Moisture Eliminator/Exh. Louver Sizing-Offshore application
Moisture Eliminator/Exh. Louver Sizing-Offshore application
(OP)
Dear Friends
Could someone please advice that what kind face velocities are generally considered for sizing Exhaust Louvers and Moisture Eliminators at air intakes
Iam concerned about Noise and pressure drop. Is 6 m/s face velocity is good enough.
Any information about any supplier specific website with noise and pressure drop data would be higly appreciated
We have follow Norsok S-002 with very strict noise requirements
Could someone please advice that what kind face velocities are generally considered for sizing Exhaust Louvers and Moisture Eliminators at air intakes
Iam concerned about Noise and pressure drop. Is 6 m/s face velocity is good enough.
Any information about any supplier specific website with noise and pressure drop data would be higly appreciated
We have follow Norsok S-002 with very strict noise requirements





RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
Not familiar with your standards, but the more resistant to water the more resticitive.
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
http://www.greenheck.com/products/louvers/
http://www.ruskin.com/louvers/
6 m/s velocity at an intake louver is more than twice what I would want to see. At an exhaust louver it may not be so bad.
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
I have further investigated this matter and to my surprise that in few of the old offshore projects specifically drill ships, designers have considered upto 8m/s.
My main concern is Noise. For offshore projects there are some very strict noise requirements from norwegian authorities. Are there some graphs or charts avaialble where we can see relation between velocities and noise. Pressure drop is not a problem.
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
Mike Halloran
Pembroke Pines, FL, USA
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
Those are my favourite manufacturers chas, the most common louver I use is Ruskin's EME6625D, it is Dade County approved for 'large misslie impact' and it somewhat resistant to wind driven rain, but if there is a hurricane all bets are off, it becomes blowing steam and a lot of water gets through.
The ruskin submittal is h
Just trying to emphasize to the Original Poster that it is important to verify how louvers are rated, and to look at the free area of the louver and not just a face velocity. The free area velocity will be a lot higher than the face velocity.
Greenheck makes a vertical blade louver that is more resistant to wind driven moisture than the EME 6625D however to the best of my knowledge it is not certified to the large missile impact test I need down here.
The test is to with stand three consecutive hits of a 2x4 at 35 mph. I always hear the rumour that at 55 mph, a 2x4 will penetrate concrete block.
Greenheck is a first class company in my opinion and if the local representative ever offers you a factory tour in Wisconsin, it is well worth the trip. I found their kitchen ventilation demonstration to be quite informative.
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
If you have dissimilar metals exposed to that air you will get corrosion. There are many coatings for heat transfer coils but they ultimately fail.
The most successful type of coil that I have seen here is the all aluminum spinefin coil, originally used by GE and since incorporated into the small American Standard and Trane line of air cooled condensers. Be 6 tons and smaller nominal capacity only, I wish larger equipment was made with spinefin.
Seen copper tubes/copper fin coils fail miserably as well however I suspect a slightly different grade of metal used in the fins compared to the tubes as well as the proximity of a 'bad' over head electrical service.
Example of a Bronz Glow coating that did fairly well, they have since revised the paint they used to stencil on their logo.
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
Thanks for the valuable information. I tried to search Ruskin Website for Moisture eliminators but It seems it is not in their product range.
Do you have any similar information for Moisture Eliminator with a Coalescer Pad. We have only moisture Eliminators with a Coalscing pad at inlet.
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Moisture Eliminator/Exh. Louver Sizing-Offshore application