Results 1 to 2 of 2
  1. #1
    Krpac's Avatar
    Krpac Guest

    liquid overfeed system ***** R404a



    Hi
    I am interested in the experience of liquid overfeed system with ***** R404a . I have one tunnel - Q=440 kW @ -35 C / +35 C . What is optimum circulation rate?



  2. #2
    Join Date
    Aug 2008
    Location
    California
    Posts
    28
    Rep Power
    0

    Re: liquid overfeed system ***** R404a

    http://www.refrigeration-engineer.co...389#post179389

    "Remember R-507(404A) is expensive, going 4-1 means you need to have a larger pipe to reduce the friction losses though the pipe. Also you will have a larger refrigerant charge. Your evaporator efficiency will go up with 4-1 but so will your costs. consider economizing on the liquid feed to say 2-1 or 3-1. This may save you money in the long run."

    Remember just increasing the recirculation rate just mean your evaporator can be smaller. By reducing the recirculation rate your evaporator needs more surface area to maintain the same amount of cooling. Going higher than 4:1 will see very little improvment in the evaporator. (once all the tubes are "wet"-ed no additional benefit will occur with more liquid).

Similar Threads

  1. Refrigeration 101
    By Gary in forum Fundamentals
    Replies: 201
    Last Post: 01-11-2011, 11:18 PM
  2. liquid not reaching TXVs in old rack system
    By tropicold in forum Supermarket Refrigeration
    Replies: 20
    Last Post: 02-01-2010, 01:00 AM
  3. Over charged system... what symptoms?
    By Clk320_Greg in forum Trouble Shooting
    Replies: 2
    Last Post: 19-10-2009, 06:25 PM
  4. Capillary Tube Characteristics
    By Chef in forum Fundamentals
    Replies: 9
    Last Post: 10-03-2009, 02:03 PM
  5. Refrigeration system proposal; comments please.
    By DaBit in forum Technical Speculations
    Replies: 13
    Last Post: 01-01-2003, 04:42 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
  •