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
Find out the components of the force: The frame of a certain machine accelerates to the right at 0.8 g m/sec 2 . As illustrated in Figure, it carries a uniform bent bar ABC we


(a) Oil, with density ρ= 900 kg/m 3 , and kinematic viscosity υ=0.00001m 2 /s, flows at the rate of 0.2m 3 /s through 500m of a cast iron pipe of diameter d=200mm. Using this infor

Find out load lifted by the machine: An effort of 400 N is applied in a lifting machine. The distance moved through effort is 4 m and that by load is 40 cm. If the efficiency

application of optiz

Tributary lateral load:   The question is on a fictitious 1965 building in Albany, NY. It was designed using the 1964 State Building Construction Code, in which Allowable Stress

general characteristic of bulk deformation and different process and corresponding product properties

Abrasive Machining Processes Such machining processes are precision machining processes. They generate work-piece surfaces along with a high degree of surface smoothness and d

Explain the Hydraulically extendible Most paver manufacturers have developed hydraulically extendable paver screeds hat trail the primary or basic screed on the paver. One make

Organisation set-up: The civil engineering department of the Railways is responsible for the maintenance of railway lines. The maintenance organisation consists of Chief Engi