What kind of refrigeration system do you work on?

[lana]

Hi everybody,

This would be interesting to know the statistics about what kind of refrigeration system have the most engineers, designers,... .

So please vote here.

You can choose multiple options if you work in different refrigeration fields.

Thank you

[frank]

Well, as of 20.57 UK time today this Poll had received 34 votes.

The total % of votes = 186.67% :eek:

I don't see how the results will give a realistic picture of the proportion of votes unless Webram can convince us his maths are up to it :D

Check it out Dez. :confused:

[lana]

Well, as of 20.57 UK time today this Poll had received 34 votes.

The total % of votes = 186.67% :eek:

I don't see how the results will give a realistic picture of the proportion of votes unless Webram can convince us his maths are up to it :D

Check it out Dez. :confused:

Hi Frank,
I think the confusion is for the multiple choice in this poll.
Cheers

[WebRam]

Its because its a multiple choice poll, :)

[NH3LVR]

I work on five of the possible choices, although NH3 more than the others:o

[Tycho]

I work on five of the possible choices, although NH3 more than the others:o

What he said *points thumb over shoulder towards NH3LVR*

everything from 500W and up.

Havent gotten my fingers onto CO2 yet, but I don't think it will be to long before it happens *looks around nervously*

[lana]

Hi everybody,

Can those who vote "Other refrigeration technologies not mentioned above" explain what kind of system they work on?

Thanks

[LRAC]

Hi everybody,

Can those who vote "Other refrigeration technologies not mentioned above" explain what kind of system they work on?

Thanks

Hi lana
Air cycle systems

Regards
Lrac

[lana]

Hi LRAC,

I should have included that one too;) .

Thanks

[frank]

Absorption.....

[US Iceman]

Most of my main area is ammonia. Although at the moment I am working on two supermarkets and a CO2 system. The CO2 system I can't talk about in detail right now. Sorry about that.;)

[Andy]

Hi everybody,

Can those who vote "Other refrigeration technologies not mentioned above" explain what kind of system they work on?

Thanks

Flooded NH3, DX (Electronic valves) and Heat Recovery mostly.:) Also quite a bit of design work on Inverter drive compressor systems.

Kind Regards Andy:)

[ultralo1]

Sceintific Cascade, autocascade, and cryogenics

[lana]

Hi everybody,

Thanks those who have voted here.

From more than 11400 registered users only 37 cared to vote :mad: .
We are not voting for ....politicians here guys, make a couple of seconds and clike a button if you don't mind. If you mind then .....:(

Appreciate your vote.

Best regards
LANA

[jan willem]

Hi Lana,

50% low temp cascade
25% refrigeration
25% airconditioning

jan willem

[absrbrtek]

Other equipment serviced. Service mostly centrifugals currently, have over 32,000 tons in my accounts. Equipment is in the 275 to 2000 ton range. Also service screws and absorption chillers.

[TXiceman]

All types of mechanical sytems from -120 df and up using. HCFC, NH3, CO3, Propane, Propylene, Isobutane, ethane, lithium Bromide absorption and ammonia absorption.

Ken

[nh3wizard]

Hi everybody,

Thanks those who have voted here.

From more than 11400 registered users only 37 cared to vote :mad: .
We are not voting for ....politicians here guys, make a couple of seconds and clike a button if you don't mind. If you mind then .....:(

Appreciate your vote.

Best regards
LANA

I believe that most of the people who register have 1 question to be answered, and never come back...:(

[The MG Pony]

this site should use an auto purg system after no activity for X months it auto deleats the account.

I make micro chillers for PC cooling or starting to rather, still trying to build up the tools and parts to start.

[autt]

Hi lana
Air cycle systems

Regards
Lrac

Me too partner.

DX 20%
Liquid cooling 20% (not refrigeration?)
Air cycle 60%

Regards,
autt

[ntfreezer]

DX-Systems using CFC,HCFC,HFC
Liquid Overfeed Systems using ammonia

[paul_h]

Ticked DX systems in the pol.
Our company never says no to anything.
I do domestic split A/Cs and refrigeration.
Commercial package A/Cs, coolrooms and display refrigeration.
Hospital refrigeration (eg cryostats and cascade ultra lows).
Marine refrigeration, although I told them never again about two years ago after a 15hr shift,so I haven't looked at one for years. But we did refrigeration for the australian navy, including submarines, and small cargo ships (small enough they didn't have their own refrig tech that is).
Aircraft A/Cs, I do heaps of beechcraft, cesnas, and small helicopters for the local airport. I mean really small stuff here, under 12 seaters. They are basically the same as car airconditioning.

But I haven't work on a chiller rack since the last place I worked at 8 years ago.
And I've never laid eyes on a nh3 plant ever. edit: Well I've seen tiny ones on a boat, but never had to mess with one and never seen a big NH3 plant.

[Sinke]

...Ammonia make you feel great...:eek:

[carlfoster]

I work on the manufacture of server room dx units

[fridge tiff]

I work on A/C and multiroom systems on an aircraft carrier ( I know why Paul H says 'never again') The equipment is either 25 years old or so 'marine-ised' it's designers wouldn't recognise it. We have dispensation to still use R22 for goodness' sake

[squil]

Organic Rankine cycles...

[Plank!]

Pumped NH3
DX NH3 (chillers)
Pumped R22
DX R22, R134, R404, Propane
Pumped CO2 (with and without compressors on the CO2 stage...)

Mostly cold storage and distribution, tho recently lots of work with CO2 in data centers and and research labs.

BIG Recips, screws and recently Danfos"Turbocor" units.

The Turbocor @300KW refrigeration power is probably the smallest comp I see day to day. On NH3 1.5MW and more is common.

[Richard Hillsid]

My first post.
Domestic and commercial split A/C wall and roof, all major brands over the past 7 years, sales, installation and repair at -30 C outside temps. as a journey man, now narrowing down, have 2 installers working for me and sell domestic only.

[DRS_M03]

now i'm working on 2 stage cascade system, it's a research in my campus, using propane in high stage and... R23 or ethane or CO2 in the low stage,

and the most important for me now is to research the possibilities to mix refrigerant with other refrigerant and using it as the "new" refrigerant :)

[Fire and Ice]

Everything 7 and one half horse and lower except Co2 and amnonia

[Magoo]

thermoelectric to add another option, magoo

[varader]

...Ammonia make you feel great...:eek: i love that smell!!!;)

[Andy]

Pumped NH3
DX NH3 (chillers)
Pumped R22
DX R22, R134, R404, Propane
Pumped CO2 (with and without compressors on the CO2 stage...)

Mostly cold storage and distribution, tho recently lots of work with CO2 in data centers and and research labs.

BIG Recips, screws and recently Danfos"Turbocor" units.

The Turbocor @300KW refrigeration power is probably the smallest comp I see day to day. On NH3 1.5MW and more is common.

Hi Plank:)

I thought Turbocor was 134a only and that being semi the ammonia would eat the windings.

I assume you work for Star.

Kind Regards Andy:)

[Plank!]

Hi Plank:)

I thought Turbocor was 134a only and that being semi the ammonia would eat the windings.

I assume you work for Star.

Kind Regards Andy:)

Hi Andy
Ooops, should maybe have been a bit clearer in my post.:confused:
Yes the turbocor units are 134a only.
I ment to say that on Ammonia 1.5MW and above is common in our region.

You are of course correct, I do work for Star - London region service engineer:)

[get the gauges]

My general rule of thumb is ' If i can back the van up to within 10FT of the compressor, and my bahco's will undo it ,then i'm working on it.

[Andy]

Hi Andy
Ooops, should maybe have been a bit clearer in my post.:confused:
Yes the turbocor units are 134a only.
I ment to say that on Ammonia 1.5MW and above is common in our region.

You are of course correct, I do work for Star - London region service engineer:)

Hi Plank:)

IMO Building and the likes, there is a lot of Star NH3 plant on government buildings.

Kind Regards Andy:)

[PaulZ]

We work on pretty well anything but our main field is large commercial and industrial and do everything for some of our bigger clients.
Pumped NH3, Flooded NH3, DX NH3, DX HCFC, CFC, HFC, Air cond, Hi Wall splits, RAC's.
A lot of winery work, cold stores and just about anything in the food or manufacturing industry.
"Ah I love the smell of ammonia in the morning"

[Plank!]

Hi Plank:)

IMO Building and the likes, there is a lot of Star NH3 plant on government buildings.

Kind Regards Andy:)

IMO has been decommissioned while the place is renovated - for some reason the "government" is scared of NH3:confused:

The turbocor indigo/trox systems are taking off in a big way in the city - data centers and trading halls love them :D

Regards Steve:p

[FRIDGE]

hi i work on commercial and some industrial screw, scroll,recip and centrifugal water chillers. lot of powermaster chillers recently though, dont like them, poor quality:D

[Grizzly]

hi i work on commercial and some industrial screw, scroll,recip and centrifugal water chillers. lot of powermaster chillers recently though, dont like them, poor quality:D
Hi Fridge.
Welcome, powermaster chillers, not heard of them.
Who makes them? or where are they made?
thanks Grizzly http://www.refrigeration-engineer.com/forums/images/icons/icon14.gif

[absolute-zero]

Greetings everyone,

I service Transport refrigeration equipment, TK Carrier mostly.

