Minus 80 degrees

So just…

How do you transport materials at such low temperatures. I’ve never known a reefer that I could set any lower than minus 30.

Where are the fridge tranpsort specialists when you need them?

In a liquid nitrogen filled vessel. Like a big thermos. Vets use them to store and transport ■■■■■ in.

OwenMoney:
In a liquid nitrogen filled vessel. Like a big thermos. Vets use them to store and transport ■■■■■ in.

That’s called a Ship or a Submarine… :smiley:

We could do with a Consultant Refrigeration Engineer… Were is he

Darning his socks.

Didn’t BOC (Gist) used to have nitrogen vehicles on M&S, they had to leave back doors open for a short period before unloading, or is my memory playing tricks on me[emoji2957]

Plumbers use Nitrogen to freeze pipes, its old technology like dry ice.

Sixties boy:
Didn’t BOC (Gist) used to have nitrogen vehicles on M&S, they had to leave back doors open for a short period before unloading, or is my memory playing tricks on me[emoji2957]

They did in early 2000s, I did the training on them but never used them. Wasn’t for -80 though, just chill and maybe frozen, I seem to remember seeing some Waitrose trailers with this as well, never really caught on though.

Done a bit of fridge work over the years, even getting the things to maintain temp at +3 can be a challenge, never mind -80.

Liquid nitrogen is minus 196 degrees C, a tad colder than -80
Dry ice, which is just frozen carbon dioxide, is -80 degrees

Sixties boy:
Didn’t BOC (Gist) used to have nitrogen vehicles on M&S, they had to leave back doors open for a short period before unloading, or is my memory playing tricks on me[emoji2957]

When I first started out on agency work in 1990 at the BOC M&S depot in Thatcham they were using liquid nitrogen fridges then. There were warnings plastered all over the back of the trailer inside warning to allow 10 minutes between opening the door and going in. The bay foremen at the stores were always strict about complying with the rule.
Nitrogen is an inert gas, it displaces oxygen but the human brain can’t recognise it so unlike carbon monoxide poisoning where you choke and gag for air you’re not aware your suffocating. You just pass out and die peacefully unless someone recovers you.

We have a plentiful supply of ‘cold’ in this country.
Bulk gas carriers from the Mid East arrive with cargoes of Liquid Natural Gas…which as a minimum is minus 161 C.
At the moment, that cold is wasted as the gas is returned to its gaseous state by warming and added to the gas national grid. It could be used for a variety of things.

Minus 80 C, is plus 203 K, isn’t it?
Don’t seem cold at all.

Do your fingers go blue when they stick it in your arm ?

mc:
Do your fingers go blue when they stick it in your arm ?

You will start glowing green, like a ReadiBrek kid, if you’re within a mile of a mobile phone mast.
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.
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(Or so Karen off Facebook says)

The Ready…

Brek kid was green?! WOW I never knew that.

We only had black and white.

I thought this was about the temperature in the Oval Office. :smiling_imp: :smiling_imp: :laughing: :laughing:

Firstly, I’m not a consultant refrigeration engineer. (Far from it in fact!!) :grimacing:

One of my DGSA clients routinely uses fridges that are easily capable of -80 C, he has several of them mounted in in the back of his very specialised truck. Appearance wise, these look like a bigger version of an upright fridge/freezer that we’re familiar with at home, the difference being that they have a settable temperature and a calibrated digital temperature readout.

He also carries all sorts of stuff (some of what he carries is rather… :open_mouth: :open_mouth: ) in the type of vessel described by OwenMoney above, which for ADR purposes fall into two kinds:

1.) Open cryogenic vessel
2.) Closed cryogenic vessel

As said above by other posters, this is not new technology.

^^^ you know as well as I do Dave the temperature of the stuff we used to cart about. It wasn’t absolute zero, but it bloody well felt like it if you came into contact with it :blush:

However there’s a vast difference in between carting cryogenic gases around and actually using said gases in a vehicle to cart other stuff around. My concise opinion on costs would fall into the “bloody expensive” range.

Not quite -80, but I had to swap over a fridge container at a hospital that was faulty, it was for keeping Covid 19 testing kits in, the tech on duty there, said, it was full of testing kits, to the value of £15 million.

Sapper

the maoster:
^^^ you know as well as I do Dave the temperature of the stuff we used to cart about. It wasn’t absolute zero, but it bloody well felt like it if you came into contact with it :blush:

However there’s a vast difference in between carting cryogenic gases around and actually using said gases in a vehicle to cart other stuff around. My concise opinion on costs would fall into the “bloody expensive” range.

Ahh yes maoster, that was at a positively tropical -56 C, so about a third of the temperature need before we get all excited and start using the word “cryogenic.” :smiley: