What is the density of refrigerant 134a?
4.25 kg/m³1,1,1,2-Tetrafluoroethane / Density
What is the specific heat capacity of R134A?
148.4 kJ/kg
For HFC-134a, H (ref) = 148.4 kJ/kg and S (ref) = 0.7967 kJ/kg·K.
What is the thermal conductivity of R134A?
Wakeham, W.A. Zalaf, M. 1990. Thermal conductivity of R134a over the temperature range 240 to 373 K. I.I.F. – I.I.R.
What is thermal conductivity of refrigerant?
Thermal conductivity of liquids Most organic liquids (and therefore all refrigerants) have a thermal conductivity in the range of 0.100–0.200 W m−1 K−1 (IUPAC, 1987).
What is the critical temperature of refrigerant?
The critical point occurs at 31 °C (88 °F), which is below typical system condensing temperatures for part or all of the year, depending on the climate. Above the critical point the refrigerant is a transcritical fluid.
Why specific heat of refrigerant should be low?
1) The refrigerant should have low boiling point and low freezing point. 2) It must have low specific heat and high latent heat. Because high specific heat decreases the refrigerating effect per kg of refrigerant and high latent heat at low temperature increases the refrigerating effect per kg of refrigerant.
What is Q in specific heat capacity?
Q is the amount of supplied or subtracted heat (in joules), m is the mass of the sample, and ΔT is the difference between the initial and final temperatures. Heat capacity is measured in J/(kg·K).
What is the freezing point of r134a refrigerant?
Where water normally boils at 212 degrees Fahrenheit (and freezes at 32 degrees), a refrigerant like R-134a boils at 15 degrees below zero (and freezes at -154).
Which refrigerant has highest critical temperature?
∴ Ammonia has the highest critical point pressure.
What is the specific heat capacity of refrigerant?
Thermodynamics Glossary – Freon 12. Freon 12 is the Dupont trade name for flurocarbon refrigerant gas, CCl2F2. The saturated liquid at 20 C has a specific heat of 0.96 kJ/ kg. K and at -20 C the specific heat is 0.90 kJ/ kg.
What is SG in fluid mechanics?
Specific Gravity. The specific gravity of a fluid, designated as SG, is defined as the ratio of the density of the fluid to the density of water at some specified temperature. Usually the specified temperature is taken as 4 °C and at this temperature the. density of water is 1000 kg/m3.