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  1. #1
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    DX or Chilled water for residential refrigeration



    Hi,
    Previously I was considering DX system for central airconditioning for my residential project (4-5 units x 18000 BTU) on single compressor with VFD.

    Upon little survey I saw that chilled water system could also work and maybe more effecient. I belive it would be less mantainance with chilled water as I only have to chill water in a tank and passing water through FCU.

    Further technically, I can skip VFD on compressor as if water once chilled could stay chilled for couple of hours or an hour atleast if number of FCU reduced from 4 to 1 (on demand).

    Kindly guide me if this project would be more adivcable compared with DX or otherwise?



  2. #2
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    Re: DX or Chilled water for residential refrigeration

    I guess my question is very basic, but I would appriciate if someone can coment on it.

  3. #3
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    Re: DX or Chilled water for residential refrigeration

    .

    In the UK water chillers are more commercial and industrial and I'm not aware of any domestic versions.

    We are working a lot with Heat pump technology and that tends to be water circulated but not used for chilling
    although it is possible to have it as heating and cooling.

    I have no answer so I wait for people with more experience in this but I would tend to think in small domestic applications that the DX version would be the one to pick just because of the install costs for a water chiller system with pumped water and heat exchangers.

    Rob

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  4. #4
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    Re: DX or Chilled water for residential refrigeration

    most chillers do not come with a tank so you will need space for a chiller and insulated tank dx might be better option on a small installation

  5. #5
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    Re: DX or Chilled water for residential refrigeration

    One potential problem is getting suitable sizes for the indoor units as the chw cooling coils tend to be larger than DX units.

    Personally I like chw but installation can be tricky.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  6. #6
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    Re: DX or Chilled water for residential refrigeration

    thanks for information

  7. #7
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    Re: DX or Chilled water for residential refrigeration

    Hi, skhan855

    Quote Originally Posted by skhan855 View Post
    I guess my question is very basic, but I would appriciate if someone can coment on it.
    both systems are good, but I believe that numbers for
    small home use are against chw ...

    try to put all costs for DX and chw system together
    and you will see by yourself ... which one is cheaper to install and
    later on more reliable with less maintenance ...



    Best regards, Josip

    It's impossible to make anything foolproof because fools are so ingenious...

    Don't ever underestimate the power of stupid people when they are in large groups.

    Please, don't teach me how to be stupid....
    No job is as important as to jeopardize the safety of you or those that you work with.

  8. #8
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    Re: DX or Chilled water for residential refrigeration

    Quote Originally Posted by Josip View Post
    Hi, skhan855



    both systems are good, but I believe that numbers for
    small home use are against chw ...

    try to .... link removed.... put all costs for DX and chw system together
    and you will see by yourself ... which one is cheaper to install and
    later on more reliable with less maintenance ...



    Best regards, Josip
    most chillers do not come with a tank so you will need space for a chiller and insulated tank dx might be better option on a small installation
    Last edited by Josip; 16-09-2021 at 10:25 PM. Reason: remove link

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