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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
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.
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
procedure to charge hc blend in r12 refrigerator and operating pressure of the same.
I don't understand your question?
Ken
Hi, Sanjeev Kumar :)
Are you asking about retrofit R12 system with another refrigerant (R134a)Quote:
Originally Posted by SANJEEV KUMAR
http://www.shoptrac.com/r12retro.htm
http://www.google.com/url?sa=t&ct=re...5cA3t05YeQI8Ww
Best regards, Josip :)
Hydrocarbon Link of interest
click into Hr12 for a tempreture pressure chart
for the r12 replacement
http://www.hychill.com.au/tech/
have u dealt with Propylene ,proapane and ethylene mixture ? Normally pure propane is difficult to get in refineries.
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.
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?
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
Hi, PaulL :)
R290 - propane is used as refrigerant (must be very pure) thus in closed circuit .... suction and condensing pressure/temperature are betweenQuote:
Originally Posted by PaulL
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 :)
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
Hi, PaulL :)
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 areaQuote:
Originally Posted by PaulL
autoignition temperature is around 450*C
please check this..
http://docnav.grasso-global.com/.../...290_gbr_1_.pdf
Best regards, Josip :)