I recently attended a "New Hire class" for Air Products for a bulk driver and of all the videos and pp presentations I saw, this video was the most easy to understand how cryogenics delivery works.
Interesting. It looks like they were using dyed freon as the demo liquid. That "subcooling" term is a terrible misnomer since what it's actually describing is pressure induced superheated liquid that can flash boil. Wonder if they're still using that term.
I was thinking maybe butane, but could have been freon I suppose. And I think that the industry has turned subcool into a phrase of art, but they talk around it. Basically my understanding is that subcooling is the state of a fluid at a temperature below that needed to stay liquid under the system pressure conditions. If the system pressure is steady, than to achieve the state of subcool you have to lower the fluid temperature. But for a stable liquid temperature, if you raise the system pressure above the vapor pressure point of the liquid, it is now in the state of 'subcooled", but you reached that state from the other direction. I first learned about subcooling in the context of refrigeration, where it is talking about removing temperature to bring it below system pressure, so it took me a while to figure out how they are using it in this industry, but I think I am correct that here they are using the term to refer to the state of the liquid being cold enough to have a vapor pressure below system pressure, where other uses are referring to the process of removing heat energy to bring it below system pressure.
I recently attended a "New Hire class" for Air Products for a bulk driver and of all the videos and pp presentations I saw, this video was the most easy to understand how cryogenics delivery works.
I often wonder about crygenic fluids.
Interesting. It looks like they were using dyed freon as the demo liquid. That "subcooling" term is a terrible misnomer since what it's actually describing is pressure induced superheated liquid that can flash boil. Wonder if they're still using that term.
I was thinking maybe butane, but could have been freon I suppose.
And I think that the industry has turned subcool into a phrase of art, but they talk around it.
Basically my understanding is that subcooling is the state of a fluid at a temperature below that needed to stay liquid under the system pressure conditions.
If the system pressure is steady, than to achieve the state of subcool you have to lower the fluid temperature.
But for a stable liquid temperature, if you raise the system pressure above the vapor pressure point of the liquid, it is now in the state of 'subcooled", but you reached that state from the other direction.
I first learned about subcooling in the context of refrigeration, where it is talking about removing temperature to bring it below system pressure, so it took me a while to figure out how they are using it in this industry, but I think I am correct that here they are using the term to refer to the state of the liquid being cold enough to have a vapor pressure below system pressure, where other uses are referring to the process of removing heat energy to bring it below system pressure.
do you have the rights to publish this video? This video belongs to Air Products
I'm sure they're really desperate to protect the copyright on a 4 decade old internal safety video.
Ohhh piss up a flagpole lol airpriducts don’t care bruv