So for TXVs I always just go to Sporlan’s literature. I honestly have never designed a system using a fixed orifice because usually if it’s worth the time to build something it’s worth the $60 for a real TXV. Also, I’ve had very poor results with the tech support at sporlan, the last two times I called and spoke with an application engineer they undersized the valve. But their lit was spot on.
Here’s the bulletin that I pull nearly everything from: 10-9.pdf (1.2 MB)
It’s a bit of a read but it’s very very comprehensive
So if we want crazy extreme we’d have to use ammonia because it’s awesome and horrible all at the same time. But if we really want bonfire powered, some sort of boron salt like they use in adsorption chillers is probably the trick
I was just reading about 508b as an improved r23 mix last night. I love r23 and I also love aezetropic refrigerant mixes. Sounds like a winner in my book
I dont think I should start a whole new topic but- I want to pull a vac on a 6x6 fully jacketed spool for insulation. Anyone have experience? Is pulling a full vac likely to make it implode?
Little searching should reveal at least a dozen examples of folks pulling vac on their 6” jacketed material columns. Only implosions you’ll find mentioned would be Bizzy columns with liqCO2 run through them…full vac is 15psi. LiqCO2 runs 70ish
I looked at the link and that was the spool imploding, Im more worried about the thin jacket. I just happened to get this thing but Id rather it hold temp than me manipulating it with water flowing.
Well translation? are you being a smart!@# The link you provided showed a collapsed train car from draining water. Sorry for asking to be safer. I guess I shouldnt have used the search engine to find this thread.
Liquid Co2 all the way unless you have 40k to throw at a quality chiller. I achieve -60c down to even -70. China jackets probably won’t cut it for this,
I’m not exactly sure what you’re asking. At atmospheric pressure, gaseous nitrogen can be any temperature above the saturation temp of -320F. As pressure increases, that saturation temperature increases (ie the temperature that liquid N2 boils)