Results 1 to 5 of 5
  1. #1
    Join Date
    Aug 2008
    Location
    malaysia
    Posts
    76
    Rep Power
    16

    Red face How to select the collect suction pipe line size ?



    Hi engineers , please tell me how to select the correct suction pipe line if the unit cooler outlet is bigger than compressor inlet. thank you !



  2. #2
    Join Date
    Jun 2005
    Location
    California
    Posts
    395
    Rep Power
    19

    Re: How to select the collect suction pipe line size ?

    Turn the compressor around 180degrees and use that line

  3. #3
    Join Date
    Jul 2009
    Location
    Brisbane
    Age
    67
    Posts
    79
    Rep Power
    15

    Re: How to select the collect suction pipe line size ?

    Dont worry about the outlet pipe sizes of either. Use the pipe size that will give you the best balance with pressure drop and velocity for oil return. There are charts and programs available which are less tedious than hand calculations. Sporlan has one on its' selection software. I would ignore Wambats' suggestion he hasn't learn to spell wombat yet. An Australian marsupial not known for being the sharpest tool in the shed.

  4. #4
    Join Date
    Oct 2005
    Location
    IRAN
    Age
    53
    Posts
    894
    Rep Power
    19

    Re: How to select the collect suction pipe line size ?

    Hi,

    Refrigeration piping is not like water piping. You have to be very careful.
    Two things to consider simultaneously, pressure drop and oil return (specially for vertical risers).
    DO NOT USE THE SAME PIPE SIZE AS THE COMPRESSOR VALVES. MOST OF THE TIMES IT IS WRONG.
    I suggest that you first learn how to size the pipes with tables then use a software.
    Even Einstein Asked Questions

  5. #5
    Join Date
    Aug 2009
    Location
    Manchester
    Posts
    29
    Rep Power
    0

    Re: How to select the collect suction pipe line size ?

    Try using a suction accumilator (works in a similar way to an oil separator) gas goes into a "pot" and exits through the top of the "pot" into your suction side of the compressor this works well for preventing liquid returning to your compressor
    however as has been previously stated by the other guys, a proper pipe sizing program is best

Similar Threads

  1. Superheat and Subcooling
    By Chunk in forum Fundamentals
    Replies: 42
    Last Post: 15-01-2011, 02:24 AM
  2. Replies: 5
    Last Post: 14-09-2009, 07:33 AM
  3. Suction line size too small
    By marc5180 in forum Air Conditioning
    Replies: 16
    Last Post: 11-08-2008, 05:41 PM
  4. Benji
    By benji in forum Trouble Shooting
    Replies: 29
    Last Post: 30-01-2008, 02:25 PM

Posting Permissions

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