These units can be utilizing refrigerants HFC,HCFC,HFC

R-12
R-500
R-502
R-69L
R-401B (MP66)
R-402a (HP80)
R-134a
R404a
R407c

I have seen other refrigerants used in these machines but were not recomended by Factory.

Regards A-Z

[absolute-zero]

Hi Fridge.
Welcome, powermaster chillers, not heard of them.
Who makes them? or where are they made?
thanks Grizzly http://www.refrigeration-engineer.com/forums/images/icons/icon14.gif


I have never serviced a chiller, but am under the impression, that is a very low pressure system, running deep vacuums in the lowside and a maximum of 10 psi on the high side. Form what i have read in low pressure systems they are equiped with purging valves to allow contaminates to be released, that enter through lowside gaskets and seals.

Am I correct to assume this?

A-Z

[Pooh]

A-Z
you are talking about centrifugal chillers that mainly ran on R11, any refrigeration system that chills a secondary refrigerant tends to be called a chiller. These systems can use any of the refrigerants available from ammonia to propane and anything else you can think of.
Chillers are mainly used in the air conditioning and process cooling applications were it is not always viable financially or mechanically to use flooded or direct expansion systems.

Ian

[absolute-zero]

A-Z
you are talking about centrifugal chillers that mainly ran on R11, any refrigeration system that chills a secondary refrigerant tends to be called a chiller. These systems can use any of the refrigerants available from ammonia to propane and anything else you can think of.
Chillers are mainly used in the air conditioning and process cooling applications were it is not always viable financially or mechanically to use flooded or direct expansion systems.

Ian

Interesting:rolleyes:

[TXiceman]

A-Z
These systems can use any of the refrigerants available from ammonia to propane and anything else you can think of.
Chillers are mainly used in the air conditioning and process cooling applications were it is not always viable financially or mechanically to use flooded or direct expansion systems.

Ian


Ian, I have never seen a centrifugal operating on ammonia. Centrifugals usually operate on the lighter density gases like most of the hydrocarbons and the lighter "Freons". Ammonia is generally considered to heavy for a centrifugal.

In the next paragraph, I presume you are referring to a glycol system as a secondary coolant rather than direct cooling such as a flooded or DX exchanger.

Ken

[TOTTIHS]

Just stopped working on R11 centrifs a few months ago with a tear in my eye & a sweet smell in my nostrils

[richardb14]

Cascade, autocascade and geothermal systems

[Oregon Jim]

I operate single stage and two stage ammonia refrigeration in a food processing facility, and have prior experience operating a cryogenic system used to separate hydrogen and methane gasses in a oil refinery.

[SteinarN]

Mostly DX HFC systems, some chillers, AC, and transport refrigeration, TK and Carrier. Some metal work, stainless, welding.

[Chunk]

During my apprenticeship i worked with nh3 plant,r11 a/c systems and a giant diesal engine test plant that ran down to -100c on r13b1 which gave me a month off work from inhaling that stuff.

But now i`m out in the big wide world looking after 4 supermarket stores cleaning filters and spending most of my days leak testing and trying to keep the cheap equipment going for another year.

Depressing.But they pay me far too much.:D

[Harold T Paul]

I have designed and sold Industrial Refrigeration Systems for 30 plus years. 99% are NH3

[Harold T Paul]

I am new at RE. I can reply to posts but have no idea and for the life of me can't figure out how to start a new post? Any help would be appreciated.

[nike123]

Go to forum of appropriate theme and near the top of page you could find icon New thread.

[US Iceman]

Is this the Harold Paul from the West Coast?;)

[abet_meneses]

work in the past with dx system reefer van,trucks,commercial and supermarket refrigeration,gravity and overfeed NH3 system.

[abet_meneses]

work in the past on dx system marine and transport refrigeration,commercial and supermarket refrigeration and gravity and liqiud overfeed system and some A/C units.

[Magoo]

Specialized stuff, NH3, 400Kw refrig at -60kpa, 3 tonnes product outfeed per hour, 2 stage NH3.
Currently in China, freaking smog is horrendous, visibility is less than one Km. Who would be a fridgy working international.
magoo

[ptsac]

These days mostly Italian air cooled chillers, some recip, some screw and occasionally Turbocor compressors. Previously McQuay centrifugals

[casstrig]

Well basiclly I work on whatever comes my way,although I havent woked on nh3 systems.I have woked on centrifugal chillers using r11,and r12 cascade systems for electronic testing chillers of all capacities and types,also on swro reverse osmosis plant and lithium bromide chillers.