Dryness fraction measurement - thermodynamics, Mechanical Engineering

Dryness fraction measurement:

Sensible Heat of Water or Heat of Liquid or Enthalpy of Liquid (h)

Sol.: It is quantity of heat which is required to raise unit mass of water from 0°C to saturation temperature (or the boiling point) corresponding to given pressure of steam generation. In the figure given below, 'hf' indicates enthalpy of liquid in kJ/kg. It is different for different pressures.

Laten Heat of Vaporization of Steam (hfg): Or, Latent Heat of Evaporation

It is quantity of heat which is required to transform unit mass of water at saturation temperature to unit mass of steam at same temperature. It is different at different for pressures.

Saturated Steam

It is steam which cannot be compressed at constant temperature without condensing it. In Figure given below condition of steam in the line AB is saturated excepting the point A which indicates water at boiling point temperature. This water which is obtained is called saturated water or saturated liquid.

The steam as it is being generated from water can exist in any of the three different states of it are as follows.
(1)  Wet steam

(2)  Dry (or dry saturated) steam

(3)  Superheated steam.

Among these, the superheated state of steam is very useful as it contains maximum enthalpy for doing useful work. Dry steam is also extensively utilized, but wet steam is of least utility. Different states of steam and stages which are in order of their evolution are shown in the figure given below. Their equivalent volumes are shown therein.

 

Posted Date: 10/15/2012 5:59:54 AM | Location : United States







Related Discussions:- Dryness fraction measurement - thermodynamics, Assignment Help, Ask Question on Dryness fraction measurement - thermodynamics, Get Answer, Expert's Help, Dryness fraction measurement - thermodynamics Discussions

Write discussion on Dryness fraction measurement - thermodynamics
Your posts are moderated
Related Questions
Determine the maximum stress developed in the beam: An I section in Figure is utilized as a beam. The beam is subjected to a bending moment of 2.5 kN m at its neutral axis. De

Illustrate the steady state error for different types of systems. Check the stability of the system using Routh criterion S 6 + 4S 5 + 3S 4 - 16S 2 - 64S - 48 = 0

CO 2 Gas Supply The CO 2 shielding gas is supplied cylinders at high pressure (140 kg / cm 2 ). Therefore pressure regulator and flow meter are connected to reduce the pressu

Program Evaluation and Review Techniques: The Rola and Cola Corporation is a professional II nursing home aspiring to become I nursing home. It desires to provide the ultimate

Q. Explain working of plate heat exchangers? For gasket plate heat exchangers handling flammable materials, the same spacing requirements for air coolers should be applied. If

boiler performance.

Washing: Station 1 Loading bay START Station 2 Hot Chemical wash Station 3 Running Cold bath Station 4 Hot C

Q. Shut-off valves on major zone? Are shut-off valves on major zone branches and on the bottom and top of riser? Are balancing valves on return branches? Are control valves on

Point and Path Function - Thermodynamics: Poin t Function A point function is single valued function which always possesses a single - value is all states. For instance

Q.What is the mean of Off time? It is the interval from the end of the hold time to the beginning of the squeeze time for the next (resistance) welding cycle. In automatic m