Hello readers welcome to the new post. Here we will discuss the R-290 Propane Refrigerant PT Chart. For repairing and diagnosing Air conditioners and refrigerators it is suggested to check the current pressure and temperature of the system where it operating. Here we we will discuss the details of R-290 Propane Refrigerant and make its PT chart that helps to diagnose the system. So let’s get started with R-290 Propane Refrigerant PT Chart.
Introudcton to R-290 Refrigerant
- R290 is refrigerant-grade propane that is employed for different AC units and refrigeration. High pure propane comes with low environmental effects and nominal global warming potential which means it does not have harmful effects on the ozone layer.
- It is also a hydrocarbon alternative option of EPA and is used in place of different harmful refrigerants such as R22, R134a, R404a, and R502.
- Some years ago very less people knew the use of propane as a refrigerant. Propane was used in the grill and power the forklift.
- The use of R290 as refrigerant is about more than a hundred years but less used due to flammability risk.
- With time there is advancement in technology and the use of environmentally friendly refrigerants increases.
- The HFC refrigerant is best for handling Global warming effects. Propane is best to use as an alternative.
- The first commercial use propane refrigeration instruments were made in the 1930s.
Properties of R-290
The main features of R290 are listed here
- Its formula is C3H8 and its weight is 44.1 g/mol
- Boiling temperatures is -43.8 (-42.1)
- Critical temperature is 206.1 (96.7)
- Critical pressure is 616.5 (42.5)
- it has a global warming potential of about three
- Ozone depletion potential is zero and ASHRAE Safety Group is A3
R-290 Advantages
R-290 Advantages
- Propane offers lower GWP as compared to R-404A, R-22, and R-134A which is the main cause of R-290’s use is increased in some years for replacement of older and harmful materials
- The performance of R290 is comparable with R-22, R-404A, and R-134a.R-290’s pressure losses are theoretically higher is 49 percent less than the same oil running R22 and 36 percent lower for a coil of R134a reduces the watt use
R-290 PT Chart
THE R290 PT chart is listed here
| R290 Temperature (°C) | |||||
| R290 Temperature (°C) | Pressure (psig) |
R290 Temperature (°C) | Pressure (psig) |
R290 Temperature (°C) | Pressure (psig) |
| -70 | -11.15 | -30 | 9.65 | 10 | 77.62 |
| -68 | -10.71 | -28 | 11.62 | 12 | 82.95 |
| -66 | -10.23 | -26 | 13.72 | 14 | 88.52 |
| -64 | -9.70 | -24 | 15.93 | 16 | 94.31 |
| -62 | -9.13 | -22 | 18.28 | 18 | 100.33 |
| -60 | -8.50 | -20 | 20.77 | 20 | 106.60 |
| -58 | -7.81 | -18 | 23.39 | 22 | 113.11 |
| -56 | -7.07 | -16 | 26.16 | 24 | 119.88 |
| -54 | -6.27 | -14 | 29.07 | 26 | 126.91 |
| -52 | -5.40 | -12 | 32.15 | 28 | 134.20 |
| -50 | -4.46 | -10 | 35.38 | 30 | 141.77 |
| -48 | -3.44 | -8 | 38.77 | 32 | 149.61 |
| -46 | -2.35 | -6 | 42.34 | 34 | 157.73 |
| -44 | -1.18 | -4 | 46.08 | 36 | 166.16 |
| -42 | 0.08 | -2 | 50.00 | 38 | 174.86 |
| -40 | 1.42 | 0 | 54.11 | 40 | 183.87 |
| -38 | 2.86 | 2 | 58.41 | 42 | 193.20 |
| -36 | 4.40 | 4 | 62.90 | 44 | 202.84 |
| -34 | 6.04 | 6 | 67.60 | ||
| -32 | 7.79 | 8 | 72.50 | ||
What is the pressure on a R290 refrigerator?
