FLASH GAS

[papa_jo]

Why does not enough sub-cooling cause flash gas in
rhe liquid line ?? Is there more than one reason?

[TitleLess]

pressure drop or temp rise in the liquid line,

but theoretically not enough subcooling in the liquid line will not cause flashing,,, If you have one degree of subcooling it will not flash unless the pressure drops further or the temperature of the liquid increases,

[bigtime]

As the liquid refrigerent flows through the piping the pressure in the piping will decrease over the run of the pipe. If the refrigerent is near the saturation point, this reduction in pressure will reach the point to which the refrigerent will flash.

[otto]

yep...what they said. ^^^^^^^^^^^^^^^

[dutchcool]

Try to understand the Mollier charts, it is a helpfull tool.

[papa_jo]

Thanks for your help in understanding this

[RoBoTeq]

That's a cool "connect the dots" shark fin.

[oroy54]

That chart is for R22 right? All liquids or gasses behave differantly at given temptures and pressure. Just for fun, if you taken Hexane, pressure it up to 3500# drop it to 100# it will heat up. But pressure it up to 3500# drop it to 0# it will cool down. Funny how things behave when there under pressure! Roy

[Edited by oroy54 on 02-18-2006 at 03:05 PM]

[outside rep]

I get flash gas but thats only after I eat at Taco Bell and have a lighter

[dutchcool]

Originally posted by papa_jo
Thanks for your help in understanding this

I am sorry!i hadent had enough time when i first posted.
I dont know if you in the U.S. are using the same type of chart, i think you might use a differend one, and makes this one look upsidedown perhaps.
I will try to explain what i know of it, [dont expect to much, hihi]i have to translate my thoughts becouse normaly i speaka the dutch.
The area what we are talking about is in the orange cirkel.
If that point moves to the area inside the ,,shark fin" [the left part shows the saturated liquide line] you will have flash-gas,it is no longer 100% liquide but there is some vapor in it as well.
The sat.liq curve represents heat in liq.refrigerant at differed pressures befor it starts to vaporizing.
I hope this is of some help.
I ask others to confirm or tell it wright.

[papa_jo]

thanks Ducthcool I am in the US southern us south carolina