Putting trans-critical CO2 system into its new home! Works not suppose to be so much fun!
Putting trans-critical CO2 system into its new home! Works not suppose to be so much fun!
needs moar details.....and pics of the system in place and doin it's thang......
without the details, I'm lost, because I have no idea what a trans-critical CO2 system is.
You can't learn a thing with your mouth open.
Google? youtube?
But, it's his post with his system. I can educate myself all day long on all types of things, but I like the conversational approach.
You can't learn a thing with your mouth open.
This is the first Trans-Critical CO2 store going in within the United States. CO2 means extremely high pressure. Yesterday I met with the engineers from Hill Phoenix. We unwrapped one of the 4 rack systems going in. I myself do not know anything about this CO2 system but I am amped up to be running this project! The guys from Hill Phoenix gave me a brief synopsis of all the components and their operating pressures. Discharge pressures run about 1780 PSI. That is no joke there. I plan on erecting a blast chamber where I can stand while doing my pressure testing. We are having a training class next week. And Ill be able to share more then. Here is some eye candy for you in the mean time.
That looks really awesome. Keep us posted on it.
Tomorrow I have a 10,000# Lull coming in so we can lift the heaviest rack into the room. The first one they sent could not lift rack DT3. Walkin freezers and coolers are being built. Underground plumbing is going in and probably next week we will be doing a helicopter lift to put the 5 condensers, oops I mean GAS COOLERS on the roof. Work aint suppose to be so much fun!
Wow. That's a big deal. I take it from the pic's that this is an existing building being renovated into a supermarket? Are all the piping systems dropped down to the cases from overhead? Thanks for the info. Great pics.
You can't learn a thing with your mouth open.
[QUOTE=Fridge Repairer;14686151] "Tomorrow I have a 10,000# Lull coming in so we can lift the heaviest rack into the room. The first one they sent could not lift rack DT3."
Did the lift operator try to lift it and couldn't?
I wouldn't let ANYBODY near any equipment without assurance on paper of lifting capacity and insurance. I have seen lifts where a machine got it off the ground and one small factor caused the load to drop.
Even showing up on site then checking capacities and load weights is kinda too late...
The lift operator is ultimately responsible but if your equip gets damaged there is probably a shortage of replacement units on the shelf.
Not trying to grind your gears but hoping to save you some grief!
I too am looking forward to further pics of this cool job.
Hope it goes perfectly for you!
Nice Pics.
Knowledge is knowing that a tomato is a fruit. Wisdom is knowing not to put it in a fruit salad.
20120198674 That patent paying off,, would love to pick your brain,, congrats
It's amazing how much of an investment has been made to get the Valve Core Gripper off the ground. Im not in the green yet but I am climbing out of the hole. All the profit I make I reinvest back into the tool. Currently working on the drawings to get a production run of the Enviro-Gripper going. Hope to get it out by the end of the year. Between my job and chasing my dreams I'm working 24hrs a day! Whats your question zartangreen?
Sorry for delay been working my other Job which is Cha$ing my money,, 2 Many questions for Public,, nothing like a Hand shake. But my 1 question is are u prepared for the hvac expo in nyc next year. I heard U wont have no problems with the Booth location. I was actually at chicago last year and I was treated well. So I would like 2 do the same. I dont know who is Miguel Jordan is and i know i can find a tigers in the woods. I pass a rod to my helper Alex.
People like You are the one's that make the world go round.. Maybe we can share a booth either way I will open many doors if u just answer a few questions,,
I have a clan of Union carpenters so dont worry about that javits center Lock. Open 4 U. I swear I thought of groupon years a go. And knew FacBuoK was dangerous.
I also have vendors ask me for favors,, Nothing shady just the outcome of being good 2 people for no motive.
Customer is alWays opposite of Left
Neat stuff.
I've been kind of struggling to wrap my head entirely around trans-critical CO2 refrigeration.
It's a weird system.
and all the piping will be brazed with sil-fos? will it hold? or do you have to use special jointing method? That's a lot of PSI
gas cooler, eh? does it condense it to liquid? or just take some temp off? never even looked into CO2 application. do they use the same refrigerant cycle?
Have tools and gauges, will travel.
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RIDGID|YELLOW JACKET|UEI|TESTO|STANLEY|CPS|VETO| KLEIN|MILWAUKEE|MASTERCRAFT|
Racks are in place. We have 4 systems. Now that I had the training class, I'm a lot clearer on how these things will function. I am honored and privilaged to have this opportunity and would like to thank my boss and his family for everything they have done for me. My batteries are all charged up for this install! I have started working 7 days a week! I love my family. My wife is very understanding and supports me in every way imaginable. Right now I'm really loving my job. So much so, Ive had zero opportunities to work on getting the Valve Core Grippers into the supply houses. Yet another goal of mine for the year. My New Years resolution was to get more organized. 2013, the year of the Organization!
JPSmithcm1 -
"Neat stuff.
I've been kind of struggling to wrap my head entirely around trans-critical CO2 refrigeration.
It's a weird system."
Maybe this will help JP - These three articles are from ACHR News back in 2003 - 2004 on Transcritical and Subcritical refrigeration that explains it pretty well.
The first one explains the cycle and the last two are examples of installations in a supermarket in Copenhagen, Denmark in the first one(pretty interesting), and system compatibility and safety in the second one.
http://www.achrnews.com/articles/co2...critical-cycle
http://www.achrnews.com/articles/co2...ermarkets-cool
http://www.achrnews.com/articles/co2...-refrigeration
Alright.
I knew all that, already.
Here's what has been kicking my a$$ as far as grasping this system.
How is any refrigeration being done? Since the CO2 is hitting the HPEV as a supercritical fluid, it isn't truly a liquid and, thus, isn't changing state as we're accustomed to seeing.
Without a change of state, you're not going to be absorbing heat and, therefore, you can't be refrigerating.
Start at the beginning, the gas cooler (or just think of it as a condenser), is still giving its energy away. Because the gas is trans-critical, the molecules are just not sticking together as in a liquid. Even though it has the energy as if it were a liquid.
When the trans-critical fluid (i use fluid, not the word liquid), hits the expansion device (pressure drops, below the trans- critical point. As with a normal refrigerant, part of the fluid reverts to liquid and the remainder reverts to a vapour. The colder the cooled trans-critical fluid (like sub cooling), the less flash gas you have after the expansion device, and the greater the liquid and more net refrigeration effect.
You may find, that the CO2 which is delivered to the cases, is not trans-critical, (as change as happened at a the second stage of compression)
Have you ever seen cold after your nitrogen valve, when purging, another trans-critical fluid. Look up Joule Thompson.
Read it again JP. Halfway down the page on the first link.
"Figure 3 represents a transcritical cycle with CO2. The cycle diagram looks the same; the only difference is that the heat rejection process occurs above the critical point. Unlike the subcritical condensing process, where temperature stays constant, temperature decreases during the entire transcritical heat rejection process. There is no condensation in a transcritical cycle, and we call the process gas cooling. In low ambient conditions, the process might occur below the critical point, and condensation, rather than gas cooling, would occur. This is the fundamental difference between subcritical and transcritical cycles"