What is the heat of vaporization of steam?
| Absolute Pressure | Boiling Point | Latent heat of Vaporization |
|---|---|---|
| (bar) | (oC) | (kcal/kg) |
| 0.9 | 96.71 | 541.14 |
| 11) | 99.63 | 539.30 |
| 1.1 | 102.32 | 537.59 |
How is steam CP calculated?
The heat absorbed is calculated by multiplying the moles of water by the molar heat of vaporization. 5. Steam is heated from 100oC to 140oC. The heat absorbed is calculated by using the specific heat of steam and the equation ΔH=cp×m×ΔT.
What is CP of water?
Water has a specific heat capacity of 4.186 J/g°C, meaning that it requires 4.186 J of energy (1 calorie) to heat a gram by one degree.
How do I get my CV from CP?
The specific heat of gas at constant volume in terms of degree of freedom ‘f’ is given as: Cv = (f/2) R. So, we can also say that, Cp/Cv = (1 + 2/f), where f is degree of freedom.
What is VF and VG in steam table?
vf = Specific volume of saturated water (liquid). vg = Specific volume of saturated steam (gas).
What is HF HFG and HG?
hf- is the specific enthalpy of the saturated fluid under the listed property values. hg- is the specific enthalpy of the saturated gas/vapor under the same listed property values. hfg- is the difference of the specific enthalpy values of the substances at the listed conditions.
How do you calculate CP value?
To calculate Cp, subtract the lower specification limit from the upper specification limit, then divide by six standard deviations.
What is the ratio of CP CV?
The Cp/Cv ratio is also called the heat capacity ratio. In thermodynamics, the heat capacity ratio is known as the adiabatic index. (i.e.) Heat Capacity ratio = Cp/Cv = Heat capacity at constant pressure/ Heat capacity at constant volume.
What is CP and CV of water?
In thermodynamics, there are two kinds of specific heats: Cv (specific heat at constant volume) and Cp (specific heat at constant pressure). Cv is the energy required to raise the temperature of a unit mass of a substance by one degree as the volume is held constant.
How do you find CP for water?
The specific heat capacity of water is 4.18 J/g/°C. We wish to determine the value of Q – the quantity of heat. To do so, we would use the equation Q = m•C•ΔT. The m and the C are known; the ΔT can be determined from the initial and final temperature.
What is CP CV called?
heat capacity ratio
The Cp/Cv ratio is also called the heat capacity ratio. In thermodynamics, the heat capacity ratio is known as the adiabatic index. (i.e.) Heat Capacity ratio = Cp/Cv = Heat capacity at constant pressure/ Heat capacity at constant volume.
How is the critical pressure of steam determined?
Critical pressure varies slightly according to the fluid properties, specifically in relation to the ratio of the specific heats cp/cv of the steam (or other gaseous fluid), which is termed the adiabatic index or isentropic exponent of the fluid, often depicted by the symbols ‘n’, ‘k’ or ‘Y symbol – body text.jpg’.
What is the specific heat capacity of steam?
Steam 0.4615 kJ/kg.K At high temperatures and one atmospheric pressure most process gaseses can be considered close to ideal. In the units kJ/kg.K the gas specific heat capacity @ 300K is given below. If the gas is trully ideal then the Specific Heat Capacity is temperature independent.
Where does critical pressure drop on steam nozzle?
Thus, once the critical pressure drop is reached at the throat of the nozzle, or at the ‘vena contracta’ when an orifice is used, further lowering of the downstream pressure cannot increase the mass flow through the device.
How are steam control valves used in heat transfer?
Before discussing the sizing of control valves for steam systems, it is useful to review the characteristics of steam in a heat transfer application. Steam is supplied at a specific pressure to the upstream side of the control valve through which it passes to a heat exchanger, also operating at a specific pressure.