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Need help to find a steam compressor

  1. May 15, 2016 #1
    At present, I am looking for a steam compressor or steam compressor system that can compress very low pressure steam (2.56 kPa) to 1 bar and above. I know well that such high compression ratio will be impossible for a single set to achieve, therefore it more than one sets have to set in series that's welcome too.
    To be precise, I am looking for steam compressor system(s) that can compress steam as said above. Such sets were and still are used in open cycle and/or hybrid OTEC plants.
    If anybody can refer a company that can manufacture such sets, I will be grateful to him/her.
     
  2. jcsd
  3. May 15, 2016 #2
    I am not sure, but you might try Alibaba.com/showroom/steam-compressor.html
     
  4. May 15, 2016 #3
    Thanks! I have tried them but they aren't worth the effort. Most of them are in the field of higher pressure steam compression i.e. moe than one bar is the starting pressure.
     
  5. May 17, 2016 #4

    jim hardy

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  6. May 17, 2016 #5

    Nidum

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  7. May 17, 2016 #6
    Both TLV and Spilling deal with higher pressure steam. They don't deal with such low pressure steam.
     
  8. May 17, 2016 #7

    jim hardy

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    Are you removing air from a condenser ?
    It takes a lot of mechanical work to compress a gas. That's why we condense the steam before pumping it back up to boiler pressure.
    Probably you know better than to contemplate an over unity steam system.

    The links i gave you came from searches on "condenser air ejector" and "eductor"
    which turn up plenty of other manufacturers.
     
  9. May 17, 2016 #8
    I want something similar to used in open cycle OTEC experiments like http://www.otecnews.org/articles/vega/07_landbased_OTEC.html [Broken]. Kindly look at the compressor system fitted to the Condenser of this experiment.
     
    Last edited by a moderator: May 7, 2017
  10. May 17, 2016 #9

    jim hardy

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    http://www.otecnews.org/articles/vega/07_landbased_OTEC.html [Broken]
    returns
    upload_2016-5-17_19-56-22.png
     
    Last edited by a moderator: May 7, 2017
  11. May 17, 2016 #10
  12. May 17, 2016 #11

    jim hardy

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    Hmm not a lot to go on there
    and that's all they tell us about it ?
    Clearly it's rotating machinery
    and it's for venting noncondensibles.
    in my plant we used a three stage steam eductor
    but we never had 4°C seawater, maybe 15°C for a day in a severe winter . So we had higher absolute pressure.

    I would call a sales rep for such machinery , ask him for a brochure on what he sells ,
    Tell him you're looking for a ~100hp condenser air ejector that'll pump from saturation at 4°C to atmosphere.
    I didn't see a mass flow rate for anything but cooling water to the intercooler and that'll probably be his first question.

    In my plant we had a visit from a Nash salesman pushing water ring compressors for air ejector duty.
    But why would we trade a simple steam jet eductor with no moving parts for a complex rotating machine that has bearings, seals, motors and electrical controls to maintain ?

    Sorry i can't help more.
    I've heard of other plants that use Nash water ring compressors for that application . Any manufacturer's sales rep should be more than happy to help you spec a suitable machine.

    old jim
     
  13. May 18, 2016 #12
    Not only non-condensables, but also the non-condensed steam too that is 5% of the steam produced at the Evaporator. I don't want something that can compress steam from 5C level, 20C level will be enough for me. I have contacted a few manufacturers but all said that the pressure level (20C saturation pressure level) is too low for them to manufacture anything even if that means putting more than one machine in series.
     
  14. May 18, 2016 #13

    jim hardy

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    Well sure, that's why there are intercoolers and vent condensers to recover that heat of vaporization.

    Chalk them of your list. Either they dont have what you need or the sales reps aren't helpful enough. Part of that job is educating customers.
    Search on keywords from links like these to teach your search engine where are the right social circles.

    http://www.graham-mfg.com/usr/pdf/TechLibVacuum/218.PDF

    http://www.fluid-technology.com/product/ejectors-and-condensers/

    http://spxheattransfer.com/products/detail/steam-jet-air-ejectors
     
  15. May 18, 2016 #14
    Ejectors or eductors aren't my preference. They use more steam than they produce. I prefer mechanical means like MVC (Mechanical Vapour Compression) or MVR (Mechanical Vapour Recompression).
     
  16. May 18, 2016 #15

    jim hardy

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    call Nash.
     
  17. May 18, 2016 #16
    I want to mean the steam they produce by evaporating in vacuum. And, by the way, who is Nash?
     
  18. May 18, 2016 #17

    jim hardy

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  19. May 19, 2016 #18
    Thanks! I have contacted them and hope to get some reply. In the meantime, if you know some other sources, kindly send that to me.
     
  20. May 21, 2016 #19
    I have contacted them but don't get any reply so far.
     
  21. Aug 14, 2017 #20

    Mech_Engineer

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    This thread is dead, the last post was more than a year ago and it looks to me like the OP has been banned.
     
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