What is the enthalpy of r134a?
Thermodynamic Properties of Saturated Refrigerant R134a
| Pressure | Temperature | Enthalpy (kJ/kg) |
|---|---|---|
| 1200 | 46.3 | 117.8 |
| 1400 | 52.4 | 127.3 |
| 1600 | 57.9 | 136.0 |
| 1800 | 62.9 | 144.1 |
What is a pressure-enthalpy diagram for a refrigerant?
The pressure-enthalpy diagram (log P/h diagram) is a very useful tool for refrigerant technicians. First, an explanation of how the diagram is built up is given, and then its use is described. Figure 2.1 shows the principle of a log P/h diagram, and indicates the refrigerant’s various thermodynamic states.
What is the density of R134a refrigerant?
Basic property data (Europe)
| 407C | 134A | |
|---|---|---|
| Density of Saturated Liquid @ 77°F(lb./cu. ft.) | 71.12 | 75.31 |
| Critical Temp.(°F) | 187.2 | 214.0 |
| Critical Pressure (psia) | 690.1 | 589.8 |
| Latent Heat of Vaporization @ b.p. (BTU/lb.) | 107.4 | 92.8 |
What is the critical pressure of refrigerant 134a?
R-134a Properties – Imperial Units
| Temperature (oF) | Pressure (psia) | Pressure (psig) (*inches mercury below one atmosphere) |
|---|---|---|
| 100 | 138.28 | 123.58 |
| 125 | 198.27 | 183.57 |
| 150 | 276.12 | 261.42 |
| 175 | 375.69 | 360.99 |
What is the chemical formula of R 134?
CH2FCF3
1,1,1,2-Tetrafluoroethane/Formula
The refrigerant R134a is the chemical compound tetrafluoroethane comprising of two atoms of carbon, two atoms of hydrogen and four atoms of fluorine. Its chemical formula is CF3CH2F.
How is enthalpy calculated?
Specific enthalpy(h) is defined as h=u+Pν, where u is the specific internal energy (Btu/lbm) of the system being studied, P is the pressure of the system (lbf/ft2), and ν is the specific volume (ft3/lbm) of the system. Enthalpy is usually used in connection with an “open” system problem in thermodynamics.
Where on the enthalpy diagram is refrigerant saturated?
is the big hump in the middle of the PH diagram. it shows the area of saturated refrigerant. they run horizontally from the right side to the left of the diagram.
What is the purpose of a pressure-enthalpy chart?
In chemical engineering, it is often necessary to know how properties like pressure, enthalpy, volume, and entropy relate to each other at a certain temperature. A Pressure-Enthalpy Diagram provides this information but can be cryptic to decipher.
What does HFC-134a stand for?
Refrigerant R134a or HFC-134a is a commercially available hydrofluorocarbon (HFC) refrigerant for use as a long-term replacement for R-12 in new equipment and for retrofitting medium temperature CFC-12 systems.
What does R-134a stand for?
1,1,1,2-tetrafluoroethane, R-134a, Forane 134a, Genetron 134a, Florasol 134a, Suva 134a or HFC-134a, also known as norflurane (INN), is a haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with insignificant ozone depletion potential.
What is refrefrigerant R134a?
Refrigerant R134a or HFC-134a is a commercially available hydrofluorocarbon (HFC) refrigerant for use as a long-term replacement for R-12 in new equipment and for retrofitting medium temperature CFC-12 systems. This refrigerant takes a significant step forward in environmental protection by achieving an ozone depletion factor of zero.
Where to find tetrafluorethane – R134a calculation online?
Online – Calculation – Tetrafluorethane – R134a Berndt Wischnewski Richard-Wagner-Str. 49 10585 Berlin Tel.: 030 – 3429075 FAX : 030 34704037 email: [email protected] Some scientific and engineering data online german Calculation of thermodynamic state variables of tetrafluorethane – R134a