Results 1 to 4 of 4
  1. #1
    Join Date
    Mar 2016
    Location
    IRAN
    Posts
    107
    Rep Power
    2

    MRI cooling system



    Dear Friends,

    Do you have any experiences about working on cooling system for MRI machines in hospitals or do you have any source or any documents to help me understand how this system works ?

    Thanks for your help in advance.

    Sincerely yours.
    Last edited by A.Mortezania; 19-02-2017 at 07:48 PM.



  2. #2
    Join Date
    Dec 2004
    Location
    LEBANON
    Age
    37
    Posts
    861
    Rep Power
    14

    Re: MRI cooling system

    Dear,
    MRI systems can be cooled by chilled water or city water depending on the manufacturer recommendation.
    You need to have primary and secondary circuits if using chilled water.
    Primary circuit will run the cold water between the chiller heat exchanger (refrigerant/liquid), the cooled liquid will be pumped to another heat exchanger (liquid/liquid) to cool the MRI cooling fluid.
    Mainly (in most models) you need three 3 fluid outputs to the unit each with different flow , flow meters should be used to control the fluid flow in each part.

    hope it is clear enough

    regards
    Engineering, sciences, math, physics and my brain will generate "not responding " soon

  3. #3
    Join Date
    Mar 2016
    Location
    IRAN
    Posts
    107
    Rep Power
    2

    Re: MRI cooling system

    Quote Originally Posted by botrous View Post
    Dear,
    MRI systems can be cooled by chilled water or city water depending on the manufacturer recommendation.
    You need to have primary and secondary circuits if using chilled water.
    Primary circuit will run the cold water between the chiller heat exchanger (refrigerant/liquid), the cooled liquid will be pumped to another heat exchanger (liquid/liquid) to cool the MRI cooling fluid.
    Mainly (in most models) you need three 3 fluid outputs to the unit each with different flow , flow meters should be used to control the fluid flow in each part.

    hope it is clear enough

    regards
    Dear Botrous ,

    Thanks for your information.

    I have important question, I see that MRI cooling machine system as you told we have chilled water, OK.
    But I see that they charge second circuit with helium refrigerant and helium decrease temperature of magnet of MRI machine near to 3 ~ 7 kelvin and it is very low temperature.

    Do you know how helium do this ? and I want to know second circuit also has condenser and evaporator and compressor such as typical refrigeration system ? or it do as other cycle to cool magnet ?

    You can see this video at below address :

    Interesting chiller unit (extremely cool)
    https://www.youtube.com/watch?v=BZL8kJ1lMDs

    Sincerely yours.

  4. #4
    Join Date
    Dec 2004
    Location
    LEBANON
    Age
    37
    Posts
    861
    Rep Power
    14

    Re: MRI cooling system

    Hi in helium system the main chiller is used to cool the helium condenser , but I doubt that for an MRI you need such low tempreture, all the MRI I worked on work actually on normal cold water
    Engineering, sciences, math, physics and my brain will generate "not responding " soon

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •