UKtramp:
So correct answers were given, the windsock is important to understand as many deaths have occurred through people not knowing what to do in the event of an ammonia escape. Every cold store that has an ammonia system has to adopt and have an approved evacuation plan and it is law that everyone who visits a cold store has the plan explained to them, vsiting drivers for some strange reason do not have to know this, I was involved in a 6 ton ammonia escape once and I can assure you it is a frightening experience for all involved. I had to deal with the leak and even in a full suit and breathing equipment was no laughing matter. It is a horrible death to endure, ammonia is the worst refrigerant with regards to humans but environmentally friendly so is now becoming more popular. Refrigeration engineers who specialise in ammonia systems like me need to have a seperate licence. A lot of refrigeration engineers stay well clear of it because it is so lethal to work on. So you may mock the importance of the wind sock, but it is very important in the event of an evacuation.
Isn’t ammonia dangerous for rivers and lakes? From memory it acidifies (?) The water killing the fish.
UKtramp:
So correct answers were given, the windsock is important to understand as many deaths have occurred through people not knowing what to do in the event of an ammonia escape. Every cold store that has an ammonia system has to adopt and have an approved evacuation plan and it is law that everyone who visits a cold store has the plan explained to them, vsiting drivers for some strange reason do not have to know this, I was involved in a 6 ton ammonia escape once and I can assure you it is a frightening experience for all involved. I had to deal with the leak and even in a full suit and breathing equipment was no laughing matter. It is a horrible death to endure, ammonia is the worst refrigerant with regards to humans but environmentally friendly so is now becoming more popular. Refrigeration engineers who specialise in ammonia systems like me need to have a seperate licence. A lot of refrigeration engineers stay well clear of it because it is so lethal to work on. So you may mock the importance of the wind sock, but it is very important in the event of an evacuation.
Isn’t ammonia dangerous for rivers and lakes? From memory it acidifies (?) The water killing the fish.
water dilutes ammonia and is used in the event of an emergency, firemen spray water in an umbrella style like a huge fan to hold back an ammonia cloud. Water soaks up the ammonia harmful chemical elements so if you were a fish its not good news. Trees are the same it kills trees turning them black, however it is only in large quantities where it would become harmful
If I put my meat in… (Oh never mind you can guess where I’m going with this).
Ice cream I’ve found crystallises and makes it all nasty if took out the freezer then refrozen after a long length of time. So I prefer to whip it out and put it back in as quick as possible, just like my meat.
Dipper_Dave:
If I put my meat in… (Oh never mind you can guess where I’m going with this).
Ice cream I’ve found crystallises and makes it all nasty if took out the freezer then refrozen after a long length of time. So I prefer to whip it out and put it back in as quick as possible, just like my meat.
Good advice D_D I can see you taking Beavers place in the refrigeration stakes. Beaver with my help could have easily attained design engineering status for Zanussi.
Dipper_Dave:
If I put my meat in… (Oh never mind you can guess where I’m going with this).
Ice cream I’ve found crystallises and makes it all nasty if took out the freezer then refrozen after a long length of time. So I prefer to whip it out and put it back in as quick as possible, just like my meat.
Do you have any veg to go with your meat Uncle Dave?
Dipper_Dave:
If I put my meat in… (Oh never mind you can guess where I’m going with this).
Ice cream I’ve found crystallises and makes it all nasty if took out the freezer then refrozen after a long length of time. So I prefer to whip it out and put it back in as quick as possible, just like my meat.
Do you have any veg to go with your meat Uncle Dave?
Why yes I have a couple of juicy sprouts that I can normally squeeze in at the same time.
Never understood this maybe you can answer,My fridge has a beeping alert if the door is left open for too long…but the freezer doesn’t why is this as surely out of the 2 compartments it’s the freezer part and the food within it that will suffer the most if left open for an extended period of time!!!
Also whilst we are on the subject of life’s misterys,why is it that ready salted crisps cost the same and say salt and vinegar and cheese and onion when your only getting the one flavouring and no two like the dual flavoured crisps?
Surely this is something that should be addressed by the court of human rights before we brexit Europe?
Captain Caveman 76:
Something that’s been bothering me for years.
Does the light in the fridge stay on when you close the door.
You know full well it doesn’t unless the switch is knackered, however here is an interesting fact about lights in fridges for you. Did you know that a lot of body stores have lights that stay on inside of the store? If they don’t stay on the handle has to have an i luminous surround like a clock face. Bet you didn’t know that did you now!
Captain Caveman 76:
Something that’s been bothering me for years.
Does the light in the fridge stay on when you close the door.
You know full well it doesn’t unless the switch is knackered, however here is an interesting fact about lights in fridges for you. Did you know that a lot of body stores have lights that stay on inside of the store? If they don’t stay on the handle has to have an i luminous surround like a clock face. Bet you didn’t know that did you now!
You’re quite correct, I did know that.
I’m guessing the body stores have to have permanent lights on in case someone is in there by accident ie not actually dead yet, just appears to be.
Captain Caveman 76:
I’m guessing the body stores have to have permanent lights on in case someone is in there by accident ie not actually dead yet, just appears to be.
There have been numerous cases where people have woken up in a body store and in the pitch black it would be frightening, especially if you could not get out. That is why the rule came in.
UKtramp:
So we have determined that ammonia although lethal is a very good refrigerant, all refrigerants have to have certain properties to make it a viable refrigerant. However there are trade offs with every single refrigerant available. The design considerations as to which refrigerant to use is important at this stage, a general rule is that you cannot mix refrigerants and the associated refrigeration equipment will not generally be able to accept other refrigerants once a certain type has been used. A classic example is the phase out of R22 which was widely used throughout the world. This caused and still is to this day causing major problems with the phase out and it’s replacement. You will hear from some that you can convert an old R22 system to use a different refrigerant. This is seldom done and is an emergency procedure more than a viable solution. Some companies and cold stores have litraly shut down and gone out of business through the cost alone. My company has a stock of recycled R22 used for repairs and leaks only, you cannot buy virgin R22 anymore, even though the Chinese still manufacture it, it is difficult to move it out of the country and is now banned from resale. As can be seen that banning certain refrigerants is a real headache and does happen so the choice of the refrigerant has to be chosen wisely as to its sustainability and cost.
You cannot buy any R22 any longer virgin or recycled.
UKtramp:
The windsock is used to show the direction of wind so in the event of a catastrophic failure, everyone evacuates in the opposite direction. You have aprox 30 secs to get out of an ammonia cloud before a horrendous death takes place. It was an important point that I doubt many actually know but really should.
Let’s get this right they choose to use a very toxic option that also has the potential to asphyxiate by oxygen displacement if toxicity doesn’t get anyone first. On that note what if it’s a totally still day under high pressure weather conditions.
How does R- 410 A compare with Ammonia regards safety ?.Also bearing in mind older types being reputedly known for the potential of creating Phosgene gas and blindness in the event of a leak regarding vehicle air con systems at least.
On that note what if it’s a totally still day under high pressure weather conditions.
