Results 1 to 14 of 14

Thread: R290 Systems

  1. #1
    Join Date
    Mar 2006
    Location
    Frederikssund
    Age
    48
    Posts
    24
    Rep Power
    0

    Thumbs up R290 Systems



    I like to see all types of R290 systrems that you have experince with

    Chillers, Oil return, exp valv, exp systems,level controls, drive conditions.

    Our Product program
    Chiller
    evap: Plate
    cond: Plate/Aircondenser
    exp:danfoss exp valve
    55 Kw-330kw @ 0C/35C
    No oil return



  2. #2
    Join Date
    Aug 2005
    Location
    USA
    Posts
    5,326
    Rep Power
    25

    Re: R290 Systems

    Flooded shell & tube evaporator + flash tank + two engine driven twin screw compressors + air cooled oil coolers for natural gas processing facility

    recip. compressors + air-cooled condenser + thermosiphon oil & head cooling for off-shore platform used to cool a membrane for CO2 removal from natural gas supply

    Gas compression compressor (twin-screw & propane) all explosion proof for gas processing facility

    Just to name a few...

    All were intrinsically safe.

  3. #3
    Join Date
    Mar 2005
    Location
    USA
    Age
    76
    Posts
    639
    Rep Power
    20

    Re: R290 Systems

    Gas engine drives, steam turbine drives as well as electric motor drives. Air cooled condenser, water cooled condensers and evaporative cooled condensers.

    I had used oil flooded twin screw compressor, recip compressors and centrifugal compressor, ranging from 50 HP up to 6500 HP.

    Most all are Class 1, group C&D, Division 2 area classification and a few are Division 1.

    The smaller units are skid mounted and factory assemblied and the larger ones are partially field erected.

    The uses are in gas processing facilities, refineries and chemical plants. Most are due to having propane in the plant as a normal part of the process. many do not use refrigerant grade and use HD-5 grade of propane as it is more readily available. The HD-5 grade is about 95% propane and has some light ends and some heavy ends. The light ends effect the partial pressure and cause a higher than normal condensing pressure which draws more HP in the compressor.

    A few projects are also on propane storage caverns, propane barges and propane land based storage facilities. We also have propane refigeration/recovery equipment on off shore production platforms.

    Ken

  4. #4
    SANJEEV KUMAR's Avatar
    SANJEEV KUMAR Guest

    Re: R290 Systems

    procedure to charge hc blend in r12 refrigerator and operating pressure of the same.

  5. #5
    Join Date
    Mar 2005
    Location
    USA
    Age
    76
    Posts
    639
    Rep Power
    20

    Re: R290 Systems

    I don't understand your question?

    Ken

  6. #6
    Join Date
    Jan 2006
    Location
    Croatia
    Age
    68
    Posts
    2,299
    Rep Power
    31

    Re: R290 Systems

    Hi, Sanjeev Kumar

    Quote Originally Posted by SANJEEV KUMAR View Post
    procedure to charge hc blend in r12 refrigerator and operating pressure of the same.
    Are you asking about retrofit R12 system with another refrigerant (R134a)
    http://www.shoptrac.com/r12retro.htm
    http://www.google.com/url?sa=t&ct=re...5cA3t05YeQI8Ww


    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.

  7. #7
    Join Date
    May 2007
    Location
    Australia
    Age
    39
    Posts
    73
    Rep Power
    17

    Re: R290 Systems

    Hydrocarbon Link of interest
    click into Hr12 for a tempreture pressure chart
    for the r12 replacement
    http://www.hychill.com.au/tech/



  8. #8
    Join Date
    Jan 2009
    Location
    INDIA
    Posts
    40
    Rep Power
    0

    Re: R290 Systems

    have u dealt with Propylene ,proapane and ethylene mixture ? Normally pure propane is difficult to get in refineries.

  9. #9
    Join Date
    Jan 2009
    Location
    INDIA
    Posts
    40
    Rep Power
    0

    Re: R290 Systems

    How did you solve the problem of set points of instruments,in plant ,running on propylene blended mixtures as well on 95 % propane? actually customer wants to run the plant on both types of hydrocarbons.

