What are 3 thermodynamic properties of a refrigerant?
For fluid systems, typical properties are pressure, volume, and temperature.
Why is R134a a good refrigerant?
R134a has fairly good dielectric properties as it has high thermal stability, low boiling point, and chemical inertness against the construction materials used; and is non-toxic and non-flammable. . A dielectric substance in its gaseous state can be used to prevent electric discharges.
What gases are in R134a refrigerant?
1,1,1,2-Tetrafluoroethane (also known as norflurane (INN), R-134a, Freon 134a, Forane 134a, Genetron 134a, Green Gas, Florasol 134a, Suva 134a, or HFC-134a) is a hydrofluorocarbon (HFC) and haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with insignificant ozone …
Is 134a a liquid or gas?
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 temperature does R134a boil at?
-15.34°F (-26.3°C)1,1,1,2-Tetrafluoroethane / Boiling point
Why thermodynamic property is needed?
Of especially critical importance in the application of thermodynamics are the amounts of work required to make substances expand or contract and the amounts of heat required to change the temperature of substances.
Which property is called intensive property?
The properties whose value does not depend on the quantity of matter present in the system are known as intensive properties. Temperature and pressure belongs to intensive properties. It is a bulk property that does not depend on the size of the matter or that of the system. It is a physical property of that system.
What are most important desired properties of refrigerant?
The desirable properties of a refrigerant are as follows:
- Non-toxic.
- Low boiling point.
- Non-flammable and non-explosive.
- Low cost and easily available.
- Easy to liquefy at moderate pressure and temperature.
- Easy of locating leaks by odour or suitable indicator.
- Mixes well with oil.
- Low viscosity so that pressure drop is small.
What are the characteristics of refrigerant 134a?
Properties of R-134a
| No | Properties | R-134a |
|---|---|---|
| 1 | Boiling Point | -14.9°F or -26.1°C |
| 2 | Auto-Ignition Temperature | 1418°F or 770°C |
| 3 | Ozone Depletion Level | 0 |
| 4 | Solubility In Water | 0.11% by weight at 77°F or 25°C |