| Formula | C3H8 |
|---|---|
| Boiling temperature °F (°C) | -43.8 (-42.1) |
| Critical temperature °F (°C) | 206.1 (96.7) |
| Critical pressure, PSI, (Bar) | 616.5 (42.5) |
R290 Refrigeration Gas Properties:
| Features | Details |
| Boiling point | -42.1°C |
| Critical temperature | 96.74 °C |
| Boiling point Triple point temperature | -187.62 °C |
| Refrigerant Charge Reduction | ~40% |
| Ignition Temperature |
878°F (470°C)
|
| Smell | no |
| Glide temperature | 0 °C |
| Water content: |
≤ 12 ppm weight
|
| Critical Density |
220.4781kg/m3
|
| Global Warming Potential | 3 |
| Lower Flammability Limit |
2.1% by volume
|
| Upper Flammability Limit |
9.5% by volume
|
| Latent heat at 25°C | 342 (kj/kg) |
What is the pressure of R290 refrigerant in a deep freezer?
With lower pressure send in the cylinder first and then another refrigerant for the mixture. The pressure of R290 and R600a is 4.047 bar and 7.7 bar respectively.
What is the critical point of R290?
R290 comes with a high-temperature range and has a critical point over 96 degrees can easily used with seawater condensers. The triple point exists at -188 degrees making it best for chilled water and provision cooling uses. The pressure range is comparable with ammonia.
What is the correct pressure for a refrigerator?
The low side of the refrigerator will operate at about 15 PSIG. if there is a freezer it will work about one five psig. The high side can be different from low 100 to more than 175 based on ambient temperature and condenser design.
What is high purity R290?
R290 is a high-purity propane used in refrigeration that is famous due to less ozone depletion and global warming potential and better thermodynamic features than traditional refrigerant products.
What are the hazards of R290?
R290 is high flammable gas though it has a low flammability range which means it needs a certain concentration in air for ignition, leakage of R290 from the system can pose fire hazards, especially for confined spaces.
Is R290 highly flammable?
R290 is a hydrocarbon that is considered as high flammable.
What oil is used with R290?
Refrigerant R290 is used with polyester oil in compressors, which means material compatibility is the same as R134a for oil. R600a and R290 are chemically inactive for refrigeration circuits and that does not cause any serious issue
What is a PH diagram?
The PH diagram is a graph having a vertical axis of absolute pressure and a horizontal axis of certain enthalpy. it is a good diagram used for the operation measuring of refrigerating machines. The PH graph is created for certain refrigerants.
Is R290 high pressure?
The suction pressure of R290 is about 50 psig to 70 PSig. that is about R22. But the discharge pressure of R290 is less than R22.
What type of refrigerant is 290?
R290 is refrigerant-grade propane used as an alternative for R22 and R502 in low medium and high temperature refrigeration and AC units.
What is the difference between R22 and R290?
R290 is ozone-depleting refrigerant and R22 is non-zero ODP refrigerant. The GWP value of R290 is 20 and low value than R22. there is a high difference between the normal boiling point and critical temperature of refrigerants R22 and R29
R290 Refrigerant Gas Application
R290 is highly flammable and best for use in medium-temperature commercial refrigeration units, AC units, heat pumps, and display cases.
It is best for the larger part of industries uses, commercial refrigeration, chill cabinets, etc
R290 Features and Benefits
- Refrigerant can charged through liquid or vapor phase.
- The Gas refrigerant cylinders come with dual port valves and help to offtake liquid easily
- Compressors are charged with different oils.
- It has a lower GWP of about 3.
- It has good thermodynamic features for providing high energy efficiency
- It uses different charging and recovery processes since it has inflammable
R290 vs. R600a
| Features | R290 | R600a |
| Refrigerant Charge Reduction | ~40% | ~45% |
| Global Warming Potential | 3 | 3 |
| Common Fluorocarbon Replacement | R22 | R12 |
| Ignition Temperature | 878°F (470°C) |
860°F (460°C)
|
| Lower Flammability Limit | 2.1% by volume |
1.5% by Volume
|
| Upper Flammability Limit | 9.5% by volume |
8.5% by volume
|
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