R134a Properties

Overview

Engineering reference data for R134a Properties in miscellaneous.

Key Formulas

Unit Conversion

$y = x \cdot k$

Multiply by conversion factor.

Linear Interpolation

$y = y_1 + \frac{(x - x_1)(y_2 - y_1)}{x_2 - x_1}$

Estimate between two known points.

Percentage

$p = \frac{\text{part}}{\text{whole}} \times 100\%$

Part as fraction of whole.

Variables

Symbol	Description	Unit
$x$	Input value	—
$y$	Output value	—
$k$	Conversion factor	—

Property Tables

Refrigerant R-134a exhibits distinct thermodynamic properties at saturation conditions across a range of temperatures. The following tables summarize key data in both Imperial and SI units.

Note: The data above includes pressure in psia. The original table also contained pressure in psig and a note for temperatures below -14.7 psia (where pressure is referenced in inches of mercury below one atmosphere).

Data Note: The enthalpy liquid value for 0°C in the source data was listed as 1000.0 kJ/kg, which is likely a typographical error. It has been corrected to 100.000 kJ/kg in the table above for consistency with the trend in the data.

Key Identifiers and Properties

R-134a is known by several identifiers in industry:

• Chemical Formula: $\text{CH}_2\text{FCF}_3$
• IUPAC Name: 1,1,1,2-Tetrafluoroethane
• Common Trade Names: Genetron 134a, Suva 134a
• ASHRAE Designation: HFC-134a

It is a hydrofluorocarbon (HFC) refrigerant developed as a replacement for older refrigerants like R-12 due to its zero ozone depletion potential ($\text{ODP} = 0$). It is commonly used in residential and automobile air conditioning systems.

Interactive Charts

References

• Original Source