Need help to find a steam compressor

[pranj5]

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.

 

[TheQuietOne]

I am not sure, but you might try Alibaba.com/showroom/steam-compressor.html

 

[pranj5]

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.

 

[jim hardy]

Penberthy eductors
http://flowfactor.com/penberthy_jet_pumps.htm
Nash liquid ring pumps
http://www.gdnash.com/classic_pumps_compressors/

 

[Nidum]

http://www.spilling.info/applications-steam/steam-compression.html

http://www.tlv.com/global/TI/product-solutions/steam-compressor-sc.html#1

But why do you want to do this ?

 

[pranj5]

Both TLV and Spilling deal with higher pressure steam. They don't deal with such low pressure steam.

 

[jim hardy]

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.

 

[pranj5]

I want something similar to used in open cycle OTEC experiments like http://www.otecnews.org/articles/vega/07_landbased_OTEC.html . Kindly look at the compressor system fitted to the Condenser of this experiment.

 

[jim hardy]

http://www.otecnews.org/articles/vega/07_landbased_OTEC.html . Kindly look at the compressor system fitted to the Condenser of this experiment.

http://www.otecnews.org/articles/vega/07_landbased_OTEC.html
returns

 

[pranj5]

http://www.otecnews.org/portal/otec-articles/ocean-thermal-energy-conversion-otec-by-l-a-vega-ph-d/
You can find it out at No. 7.

 

[jim hardy]

Hmm not a lot to go on there

The basic compressor system has four stages with direct contact coolers in-between. The fourth stage compressor takes the non-condensables from the third stage. The discharge from the fourth stage is re-injected at 30 kPa into the warm water effluent returning from the second stage evaporator. A fifth stage compressor is also provided to alternately bypass the re-injection scheme and discharge into the atmosphere. The first four stages are centrifugal, whereas the fifth stage is a positive displacement type.

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

 

[pranj5]

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.

 

[jim hardy]

Not only non-condensables, but also the non-condensed steam too that is 5% of the steam produced at the Evaporator.

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

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

Chalk them of your list. Either they don't 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

 

[pranj5]

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).

 

[jim hardy]

Ejectors or eductors aren't my preference. They use more steam than they produce.
They don't produce any .
I prefer mechanical means like MVC (Mechanical Vapour Compression) or MVR (Mechanical Vapour Recompression).

call Nash.

 

[pranj5]

I want to mean the steam they produce by evaporating in vacuum. And, by the way, who is Nash?

 

[jim hardy]

And, by the way, who is Nash?

brochure
http://www.gdnash.com/engineered_systems/condenser_exhauster_systems/
condenser air removal introductory overview
www.gdnash.com/condexhbroch/

 

[pranj5]

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.

 

[pranj5]

I have contacted them but don't get any reply so far.

 

[Mech_Engineer]

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