What is V in steam table?
In addition to pressure and temperature, these tables usually include other related values such as specific enthalpy (h) and specific volume (v). The data found in a saturated steam table always refers to steam at a particular saturation point, also known as the boiling point.
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 does a steam table contain?
Steam tables are defined as the thermodynamic data that contain the properties of water or steam. These data are commonly used by engineers. It is normally used to obtain the following properties using steam pressure for saturated steam temperature and saturated temperature for saturated steam pressure.
What is thermodynamics table?
Thermodynamic tables are generated from complex equations of state, which in turn were developed from accurate experimental data. These tables are quick and easy to use, but they are not available for all materials of engineering interest.
What is VF and VG in steam table?
vf = Specific volume of saturated water (liquid). vg = Specific volume of saturated steam (gas).
What temperature is steam at 150 psi?
366
| Gauge Pressure (psig) | Temperature (oF) | Enthalpy |
|---|---|---|
| Saturated Vapor (Btu/lb) | ||
| 150 | 366 | 1196 |
| 155 | 368 | 1196 |
| 160 | 371 | 1197 |
What is the 1 ton of refrigeration?
A much less common definition is: 1 tonne of refrigeration is the rate of heat removal required to freeze a metric ton (1000 kg) of water at 0°C in 24 hours. Based on the heat of fusion being 333.55 kJ/kg, 1 tonne of refrigeration = 13,898 kJ/h = 3.861 kW.
What is the specific heat of R134a?
148.4 kJ/kg
For HFC-134a, H (ref) = 148.4 kJ/kg and S (ref) = 0.7967 kJ/kg·K.
What temperature is 10 bar steam?
184.13
Steam Tables
| Gauge Pressure (Bar) | Temperature (°C) |
|---|---|
| 9 | 179.97 |
| 9.5 | 182.1 |
| 10 | 184.13 |
| 10.5 | 186.05 |
What is Hg in steam table?
hf – Specific enthalpy of water (sensible heat) hfg – Specific enthalpy of evaporation (latent heat) hg – Specific enthalpy of steam (total heat)
How do you complete a steam table?
How to Use Steam Tables – YouTube
What is HF HFG and HG?
hf is the value of enthalpy of saturated liquid. hg is the value of enthalpy of saturated vapor. hfg = hg-hf = enthalpy change when substance goes from saturated liquid to saturated vapor which is actually latent heat of vaporisation.
What temp is 15 psi steam?
Properties of Saturated Steam
| Guage Pressure (psig) | Absolute Pressure (psiA) | Steam Temp F |
|---|---|---|
| 5.3 | 20.0 | 227.96 |
| 10.3 | 25.0 | 240.07 |
| 15.3 | 30.0 | 250.33 |
| 20.3 | 35.0 | 259.28 |
Why is AC called ton?
The use of tons to measure cooling capacity comes from this time. A ton refers to the amount of heat it takes to completely melt a ton of ice. Melting this amount of ice requires 286,000 Btu (British thermal units).
How do you calculate 1 ton of refrigeration?
One ton of refrigeration is equal to 3024 kilo-calories per hour. This is 12,000 BTU/ h divided by 2.204 (pounds per kilogram) divided by 1.8 (°C to °F).
What should R134a pressures be?
As an air-conditioning refrigerant in newer automobiles, the optimal running pressure for R134A is between 22 and 57 pounds per square inch.
Why R134a is used as 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 is the steam temperature at 7 bar?
170.5
Steam Tables
| Gauge Pressure (Bar) | Temperature (°C) |
|---|---|
| 6.5 | 167.83 |
| 7 | 170.5 |
| 7.5 | 173.02 |
| 8 | 175.43 |
What is HFG HF and HG?
What temperature should a steam table be?
To meet food safety guidelines, hot food in your steam table should always be held at 135 degrees Fahrenheit or higher.
What is HFG steam?
vg = Specific volume of saturated steam (gas). hf = Specific enthalpy of saturated water (energy required to heat water from 0°C (32°F) to the boiling point) hfg = Latent heat of evaporation (energy required to transform saturated water into dry saturated steam)
What temp is steam at 10 psi?
| Gauge Pressure (psig) | Temperature (oF) | Enthalpy |
|---|---|---|
| Saturated Vapor (Btu/lb) | ||
| 9 | 237 | 1159 |
| 10 | 239 | 1160 |
| 12 | 244 | 1161 |
What gas is used in AC?
Freon is a non-combustible gas that is used as a refrigerant in air conditioning applications. This freon undergoes an evaporation process over and over again to help produce cool air that can be circulated throughout your AC system.
How many kW is a ton?
3.5169 kW
1 Ton = 3.5169 kW
That means that 1 ton of refrigeration is equal to 3.52 kilowatts.
How do you calculate refrigerant capacity?
Divide the quantity of refrigerant that the heat pump moves by the time it takes to move it. If it pumps 3.6 kilograms of refrigerant in 10 seconds: 3.6 / 10 = 0.36 kilograms per second.