extraction turbine

extraction turbine

[ik′strak·shən ′tər‚bīn]
(mechanical engineering)
A steam turbine equipped with openings through which partly expanded steam is bled at one or more stages.
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However in the cold end of power extraction turbine the steam starts to condense into water and droplets form this is especially a problem at part load.
[Q.sub.PQE] (*)--input-output diagram of the extraction turbine;
[P.sub.PQE] (*)--cogeneration part of the power output of the extraction turbine;
[Q.sub.QE]--heat load (output) of the extraction turbine;
[P.sub.PQ]--total power generation output of the CPP with the extraction turbine.
Cogeneration Power Plant: Boilers & Extraction Turbines & Generators (PQ Unit)
The input-output characteristics of cogeneration power plants (CPP) with the extraction turbines can be presented as follows:
4) constraints of CPP with extraction turbines (k = 1, ..., n3)
Here [P.sub.D] is the electric power demand; [Q.sub.D] is the heat demand; i, j, k, l are the indices and n1, n2, n3, n4 are the numbers of the condensing power plants, boiler plants, CPP with extraction turbines and CPP with back-pressure turbines, respectively.
3) for cogeneration units with extraction turbines (k = 1, ..., n3)
A TG6,0/6,3P2,2/0,7 type steam turbogenerator set is a typical condensation-type, controlled process steam extraction turbine plant.

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