New Trane S-Series CenTraVac

[Nuclrchiller]

Well, whatta ya know. Smug mode .... I noticed there is no mention of what refrigerant is used.

[Nuclrchiller]

It kinda makes me think of a CVHF with the second stage turned around and moved out to the other side of the rotor. And then heavily modified for higher speeds. VFD, large nose cones on the impellers, permanent magnet motor. Wonder what changes to the vane assemblies.

[Screwit]

Is that attachment (and you) talking about using R245fa liquid/vapor in a "steam" plant to generate electricity, as opposed to using water/steam? If so, I've never heard of such a thing. I've also never heard the term "Organic" Rankine Cycle.

Correct, the "organic" rankine cycle involves heat transfer to a secondary fluid (refrigerant) with a lower boiling point than the the water/steam phase to drive the turbine allowing for the recovery of lower grade heat to generate electricity

Nuclrchiller I could not get your link to work but would be very interested to see information on the S_Series_S

[Nuclrchiller]

I "Googled" "Trane Series S CentraVac" and that result was on the first page. I'll try to email it. There were more results, but I was short on time to look at them. I appreciate the info on the organic rankine cycle. I'm adding it to the list of things I intend to investigate further.

[Nuclrchiller]

It kinda makes me think of a CVHF with the second stage turned around and moved out to the other side of the rotor. And then heavily modified for higher speeds. VFD, large nose cones on the impellers, permanent magnet motor. Wonder what changes to the vane assemblies.

The "higher speeds" is speculation on my part, I think. I can't remember if I read that about the chiller or about permanent magnet motors in general. That is just one advantage of that type motor. I reread Screwit's earlier post with that link. I can't find anything about the chiller that mentions high speed. I am curious about the "mixed flow" impeller design.

[R123]

The "higher speeds" is speculation on my part, I think. I can't remember if I read that about the chiller or about permanent magnet motors in general. That is just one advantage of that type motor. I reread Screwit's earlier post with that link. I can't find anything about the chiller that mentions high speed. I am curious about the "mixed flow" impeller design.

The chiller is a high speed design. That's why they all will come with Adaptive Freaquency Drives.

[Nuclrchiller]

Thanks, R123. I couldn't remember if I had read that somewhere, or had presumed it from the permanent magnet motor and/or the drive. I was thinking of York's air cooled screw chiller with a single drive spinning multiple compressors at high speed. Do you know what is meant by "mixed flow" impeller design? How about "specific speed"? Thanks.

[the007]

the new "S" will be geared, hence high speed. oil-less. small tonnage for the intial run 250-400 tons with a footprint to go through double doors. ceramic bearings which a 5lb maul didn't even mark up or dent. only 4 will be made this year and sold, then produciton will ramp up and grow into bigger tonnages after that. i've some proprietary stuff on this, so you didn't hear it from me.....

[KnewYork]

the new "S" will be geared, hence high speed. oil-less. small tonnage for the intial run 250-400 tons with a footprint to go through double doors. ceramic bearings which a 5lb maul didn't even mark up or dent. only 4 will be made this year and sold, then produciton will ramp up and grow into bigger tonnages after that. i've some proprietary stuff on this, so you didn't hear it from me.....

That's interesting about the gears. York, who has always been internally geared, took the gears out of the YMC2 and overspeed with the drive. I think they can run in the 240-300Hz range.

[R123]

the new "S" will be geared, hence high speed. oil-less. small tonnage for the intial run 250-400 tons with a footprint to go through double doors. ceramic bearings which a 5lb maul didn't even mark up or dent. only 4 will be made this year and sold, then produciton will ramp up and grow into bigger tonnages after that. i've some proprietary stuff on this, so you didn't hear it from me.....

I don't know where your getting your info from but they are NOT geared and initial tonnage is up to 700 tons

[the007]

well, "heavy metal" must've mis-spoke on the sizes....

[Nuclrchiller]

Yeah, the pictures and the animation released so far show that it's not geared. I haven't seen anything showing capacity outside the "180-390 tonnage range". I see the attachment on an earlier post of mine is no good. It is a pdf from Trane's site I found thru Google. It was on the first page of results for "Trane Series S Centravac".

[Tech Rob]

Direct drive, 180-390 tons.

[Healey Nut]

Direct drive, 180-390 tons.

Ditto ... low pressure to .

[desto1]

was in la crosse and was told they are direct drive so no gears. also was told one needs to becareful with wrenches around the motor because the magnets have a 500 lb pull and could be bad for the fingers.

[Tech Rob]

was in la crosse and was told they are direct drive so no gears. also was told one needs to becareful with wrenches around the motor because the magnets have a 500 lb pull and could be bad for the fingers.

So I guess we'll all need to get some stainless steel wrenches and aluminum sockets!

[Nuclrchiller]

I have heard that it is low speed, and will use R123, but is compatible for the new refrigerant (R245fa?).

[aaron604]

Looks like a bench grinder with a paint job, is it same old trane junk that you've gotta glue together with loctite?

[milkyway]

Ouch Arron!

This is will interesting to see what happens in the future though, I believe this is the first oil free machine that Trane has developed, . The oil free seems to becoming more common in the centrifugal market, Trane needed and did come out with the oil free system to compete in the oil free market. And I love the small footprint !!!
Only available in the 200 to 400 ton range as of now.

[aaron604]

By the time this unit hits the market the oil free will be a thing of the past