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  1. #1
    Join Date
    Feb 2008
    Location
    Dubai
    Posts
    116

    Confused replacing the air cooled to centrifugal chiller.

    Dears,

    We are planning to withdraw our 14 year old TRANE RTAA chiller 456 ton capacity (2 No chiller, each 228 ton total 456 ton,unit model RTAA 328) and replace with either same like air cooled chiller or new water cooled centrifugal chiller. We are advised by Mitsubishi to install ETI series 450 ton centrifugal chiller and the water cooled system shall have a power consumption of 0.8 KW against 1.6 KW the existing trane chiller. The additional investment of water cooled system can cover and pay back within 2.3 year by analyzing the local electrical and water cost. I would be interesting your valuable opinions,
    1. Is better to replace same brand air cooled chiller
    2. Comparison the centrifugal chillers of trane vs York vs Mitsubishi vs carrier.

    Regards
    Moideen-dubai

  2. #2
    Join Date
    Jul 2011
    Location
    East coast USA
    Posts
    976
    my two cents, factor in chemical treatment and PM maintenance on all equipment to support this. But the pay back on either one is good.

  3. #3
    Join Date
    Jun 2009
    Location
    Upstate SC
    Posts
    1,439
    Water treament will be a major focus. If preventative maintenance is an issue go air cooled. Much easier to clean coils then brush out condenser barrels.

    Sent from my ERIS using Tapatalk 2

  4. #4
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    2,104
    Quote Originally Posted by jdblack View Post
    Much easier to clean coils then brush out condenser barrels.

    Sent from my ERIS using Tapatalk 2
    That's a matter of opinion.

  5. #5
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    5,847
    Quote Originally Posted by Nuclrchiller View Post
    That's a matter of opinion.
    X2

  6. #6
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,664
    Quote Originally Posted by Nuclrchiller View Post
    That's a matter of opinion.
    X3

  7. #7
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,664
    Cost to go watercooled from aircooled is a big expense... Tower, pumps, building etc. me personally would put in a couple Rtac's and never skip a beat

  8. #8
    Join Date
    Jan 2005
    Location
    Houston TX
    Posts
    876
    moideen- One other thing to think about you could cut down on your maint. cost by using a McQuay WMC. There is no oil and KW/ ton is a lot better then .80, something to think about. -GEO
    Once in a while everything falls into place and I am able to move forward, most of the time it just falls all over the place and I can't go anywhere-GEO

  9. #9
    Join Date
    Jan 2011
    Posts
    1,190
    Quote Originally Posted by ga1279 View Post
    One other thing to think about you could cut down on your maint. cost by using a McQuay WMC. There is no oil and KW/ ton is a lot better then .80, something to think about.
    I think he's referring to total system kW. A York YK with VSD will do a whole lot better than .8 kW/ton as well. I think one of the problems with a Turbocor compressor in Dubai is the likelihood that it would run a full load more than it may here in the States. Turbocor compressors don't perform as well at full load as many of their competitors.

  10. #10
    Join Date
    Jun 2009
    Location
    Upstate SC
    Posts
    1,439
    Quote Originally Posted by Nuclrchiller View Post
    That's a matter of opinion.
    Okay let me rephrase --- not easier as much as less skilled labor needed

    Hows that

    Sent from my ERIS using Tapatalk 2

  11. #11
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,664
    Quote Originally Posted by jdblack View Post
    Okay let me rephrase --- not easier as much as less skilled labor needed


    Hows that

    Sent from my ERIS using Tapatalk 2
    Pokin fun here but it doesnt take a genius to punch tubes.

  12. #12
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    4,438
    Quote Originally Posted by Southern Mech View Post
    Pokin fun here but it doesnt take a genius to punch tubes.
    it is hard to clean tubes wrong...it is very easy to clean a condenser coil wrong and screw the whole thing up...

    what are we up to now? X6?
    How to make the perfect "Half-Hitch" knot or any other boyscout knot in 3 easy steps...

    1. Remove your meter leads from the meter and very carefully return them to their storage case or bag.
    2. Wait 2 seconds
    3. Very carefully remove your meter leads from their storage place and enjoy your new knot!

  13. #13
    Join Date
    Jun 2009
    Location
    Upstate SC
    Posts
    1,439
    Quote Originally Posted by jayguy View Post
    it is hard to clean tubes wrong...it is very easy to clean a condenser coil wrong and screw the whole thing up...

    what are we up to now? X6?
    You guys just love to argue. Evidently youve never seen someone try to beat a bore brush through a tube and bust it. You think its easy because you have a tube machine and skills. Take a half wit with an adjustable and some rods and brushes and have at it. Good luck

    Sent from my ERIS using Tapatalk 2

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