  10. #10
    Join Date
    Dec 2008
    Location
    USA
    Age
    41
    Posts
    58
    Rep Power
    16

    Re: R290 Systems

    I have none but would like to learn because it seems that the industry may be heading in the HC arena in the next few years. I'm in the US and it hasn't become popular yet but i'm sure will soon enough. Some of you out there are from places where HC is commonly used, I wonder how to do you recover these types of refrigerants?

  11. #11
    Join Date
    Sep 2008
    Location
    Philippines Islands
    Age
    59
    Posts
    29
    Rep Power
    0

    Re: R290 Systems

    Hello, I red your posts, definitively interesting.

    I was asking myself a basic question:
    because of flammable and explosive nature of R290, which is the
    - maximum pressure
    - maximum temperature
    a component should respect to respect a safety limit and avoiding issues of flaming and explosion ?

    Many thanks

  12. #12
    Join Date
    Jan 2006
    Location
    Croatia
    Age
    68
    Posts
    2,299
    Rep Power
    31

    Re: R290 Systems

    Hi, PaulL

    Quote Originally Posted by PaulL View Post
    Hello, I red your posts, definitively interesting.

    I was asking myself a basic question:
    because of flammable and explosive nature of R290, which is the
    - maximum pressure
    - maximum temperature
    a component should respect to respect a safety limit and avoiding issues of flaming and explosion ?

    Many thanks
    R290 - propane is used as refrigerant (must be very pure) thus in closed circuit .... suction and condensing pressure/temperature are between

    Tmin= -56*C and critical T= 96*C

    Equipment used (electrical motors, switches etc.) must be EEX-explosion proof... thus no problem with fire and explosion....

    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.

  13. #13
    Join Date
    Sep 2008
    Location
    Philippines Islands
    Age
    59
    Posts
    29
    Rep Power
    0

    Re: R290 Systems

    Many thanks Mr. Josip.

    As a matter of fact, I was not clear enough.

    Please let me put the question in a different way.
    Ex: is R290 safe at 30 bar and corresponding saturation temperature (77.5 °C) or may be present any hazard of explosion ?

    What worries me is: according to what rule a component supplier (valves, heat exchanger, compressors) declares these values ?

    Many thanks

  14. #14
    Join Date
    Jan 2006
    Location
    Croatia
    Age
    68
    Posts
    2,299
    Rep Power
    31

    Re: R290 Systems

    Hi, PaulL

    Quote Originally Posted by PaulL View Post
    Many thanks Mr. Josip.

    As a matter of fact, I was not clear enough.

    Please let me put the question in a different way.
    Ex: is R290 safe at 30 bar and corresponding saturation temperature (77.5 °C) or may be present any hazard of explosion ?

    What worries me is: according to what rule a component supplier (valves, heat exchanger, compressors) declares these values ?

    Many thanks
    Refrigeration plants (where I was working) were working with lower value both temperature&pressure, but I believe when we are bellow critical T= 96*C and critical P=42 bar we are in safe area

    autoignition temperature is around 450*C

    please check this..

    http://docnav.grasso-global.com/.../...290_gbr_1_.pdf


    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.

Similar Threads

  1. contaminants in ammonia systems
    By Johnny Rod in forum Refrigerants
    Replies: 29
    Last Post: 17-10-2011, 05:26 PM
  2. R290?
    By andyh in forum Refrigerants
    Replies: 15
    Last Post: 22-09-2007, 06:42 PM
  3. My local Apprentice Training Classes
    By shogun7 in forum Training
    Replies: 12
    Last Post: 17-03-2007, 04:10 PM
  4. Refrigeration alarm systems
    By tonydeith in forum Supermarket Refrigeration
    Replies: 19
    Last Post: 27-04-2006, 01:43 AM
  5. HFCs for flooded systems?
    By garyb in forum Refrigerants
    Replies: 15
    Last Post: 21-04-2006, 10:02 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
  •