This post is a serious post, it is for those who would like to know more about the refrigeration cycle and the freezing of certain produce that is carried in reefers nation and world wide. It will be interesting for some as it is not going to be common knowledge that you would know or even are expected to know. It will be interesting for general knowledge and to know something about goods that you carry and how complex a seemingly simple taken for granted procedure actually is. You will not find a lot of the information I will be giving you easily as refrigeration as much as it is science based there is the black magic side that you can only ever get from years of extensive experience and the correct training. Half the reason why good fridge men are like gold dust, I am of course referring to industrial refrigeration here and not your refrigerator in your home that is quite a simple process. Two entirely different games all together. So who am I to give this info out? I am indeed an industrial refrigeration engineer and consultant and am qualified to a level that gives me this knowledge that I am willing to pass over to you for either interest reasons or even to start you off with the knowledge to dig deeper and perhaps even seek out a new career. Stick with me as I am going to be telling you things that some would give their right arm for I assure you of that. Although refrigeration has a lot of complex mathematics involved with the design process I will steer clear of this and get into the meat and potato of what is more interesting than the math.
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Can’t wait… 
Be nice to read something informative for a change!
Everything on here is not crap but some threads are below standard for sure.
Well let us start with something everyone should already know, I will ask this simple question that is relevant to each of you. When you visit an RDC or similar sized cold store, you will notice that placed on the roof and at the front of the building there is a wind sock, does everyone know what this is there for?
To show the correct way to face when putting your boots on.
As a safety aid in case of a toxic coolant leak.
So you don’t get an icy artic blast when the cold store door is opened if you are standing downwind?
I’ve got a sock in me cab that I can almost knock nails in with.
Dipper_Dave:
As a safety aid in case of a toxic coolant leak.
Ammonia.
Having shown of his extensive knowledge, The Nodding Donkey will now return to posting crap.
So you know which way to face when ■■■■■■■ 
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.
Keep going UKt, everdays a learning day.
I love quizzes almost as much as I love queefs.
Oh, so many open goals…
UKtramp:
This post is a serious post, it is for those who would like to know more about the refrigeration cycle and the freezing of certain produce that is carried in reefers nation and world wide. It will be interesting for some as it is not going to be common knowledge that you would know or even are expected to know. It will be interesting for general knowledge and to know something about goods that you carry and how complex a seemingly simple taken for granted procedure actually is. You will not find a lot of the information I will be giving you easily as refrigeration as much as it is science based there is the black magic side that you can only ever get from years of extensive experience and the correct training. Half the reason why good fridge men are like gold dust, I am of course referring to industrial refrigeration here and not your refrigerator in your home that is quite a simple process. Two entirely different games all together. So who am I to give this info out? I am indeed an industrial refrigeration engineer and consultant and am qualified to a level that gives me this knowledge that I am willing to pass over to you for either interest reasons or even to start you off with the knowledge to dig deeper and perhaps even seek out a new career. Stick with me as I am going to be telling you things that some would give their right arm for I assure you of that. Although refrigeration has a lot of complex mathematics involved with the design process I will steer clear of this and get into the meat and potato of what is more interesting than the math.
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.
OK, I’m going to say it.
I actually think I prefer Carryfast 
God help me ! 
robroy:
OK, I’m going to say it.
I actually think I prefer Carryfast
God help me !
well I am only giving you the info you would not normally know or find out rob, look at it as knowledge of something that is related to the goods you move but is not necessary for you to know but it is in fact interesting. Stick with it rob as the interesting stuff will come I think there will be something for everyone here.
UKtramp:
robroy:
OK, I’m going to say it.
I actually think I prefer Carryfast
God help me !
well I am only giving you the info you would not normally know or find out rob, look at it as knowledge of something that is related to the goods you move but is not necessary for you to know but it is in fact interesting. Stick with it rob as the interesting stuff will come I think there will be something for everyone here.
I’m like a coiled spring on the edge of my seat mate.
Oh yeh…and I don’t do reefers anymore. 
'‘INTERESTING’ may be the wrong choice of word, not to mention a matter of opinion. btw 