How do you calculate latent heat from a steam table?

vf = Specific volume of saturated water (liquid). 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)

How do you calculate the heat content of a steam?

Step 1: Determine Properties of Steam Produced The Specific Enthalpy is then multiplied by the Mass Flow to get the Energy Flow: Pressure = 100.5 psig. Temperature = 681.8 °C. [Steam Property Calculator] => Specific Enthalpy = 1,669.8 btu/lbm.

What is kN m2 in KG?

Convert kilonewtons to kilograms 1 kilonewton is equal to 101.9716005 kilograms, which is the conversion factor from kilonewtons to kilograms. Go ahead and convert your own value of kN to kg in the converter below. For other conversions in mass, use the mass conversion tool.

When the pressure increases the latent heat of steam?

With the increase in pressure the boiling point of the liquid increases and a lesser amount of energy needed to overcome the intermolecular force thus the latent heat of steam required is decreased.

What is the difference between sensible heat and latent heat?

Sensible heat and latent heat are the types of energy absorbed or released in the atmosphere. Sensible heat relates to the change in temperature of an object or gas without a change in the phase. But, latent heat relates to the change in phase between solids, liquids, and gases.

What are the properties of superheated steam?

The superheated steam region depicts steam at a temperature higher than its saturation temperature. Should saturated steam be heated at constant pressure, its temperature will rise, producing superheated steam.

What is the normal temperature and pressure of steam?

NTP – Normal Temperature and Pressure – is defined as 20oC (293.15 K, 68oF) and 1 atm (101.325 kN/m2, 101.325 kPa, 14.7 psia, 0 psig, 30 in Hg, 760 torr) Vacuum steam is the general term used for saturated steam at temperatures below 100°C. Example – Boiling Water at 212 oF and 0 psig

How much heat energy is needed to steam 1 kg of water?

According the table 720.94 kJ is required to raise 1 kg of water from 0 oC to saturation temperature 170 oC. The heat energy (enthalpy of evaporation) needed at 7 bar g to vaporize the water to steam is actually less than required at atmospheric pressure.

How does the specific enthalpy of steam decrease with pressure?

The specific enthalpy of vaporization decreases with steam pressure. The evaporation heat is 2046.53 kJ/kg at 7 bar g. Note! The specific volume of steam decreases with increased pressure – and the amount of heat energy distributed by the same volume increase.

What is the saturation temperature of steam at 7 bar?

Steam at atmospheric pressure is of a limited practical use because it cannot be conveyed by its own pressure along a steam pipe to the points of use. In a steam distribution system the pressure is always more than 0 bar gauge. At 7 bar g (absolute 8 bar) the saturation temperature of water is 170.42 oC.