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Air Cooler - any recommendation ??

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  1. #11

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    remember, try to not fill the water tank too much, leave some space for the ice pack as the density of the packs will increase when defrosted and you could get a electric shock if the water tank overflows from the tank in to the machine, this is a warning!


  2. #12

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    Quote Originally Posted by imparanoic:
    remember, try to not fill the water tank too much, leave some space for the ice pack as the density of the packs will increase when defrosted and you could get a electric shock if the water tank overflows from the tank in to the machine, this is a warning!
    Have to disagree that an Ice pack´s density should increase when defrozen - should be the other way around.
    But I will take your advise to be careful as water+electricity is a lethal combination
    Thanks for the advise btw....

  3. #13

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    Quote Originally Posted by pepe77:
    I have been considering a portable A/C, but apart from being a lot more expensive they also need connection to the outside through a hose (to get "fresh" air in) - so it is not just a plug&play solution if you can say that
    Yes, you normally need to have an outlet source to expel the exhaust. You can use the vent in your bathroom, or kitchen as an outlet. The diameter of those outlets are usually the size of a duct pipe which is about the same as the outlet pipe for a portable unit.

  4. #14

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    Quote Originally Posted by pepe77:
    Have to disagree that an Ice pack´s density should increase when defrozen - should be the other way around.
    But I will take your advise to be careful as water+electricity is a lethal combination
    Thanks for the advise btw....
    i gather you did not do well in chemstry ino o level/gcse, ice floats on water due to decreases in density, due to weak molecular hydrogen bonding thus expansion of distance between particles (same structure as diamond hence why ice is hard) this is due to the polarised hydrogen atoms with H2O attrached to other H2O particles when the temperture drops

    Properties of water - Wikipedia, the free encyclopedia

  5. #15

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    guys, it's a typo, ice is less dense than water, ok


  6. #16

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    Think of it this way.


    This is water.

    +++++
    +++++
    +++++
    +++++

    This is when water becomes ice

    + + + + +
    + + + + +
    + + + + +
    + + + + +
    + + + + +

    this is floating ice in water

    + + + + +
    + + + + +
    + + + + + ++++++
    + + + + + ++++++
    + + + + + ++++++
    +++++++++++++
    +++++++++++++

    Density is like when people have osteoporosis. The density of their bones decrease, or it becomes more hollow.

    So take a look at the picture above and look at which has less density.


  7. #17

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    Think of it this way.


    This is water.

    +++++
    +++++
    +++++
    +++++

    This is when water becomes ice

    + + + + +
    + + + + +
    + + + + +
    + + + + +
    + + + + +

    this is floating ice in water

    + + + + +
    + + + + +
    + + + + + ++++++
    + + + + + ++++++
    + + + + + ++++++
    +++++++++++++
    +++++++++++++

    Density is like when people have osteoporosis. The density of their bones decrease, or it becomes more hollow.

    So take a look at the picture above and look at which has less density.
    Just remembered water is unique in the phase diagram.

    Other compounds look something like this

    Solid (Ice)

    [][][][][]
    [][][][][]
    [][][][][]
    [][][][][]

    Liquid
    [] [] [] [] []
    [] [] [] [] []
    [] [] [] [] []
    [] [] [] [] []
    [] [] [] [] []

    So pepe is right if he was talking about other compounds.

    Last edited by Creative83; 10-08-2012 at 05:05 PM.
    imparanoic likes this.

  8. #18

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    Ok, I think I used the wrong term - shouldn´t have said density.

    But can we agree that the volume of 1L water increases when frozen ?
    So, will it not decrease when going back to liquid form ?
    And...the container for water (in the A/C unit) is specified by volume (L)

    I am not stobborn....I am more than willing to apologize if you can point out where I am wrong.


  9. #19

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    Quote Originally Posted by Creative83:
    Think of it this way.


    This is water.

    +++++
    +++++
    +++++
    +++++

    This is when water becomes ice

    + + + + +
    + + + + +
    + + + + +
    + + + + +
    + + + + +

    this is floating ice in water

    + + + + +
    + + + + +
    + + + + + ++++++
    + + + + + ++++++
    + + + + + ++++++
    +++++++++++++
    +++++++++++++

    Density is like when people have osteoporosis. The density of their bones decrease, or it becomes more hollow.

    So take a look at the picture above and look at which has less density.
    Just remembered water is unique in the phase diagram.

    Other compounds look something like this

    Solid (Ice)

    [][][][][]
    [][][][][]
    [][][][][]
    [][][][][]

    Liquid
    [] [] [] [] []
    [] [] [] [] []
    [] [] [] [] []
    [] [] [] [] []
    [] [] [] [] []

    So pepe is right if he was talking about other compounds.
    I appriecate your effort, when i have time tonight, i do my version explaining hydrogen bonding of water and it's relationship to density and physical structure

  10. #20

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    Hi Pepe, I did not get any aircooler as most users found it useless. Did think about a standing AC. However, expelling exhaust poses another problem, plus it is not cheap, five thousand something, we decided against buying it.

    Have to endure the heat this summer >.<

    pepe77 likes this.