=0.072198,0.131493&z=13&iwloc=A
is the closest point for everyone.

Title: Is hydrogen a good coolant?
Post by: Chemistry4me on 22/03/2009 03:40:06

What on Earth is that for? [???]

Title: Is hydrogen a good coolant?
Post by: Raghavendra on 22/03/2009 08:55:38

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=finland+nc&sll=37.0625,-95.677068&sspn=36.094886,67.324219&ie=UTF8&ll=35.867213,-78.721333&spn=0.072198,0.131493&z=13&iwloc=A

These is not a place........   Ha aha h

   Let's meet in Hollyhood

Title: Is hydrogen a good coolant?
Post by: Chemistry4me on 22/03/2009 10:07:37

Hollyhood?

You'll get mugged before you can say 'Holly! My wood!'

Title: Is hydrogen a good coolant?
Post by: erickejah on 22/03/2009 18:37:24

 [:D] [:D]

Title: Is hydrogen a good coolant?
Post by: Raghavendra on 23/03/2009 10:41:53

 YA YA It's joke  [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D] [;D]

Title: Is hydrogen a good coolant?
Post by: Raghavendra on 23/03/2009 10:42:56

what are you guys waiting for book a ticket ...... 

  Come to My hood i will show you ......  How to mug

Title: Is hydrogen a good coolant?
Post by: erickejah on 26/03/2009 21:08:15

no, tx I pass

Title: Is hydrogen a good coolant?
Post by: Chemistry4me on 28/03/2009 07:50:44

Since I'm bored to death, I'll come.

Title: Is hydrogen a good coolant?
Post by: Raghavendra on 28/03/2009 08:13:10

why dude... Don't be...

Title: Is hydrogen a good coolant?
Post by: Chemistry4me on 28/03/2009 08:14:30

Don't be what? Bored to death?

Title: Is hydrogen a good coolant?
Post by: Raghavendra on 28/03/2009 08:26:07

Ya.. it's too risky you know...