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  1. #40
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    Attachment 362411 Hope this works. I have a hard time with this computer stuff ....

  2. #41
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    Well, whatta ya know. Smug mode .... I noticed there is no mention of what refrigerant is used.

  3. #42
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    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.

  4. #43
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    Sep 2008
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    Quote Originally Posted by Nuclrchiller View Post
    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
    Attached Images Attached Images
    Necessity is the mother of invention

  5. #44
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    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.

  6. #45
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    Quote Originally Posted by Nuclrchiller View Post
    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.

  7. #46
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    Quote Originally Posted by Nuclrchiller View Post
    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.

  8. #47
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    Aug 2009
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    Prattville, Alabama
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    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.

  9. #48
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    Feb 2008
    Location
    Ringgold GA
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    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.....

  10. #49
    Join Date
    Jan 2011
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    1,223
    Quote Originally Posted by the007 View Post
    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.

  11. #50
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    Quote Originally Posted by the007 View Post
    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

  12. #51
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    Feb 2008
    Location
    Ringgold GA
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    well, "heavy metal" must've mis-spoke on the sizes....

  13. #52
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    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".

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