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  1. #66
    Join Date
    Jan 2007
    Location
    Pittsburgh
    Posts
    181
    Quote Originally Posted by RickCyin View Post
    I have done experiment on my home a/c unit.

    I went to Home depot and purchase water mist system for your porch they use this thing on desert areas.
    So I had bright idea that if i install this guys around my condenser unit and when compressor comes on it turns on mist. i figure it cools condenser faster help compressor work less hard.
    but that’s not the case, when mist turns on my supply air temp went up instead i expected temp. should go down.

    Is this normal or I'm missing something here, I know theory of how a/c works.
    Please someone explain. Thanks.
    OMG dont do that

  2. #67
    Join Date
    Dec 2011
    Location
    bedford ind
    Posts
    1,092
    Robo, are u saying you use condensate? Or are you trying to make a point?
    Last edited by ironpit; 04-08-2013 at 09:23 PM. Reason: I dunno

  3. #68
    Join Date
    Dec 2009
    Location
    Bristol NH
    Posts
    229
    How come the minerals or TDs does not plate out when misted into the air flow? Is it just cooling the air before it goes through the condenser? How do you keep the water from hitting the coil?


    Sent from my XT907 using Tapatalk 2

  4. #69
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,974
    Quote Originally Posted by boilerman856 View Post
    I agree Condensate definitely would better than spraying hard ground water on warm aluminum coils. How do you distribute the water over the coil? Do you use a condensate pump?

    Sent from my XT907 using Tapatalk 2
    I just run the condensate line to the top of the coil, beneath the top of the unit and let it dump out over the coil. If the unit is running when the condensate pump discharges, the condensate pretty much stays with the coils.

    It would certainly be easy enough to distribute the condensate more effectively by plugging the end of the tube and drilling small holes in the condensate tubing where it contacts the top of the coil.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  5. #70
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,974
    Quote Originally Posted by timtanguay View Post
    A lot of window shakers have condensate splashers built onto the condenser fan motor .
    Exactly the same concept. I think I have seen the term "slinger" used for the condensing side fan blade having a loop of small slingers on the perimeter of the fan blades to pick up the condensate and sling it into the condensing coil.

    This practice did two things; it cooled the condensing coil and it prevented having liquid condensate dripping down the wall of buildings with dozens of through the wall units in it.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  6. #71
    Join Date
    Dec 2011
    Location
    New Zealand
    Posts
    2,270
    Quote Originally Posted by boilerman856 View Post
    How come the minerals or TDs does not plate out when misted into the air flow? Is it just cooling the air before it goes through the condenser? How do you keep the water from hitting the coil?


    Sent from my XT907 using Tapatalk 2
    Remember that is the air is cooled by vapourization of the water droplets, not sensible cooling. The small droplets evaporate totally, leaving a very small piece of mineral powder, which is dry. The water is pushed in the opposite direction the airflow, so in effect is travelling in a U shape, away from the coil (using water velocity pressure), as the speed drops, the water drops fall, where air movement brings the water back towards the coil. By which tiemit has evaporated, large droplets fall to the ground as air velocity is low and can not over come the weight and gravity. (there droplets has still start to evaporate, so TDS concentration is higher than the original flow. (As a side note, this principle is how they make milk powder, evaporating the water from the milk solids in just a heated air stream, but with a bit more science and expense)
    The water does not touch the coil, only lower dry bulb, with high RH% air hits the coil. (if the wind is blowing a few drops may, but not enough to worry about)

  7. #72
    Join Date
    Apr 2012
    Location
    arizona
    Posts
    20
    Had a friend try it here in phoenix....
    Lasted about 2 years...
    Then he replaced his "very" corroded condenser... not a good idea!

  8. #73
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,974
    Did your friend use water from the condensate? What was the source of the corrosion? The difference between a good idea and a bad one can be the difference in product used.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  9. #74
    Join Date
    Apr 2012
    Location
    arizona
    Posts
    20
    Not sure... I believe he used city water.
    I guess I overlooked the part where you said the water never came in contact with the coil... shouldn't have an issue if that's the case.
    The bozo that I know was using a mister system spraying directly onto the coil...
    High calcium high evaporation = scaled condenser coil = under deposit corrosion hence 3500$ replacement

  10. #75
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,974
    Quote Originally Posted by mhamilton247 View Post
    Not sure... I believe he used city water.
    I guess I overlooked the part where you said the water never came in contact with the coil... shouldn't have an issue if that's the case.
    The bozo that I know was using a mister system spraying directly onto the coil...
    High calcium high evaporation = scaled condenser coil = under deposit corrosion hence 3500$ replacement
    I have water from my condensate spray directly on the coil. Have been doing this for others for decades, and have never had a problem. No minerals in condensate. Good reason to keep drain pan clean too.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  11. #76
    Join Date
    Sep 2011
    Posts
    25
    Yeah never do this. You may get a season or two out of it but after that you better expect to be replacing the condensing unit. Between scale, dirt build up and rust it's not worth it. The coil was designed to be air cooled, if this was feasible everyone would already have it. Everyone is pushing to have the most "green" product around.

  12. #77
    Join Date
    Aug 2012
    Location
    Gulf Coast
    Posts
    95
    Quote Originally Posted by Random1634 View Post
    Yeah never do this. You may get a season or two out of it but after that you better expect to be replacing the condensing unit. Between scale, dirt build up and rust it's not worth it. The coil was designed to be air cooled, if this was feasible everyone would already have it. Everyone is pushing to have the most "green" product around.
    Thus the water source heatpump!

    Sent from my SCH-I500 using Tapatalk 2

  13. #78
    Join Date
    Sep 2011
    Posts
    25
    Exactly, but I'm thinking the cooling tower may be a bit excessive for the house

    Sent from my SPH-L900 using Tapatalk 2

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