steam temperature at 100 deg and 1.2 barg 3

[apooyana]

Dear all friend
Customer wana to have steam at above condition
any resolvent?
I work at a boiler producer

 

[katmar]

At 100 degrees (irrespective of whether we are talking Fahrenheit or Celsius) and 1.2 barg water is a liquid.

Katmar Software - AioFlo Pipe Hydraulics

http://katmarsoftware.com

"An undefined problem has an infinite number of solutions"

 

[LittleInch]

Tell customer that his requirement is against the laws of physics as we know them on earth.

Send him a copy of a saturated steam table and ask him or her to chose something physically possible.

e.g.

http://www2.spiraxsarco.com/esc/SS_Properties.aspx?lang_id=ENG&country_id=US

At 1.2 bar guage steam saturation temperature is 123 deg C

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[apooyana]

Thanks katmar
temperature is acc. to centigrade
as you say right its impossible to have steam only
I think the only way for having this condition is mixing steam with air for example.
what you think?

 

[apooyana]

Thanks littlelnch also
Yes , I send my question to him for more detail

 

[LittleInch]

Mixing Steam with air at 1.2 barg to get a mixed temperature of 100 Deg C will result in hot water mist.

Maybe that's what he wants, but you can't call it "Steam"

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Compositepro]

The vapor pressure of water at 100C is 0 barg or 1 bara. In order to get a pressure of 1.2 barg (2.2 bara) you have to add a partial pressure of 1.2 barg of air. The resulting mixture would be 1.2/2.2=0.545 or 54.5% air by volume and 45.5% water vapor (not mist). You can add as much air as you like but that will not cause water to condense. It is just that the partial pressure of water in a gas mixture at 100C cannot be greater than one bara.

 

[georgeverghese]

Solutes in water that most people know of elevate boiling point, ie at 1atm, you could raise the bp of water (most ionic salts, sugar etc). But this request requires a depression in bp; dont know if there are salts or other organics that can do this.

 

[apooyana]

Dear all friend
thanks about corporation
I think like Compositepro
a practical way can be this, but corrosion effect should be considered , and also nitrogen could be replaced instead of air.

 

[MortenA]

There is "no pratical way"!!! What you are asking for is (apoonyana= is hogwash! At 100ºC and 1.2 barg - water is only a liquid! There is no steam phase. But ofcourse - if there is a vapour phase above the water - there will be water in the vapour. The ratio between water and whatever other gas you have will be as described by Compsitepro. You can call this whatever you like - but for an _engineer_ its NOT steam.

 

[Compositepro]

Morten A does raise a very good point. The fact is once you have even a small amount of air in the steam it is a horrible heat transfer medium. An insulating air layer exists anywhere condensation is taking place.