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Why attemperator viewed as a losses in reheat steam turbine

Why attemperator viewed as a losses in reheat steam turbine

Why attemperator viewed as a losses in reheat steam turbine

(OP)
Or viewed as reducing efficiency, thank you

RE: Why attemperator viewed as a losses in reheat steam turbine

Several reasons it is considered a loss in cycle efficiency. first, when the unit is modeled in a cycle modeling computer program, it details the loss. Second, the mixing of cold liquid water with much hotter steam implies an increase in irreversability ( 2nd law) , which implies a loss of efficiency. Finally, it is often reasosned that the steam formed by the evaporation of the spray represents steam that bypasses the HP steam turbine.

"...when logic, and proportion, have fallen, sloppy dead..." Grace Slick

RE: Why attemperator viewed as a losses in reheat steam turbine

(OP)
Im not quite sure of your last sentences, does it means because the steam is bypassed from hp turbine, the steam becomes not very useful

RE: Why attemperator viewed as a losses in reheat steam turbine

The re-heat steam flow to the IP/LP turbines, it has already been through the HP.
So you can only recover the energy of the new steam in part of your turbine string.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Why attemperator viewed as a losses in reheat steam turbine

The HP turbine produces power based on the HP steam flowing though it and the pressure ratio across the HP turbine. If the RH attemporator is downstream of the HP turbine, the steam produced by evaporating the spray water does not pass through the HP turbine.

"...when logic, and proportion, have fallen, sloppy dead..." Grace Slick

RE: Why attemperator viewed as a losses in reheat steam turbine

(OP)
okay i got it

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