Specific Volume water antifreeze mix

  • Thread starter andyhol
  • Start date
  • #1
2
0
What is the expansion change of a 50-50 mix of water and antifreeze as the mixture goes from liquid to gas. If possible both Propylene glycol and Ethylene glycol; but, I am not picky, either would be extremely appreciated.

Many Thanks
Andy
 

Answers and Replies

  • #2
berkeman
Mentor
58,426
8,499
What is the expansion change of a 50-50 mix of water and antifreeze as the mixture goes from liquid to gas. If possible both Propylene glycol and Ethylene glycol; but, I am not picky, either would be extremely appreciated.

Many Thanks
Andy
Welcome to the PF.

What is the context of the question? What is the application? Or is this for schoolwork?
 
  • #3
hilbert2
Science Advisor
Insights Author
Gold Member
1,455
478
Ethylene glycol can not boil at normal atmospheric pressure. If you heat it enough, it just gives off a huge amount of smoke and decomposes to form other compounds. You might get it in gas phase with vacuum distillation, though.
 
  • #4
2
0
Berkeman -
It is not for school work, I'm too old for that :-) It is for an idea/concept that I have, that I would prefer not to post here.
If water froze at a lower temp it would be ideal in my application. My application will go from liquid to steam, do to heat, be reclaimed cooled too liquid and then the process repeats. I need the expansion rate close to water (1600 times) and it needs to be a quick change. Was hoping a 50/50 mix with antifreeze might come close.

Hilbert2- I saw a materiel spec sheet that said it flashed at something like 480 F. If mixed with water does it still burn/decompose?
 
  • #5
hilbert2
Science Advisor
Insights Author
Gold Member
1,455
478
Hilbert2- I saw a materiel spec sheet that said it flashed at something like 480 F. If mixed with water does it still burn/decompose?
If the mixture is heated, the water boils off first and when there's only glycol left, it starts decomposing.
 

Related Threads on Specific Volume water antifreeze mix

  • Last Post
Replies
6
Views
7K
  • Last Post
Replies
4
Views
6K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
2
Views
34K
  • Last Post
Replies
1
Views
505
Replies
4
Views
14K
  • Last Post
Replies
4
Views
769
Replies
1
Views
2K
Replies
4
Views
2K
Top