I am looking forward to my racks being converted over to CO2 in the near future!! Training so far has been awesome, it’s the way the future is heading guys! The more you know the more valuable you are in a demanding field of work!!!!!
Love this video. I spent 44 years in supermarket refrigeration in the North East. I did mostly start ups and troubleshooting of all the newest racks and retired in 2016 to SC. I worked alot on glycol systems, all have been Hill Phoenix racks. Unfortunately just missed out on CO2. Two years after retiring, Wegmans installed that very Cascade system you have in this video. I constantly keep up with the changes in the business and have even taken online courses in CO2. Please keep up the great vieos and look very much forward to your transcritical rack start up and tour. Thank you.
I’ve fought those EEV’s on the condensers/chillers shutting and causing high vessel pressures at a target. PID and TR was out of wack, causing daily discharge trips. Good times.
No idea how I found your video, but now that I'm here I have a question. I'm 42, and ever since I learnt about adiabatic expansion at university about 20 years ago, I've wondered why fridges, freezers, AC etc uses so many different gasses to produce the same result. So in my head all I can come up with is the stability of the compound used. If it degrades over time and creates a residue then that's obviously a no go. Then I figure the temperature differential between compressed and expanded ought to be more or less the same between the various refrigerants . Unless domestic refrigeration compressors actually take them to the liquid state, then the enthalpy of the phase change will also contribute, but are domestic compressors really that hardcore? Very long winded, ranting way of trying to say it. If you can be bothered answering, then thanks! I tried googling but my god was there a lot of bullshit! 😂
Glad you found this. There is a lot that needs to be explained and can be very long but basically it’s about capacity and what the customer or engineer of equipment prefers. CFC and HCFC (like R12 and R22) are phased out because they had an ozone depletion potential so manufacturers started developing HFC but they have a high Global Warming Potential so they are being phased out. Different manufacturers developed different refrigerants and advertised to use them because they are better than the competition. Other refrigerants have a high compression ratio so basically depending on your design and capacity dictated which refrigerants worked best for that equipment. Hope this helps.
@@jrmayo_reftech Well it's just that a few years ago I bought a cheap bar fridge that was using cyclopentane. It's almost completely innocuous compared to CFCs, abundant and bloody cheap. So why the f*** haven't we been using it all along? Then during covid I picked up some work driving a truck, delivering Scope, Williams and a few other brands of commercial fridges/freezers. I noticed that even a good number of those were running on cyclopentane. That's why I've been left confused about it. For reference, I studied science at uni, majored in chemistry and pharmacology, and I'm still that little kid that says "but WHYYYYYY?!?" hahahaha. Hence why I'm here saying, "mr, but whyyyy??" lol
@R290s_biggest_fan lol I know all bout charge limits. Back when I was at uni and was a typical poor student I did all of the work on my piece of shit car. AC compressor was fucked so I threw a cheap second hand one in. There was a guy around the corner from where I lived that did regassing for $50 ($60 with the dye). The problem was that he applied the very Aussie attitude of "ahh she'll be right" to adding the refrigerant. He'd open valve on the cylinder with no regulator for a couple of seconds and say "yep, that should it". For a while I had AC in my car that was like a blizzard in Antarctica, but then one of the lines just gave up a exploded with eough force to rip my bonnet open. 😂 Went to someone else to get the refrigerant refiled. 😂
Awesome video, thank you for sharing and cheers! I used to work with Excell Refrigeration in SoFlo along John D, Dave M., Pete H. He used to be our Service Manager. Good days! Thanks again
It’s a refrigeration C02 (carbon dioxide gas) rack system, instead of using typical refrigerant gases that include fluorocarbons, which are chemical compounds of carbon and fluorine. That ultimately per EPA can be harmful to the environment, . More than likely the application we see here is for a supermarket.
