What is the gas constant for refrigerant 134a?
0.08149
©Kurt Gramoll
| Gas Constant, R (kJ/kg-K) | |
|---|---|
| Nitrogen | 0.2968 |
| Oxygen | 0.2598 |
| R-12 | 0.06876 |
| R-134a | 0.08149 |
Is R134A a gas at room temperature?
1,1,1,2-Tetrafluoroethane – R-134a – is an inert gas used primarily as a high-temperature refrigerant for domestic refrigeration and automobile air conditioners.
What is K for R134A?
For HFC-134a, H (ref) = 148.4 kJ/kg and S (ref) = 0.7967 kJ/kg·K.
What is the critical pressure of refrigerant 134a?
The critical temperature of R134a is 252 degree Fahrenheit or 122 degree Celsius.
What is the density of R134A?
4.25 kg/m³1,1,1,2-Tetrafluoroethane / Density
What is the critical temperature for HFC 134a?
Molecular formula:： CHF2CHF2 ，Molecular weight：102.03 boiling point ：-26.26℃ ， Critical temperature ：101.1 ℃ ，Critical pressure ：4067kpa。
Why R134a is not used in AC?
R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. Bottom line, R134a simply doesn’t cool as well as R12. In addition, there was the lubricant issue. Because A/C compressors have moving parts, they require oil.
What is the saturation temperature of R134a?
R134a – TetraFlouroEthane Saturation Properties – Temperature Table (-40°C – 20°C)
| Temp | Pressure | enthalpy (kJ/kg) |
|---|---|---|
| -40 | 51.2 | 225.86 |
| -36 | 62.9 | 223.35 |
| -32 | 76.7 | 220.81 |
| -28 | 92.7 | 218.23 |
At what temperature does R134A boil?
-15.34°F (-26.3°C)1,1,1,2-Tetrafluoroethane / Boiling point
What is the condensing temperature of R134A?
That fact explains why compressor manufacturers limit the condensing temperature for R407C to around 145–150°F (60°C–65°C) whereas for R134a compressors, the top limit for condensing temperature is 158–175°F (70–80°C) for air condi- tioning applications.
What color is R134a?
R-134a cylinders are colored light blue.
Is R134a gas or liquid?
The R134A can be charged in a liquid or gaseous state, but always following the charging instructions (in a liquid state on the high pressure side and in a gaseous state on the low pressure side with the compressor running).
What are the components of R 134a pressure temperature chart?
Primarily there are two components of the R 134a pressure temperature chart: one is temperature and the other is pressure. But there are two different columns of pressure readings. One of them is high side pressure and the other one is low side pressure. The gauge that is there on the refrigeration component also features two meters.
What are the boundaries of the psychrometric chart?
Boundaries of the psychrometric chart are a dry-bulb temperature scale on the horizontal axis, a humidity ratio (moisture content) scale on the vertical axis, and an upper curved boundary which represents saturated air or 100-percent moisture holding capacity.
What is constant specific volume on the psychrometric chart?
On the psychrometric chart, lines of constant specific volume are almost vertical lines with scale values written below the dry-bulb temperature scale and above the upper boundary’s saturation temperature scale. On this chart, values range from 12.5 to 15.0 cubic feet/ pound of dry air.
Where is the dry bulb temperature on a psychrometric chart?
Dry-bulb temperature is located on the horizontal, or x-axis, of the psychrometric chart and lines of constant temperature are represented by vertical chart lines. Since this temperature is so commonly used, assume that temperatures are dry-bulb temperatures unless otherwise designated.