1.5 HP single-stage = -62*C @ 225W

Hi

It's mine next STRONG Single-stage ..next after that one : http://www.xtremesystems.org/forums/...d.php?t=144781, almost same specs, compressor is exact same model, this time I have finally got -62*C@225W, so 4*C improvement :D .

Specs :

Compressor: HITACHI CHV33YC6-U - it's "tiny" 18000 BTU/ 1.5 HP rotary ;)
evap: steeper 40mm tall/40 mm diammeter
XV: captube 0.8 mm
condenser: 3 row, cooled by one 200mm/230V 5W fan
Refrigerant : R507+R410a blend
Case : Zincked plate 50 x 40 cm baseplate
Others : SLHX - 15mm with 1/4' inside, around 50 cm long

http://www.members.lycos.co.uk/piotres2/strong_ss/1.jpg

http://www.members.lycos.co.uk/piotres2/strong_ss/2.jpg

http://www.members.lycos.co.uk/piotres2/strong_ss/3.jpg

http://www.members.lycos.co.uk/piotres2/strong_ss/4.jpg

http://www.members.lycos.co.uk/piotres2/strong_ss/5.jpg

Finally I must change 4x 120mm Delta fans for one 200mm/230v fan with big shroud, becasue that power supply for fans wasn't working OK and damaged Deltas :( . Also power switch wasn't working OK, so finally owner has lovely, green button :p: .

http://www.members.lycos.co.uk/piotres2/strong_ss/6.jpg

Insulation on all pipes is 18mm thick :D .

http://www.members.lycos.co.uk/piotres2/strong_ss/7.jpg

http://www.members.lycos.co.uk/piotres2/strong_ss/8.jpg

http://www.members.lycos.co.uk/piotres2/strong_ss/9.jpg

And finally -62*C@225W :yepp: . I haven't checked unloaded, but I think it's lower than -70*C :) .

Best Regards
Peter

Damn that's a nice unit. Think you could use a bigger compressor? :p:

Sure I can use 28000 BTU/2.5 HP :D . I think it's the biggest 230V rotary. With it I hope for lower than -65*C@225W ;) .

Dry Ice temps in a single stage! Very nicely done Piotre!

That's overkill pete :/. You can reach these temp with autocascade using half-sized compressor. You'll kill this baby using it this way. But anyway, that's to see such results :D

Great work, :D

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Originally Posted by K404

Dry Ice temps in a single stage! Very nicely done Piotre!

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Although I rekon using a single-stage like this might work out more expensive than just buying some dry-ice and a pot. Not 100% sure on this but you can bet anything that electricity in the UK is a rip-off! I don't pay the house bills but I have some 2hp compressors that we rekon will cost about £2/hour to run each :eek: .

Nice unit though!

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Originally Posted by Brettbeck

Although I rekon using a single-stage like this might work out more expensive than just buying some dry-ice and a pot. Not 100% sure on this but you can bet anything that electricity in the UK is a rip-off! I don't pay the house bills but I have some 2hp compressors that we rekon will cost about £2/hour to run each :eek: .

Nice unit though!

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Getting Dry Ice locally (Glasgow) is a no-go, so i`m paying £52 delivered for 10Kg. If I had a unit like that and used it only for benching, i`d probably save money in the long term.

I've still to try actually using my BOC account though, so it might be cheaper there.

Plus...cant compete- a phase unit is a lot easier to work with than Dice... I bench alone, so things like getting a sandwich or going to the toilet stop being simple tasks!! :p:

you are the fastest builder here :) Nice job.

Nice!!

Heh you've got a 2.5 hp max, I'm sure you can find something better then a single stage to do with that though ;) ;)
In USA we have a 1.25 hp max as far as I've seen otherwise the power consumptions too high (damn 110vac)

Very nice! Tell me why without case?

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Originally Posted by n00b 0f l337

Heh you've got a 2.5 hp max, I'm sure you can find something better then a single stage to do with that though ;) ;)
In USA we have a 1.25 hp max as far as I've seen otherwise the power consumptions too high (damn 110vac)

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You can find more than 10hp in france (230v AC - 1ph). These power are ridiculous compared to those used in industrial refrigeration (I've calculated a cold room that needed more than 400kW under -25° :D )

LBP Scroll is the best for our use, with a COP still over 1 even under -45° and up to 3kw (from 600w to 3kw as I remember, 230v AC). The main problem is that we can't find them as easily as rotaries :/

10hp.. = 7,6kw.. not possible to run on swedish 1ph, limit is 16a (~3,7kw)..

[edit]
3,7kw not 2,3kw as written before.

Quote:

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Originally Posted by K404

Getting Dry Ice locally (Glasgow) is a no-go, so i`m paying £52 delivered for 10Kg. If I had a unit like that and used it only for benching, i`d probably save money in the long term.

I've still to try actually using my BOC account though, so it might be cheaper there.

Plus...cant compete- a phase unit is a lot easier to work with than Dice... I bench alone, so things like getting a sandwich or going to the toilet stop being simple tasks!! :p:

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As soon as you said you paid £52 for 10Kg BOC sprung to mind :D. BOC are great don't get me wrong.... but with them it's either the best, or nothing at all. You can't beat the quality of their products... only the prices :D.

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Originally Posted by Clemmaster

You can find more than 10hp in france (230v AC - 1ph). These power are ridiculous compared to those used in industrial refrigeration (I've calculated a cold room that needed more than 400kW under -25° :D )

LBP Scroll is the best for our use, with a COP still over 1 even under -45° and up to 3kw (from 600w to 3kw as I remember, 230v AC). The main problem is that we can't find them as easily as rotaries :/

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You can get far more than 10hp compressors in lots of places :confused: .

nice job and impressive single stage :up:

This is REALLY impressive on R507/410a! Great Job Piotres! I love your work!

quick ot: would a 507/410a blend work in a high hp recip compressor?

