1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Is sensible heat involved in the equivalent evaporation of boiler?

  1. May 4, 2013 #1

    Elz

    User Avatar

    1.Is sensible heat involved in the equivalent evaporation of boiler?
    While studying about the equivalent evaporation of boiler I got confused about the equation. The equation says,


    2. E=Total heat required to evaporate feed water/2257(latent heat of water)
    The definition of E is the amount of dry saturated steam generated from feed water at 100°C to steam at 100°C at the saturation pressure corresponding to 100°C. But the equation shows that

    E×2257= Total heat required to evaporate feed water

    E×2257=me (h-hw)

    this hw is the enthalpy of the feed water eg: 32°C, and this h is the enthalpy of the final steam generated which in the mathematical examples is normally shown at 10/11 bar. So it means on the right side of the equation sensible heat is involved but on the left side it is only latent heat. How does this happen?

    Also how are we getting E from and at 100°C when on the right side we have feed water temp below 100°C and steam temp above 100°C??



    3. Can anyone please answer?

    Is it something like we are comparing the actual heat required with the latent heat? I'm confused...
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted



Similar Discussions: Is sensible heat involved in the equivalent evaporation of boiler?
  1. Evaporation moisture (Replies: 2)

Loading...