Hi

THANKS THANKS THANKS :D

@Masell : without case becasue owner don't need it ...but case is no problem, sure ;) .

@Fhqwhgads6680 : I only recomend to use R410a in R407C or R404a/R507 type compressor (even in blend). Even "one hose" of R410a make discharge pressure more than 1.0 bara higher in load :shrug: .

Regards
Peter

really sweet build man..dam

Holy cow.. imagine using that beast for an autocascade. I'm sure it would also love life a bit more, can't imagine it receiving enough mass-flow to keep it happy. How loud is it and what pressures are you running on it?

Quote:

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Originally Posted by n00b 0f l337

In USA we have a 1.25 hp max as far as I've seen otherwise the power consumptions too high (damn 110vac)

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Yeah, it's too bad homes here don't have something fun like 220 3 phase, or better yet 480 3 phase:p: Then again that shock from the toaster. :eek:

Amazing temps from a single stage, nice job.

i have a machine with similar spec .>> rotary of that sort of size with R290 and 0hg but the temps are waaaaaaaaaay higher than that........

how the hell is it possible to have another 15-20C loaded drop with that sort of heatload............from what kayl was talking about i didn't think that was possible unless you are running 20hg low side

Quote:

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Originally Posted by n00b 0f l337

Heh you've got a 2.5 hp max, I'm sure you can find something better then a single stage to do with that though ;) ;)
In USA we have a 1.25 hp max as far as I've seen otherwise the power consumptions too high (damn 110vac)

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Depends what you mean by to high, 230v wont get your power usage any lower, just amperage. I've seen 1.5HP 115v motors, and even heard of some 2HP ones. If you really want to push it, you *could* fit upto 2.5-2.8HP on a 20 AMP 115 circuit, and around 1.5-1.8 on 15 Amps.

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Originally Posted by Scimitar

Yeah, it's too bad homes here don't have something fun like 220 3 phase, or better yet 480 3 phase:p: Then again that shock from the toaster. :eek:

Amazing temps from a single stage, nice job.

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I for one have made mistakes many times before and shocked myself on our mains @ 240v :rolleyes: .

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Originally Posted by dinos22

i have a machine with similar spec .>> rotary of that sort of size with R290 and 0hg but the temps are waaaaaaaaaay higher than that........

how the hell is it possible to have another 15-20C loaded drop with that sort of heatload............from what kayl was talking about i didn't think that was possible unless you are running 20hg low side

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R290 or propan gas? The propan we can find here in France is way from being pure and it isn't able to carry any load at good temperatures...

@Fhqwhgads6680 : Never use pure R410a in System like ours, runing like you guys do with you rotaries is overkill but Runing with R410a and these pressures would be suicide...

^^
Some people want it for a few degrees lower BP, don't care about the pressures

Speaking of impure propane...is there any way to synthesize propane in order to get a more refined, more pure gas for our systems? I’m guessing this is a project for a much larger lab but I thought I’d ask anyway…there are a lot of good minds on this forum.

Just buy r290 propane from refrigeration stores, that will be pure.

LPG propane which most people use is about 95% pure, but it's allways worked fine for me.

Not under load for us :/

Unloaded temps are really great ...

Quote:

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Originally Posted by Clemmaster

Not under load for us :/

Unloaded temps are really great ...

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Were you referring to my post? Maybe your r290 is a propane/butane mix... in which case it would explain poor loaded temps.

No because pressures/temperatures mach to propane...

How long cap you use those temps? Can you tell what kind of mix was ref, fifty sixty, or something :D

Quote:

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Originally Posted by Clemmaster

Not under load for us :/

Unloaded temps are really great ...

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i find bbq grade r290 fine for personal cascade ;) holding load of second stage fine when HX flooded
also single stages as well, its not as good as other refrigerants though like r507, 4040a etc but is better than r134a for sure

For sure in our applications, but it's far from having the same cooling capacity like R507c, even if pressures are lower. R290 maybe a good refrigerant (according to data on R290 compressors) but propan gaz we find in France in tankstations are far from being pur ^^

Quote:

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Originally Posted by Clemmaster

For sure in our applications, but it's far from having the same cooling capacity like R507c, even if pressures are lower. R290 maybe a good refrigerant (according to data on R290 compressors) but propan gaz we find in France in tankstations are far from being pur ^^

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the Lpg used in cars is around 50% butane / propane which would result in a low pressure gas, but not very cold blend.
The best gas to get is from camping stores used for gas lights and bbq's.

No I'm not talking about GPL (LPG for you :p), the blend we put in our car that are called liquid petrol gaz, but propane bottle (13kg) we use here to heat food when we're not using Butane or don't have natural gaz at home :)

Quote:

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Originally Posted by Pansuu

How long cap you use those temps? Can you tell what kind of mix was ref, fifty sixty, or something :D

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Hello

Captube is around 240-250 cm of 0.8 mm. :)

Mix is sth like R507=90% and R410a=10%.

Regards
Peter

That's a well sized captube \o/

:up: hey mate thats like everryone says a nice build , but i really likethe neatness in the insulation so tidy in wrapping all them pipes up..must be tuff task having to insulate builds like these and a cascade.

Quote:

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Originally Posted by piotres

Hello

Captube is around 240-250 cm of 0.8 mm. :)

Mix is sth like R507=90% and R410a=10%.

Regards
Peter

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Ok, thanks mate. You have really good temps there :)

Can you remember lowside preasure in load?

Quote:

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Originally Posted by Pansuu

Ok, thanks mate. You have really good temps there :)

Can you remember lowside preasure in load?

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THX :p:

No I don't remeber pressures :( .