Sketch the layout for the above processes showing the flow between the turbine, the two- stage regenerator, the drain cooler and the condenser. Sketch the processes on an h-s diagram. Determine m and m2, respectively the mass of steam bled off at 5 bar and at 1 bar per kg of steam supplied to turbine Calculate thermal efficiency of the overall cycle.

Elements Of Electromagnetics
7th Edition
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Author:Sadiku, Matthew N. O.
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Steam from a turbine with inlet pressure 30 bar and temperature 350°C is bled at 5 bar and 1 bar
to supply a two-stage regenerator to heat up condensate leaving the turbine at 0.08 bar. In each
stage, the condensate is heated up to the saturation temperature of the bled steam and the bled
steam itself condenses completely. Remember: in a regenerator, there is no contact between the
two streams, only heat exchange.
of
Consider the amount of steam bled at 5 bar and 1 bar, respectively, to be m¡ and m2 kg per
steam supplied to the turbine.
For the first stage, m¡ kg of bled steam at 5 bar heats each kg of condensate arriving from the
second stage without any contact (that is, regeneration). Then, m¡ kg of condensate derived from
the bled steam drains into the steam space of the second stage at 1 bar without heat loss. The
combined drain from the second stage at 1 bar consists of mi+m2 kg per kg of steam supplied to
the turbine. The combined drain is cooled to the condenser temperature before being directed to
the condenser. Assume the expansion of steam in the turbine to be isentropic.
Transcribed Image Text:Steam from a turbine with inlet pressure 30 bar and temperature 350°C is bled at 5 bar and 1 bar to supply a two-stage regenerator to heat up condensate leaving the turbine at 0.08 bar. In each stage, the condensate is heated up to the saturation temperature of the bled steam and the bled steam itself condenses completely. Remember: in a regenerator, there is no contact between the two streams, only heat exchange. of Consider the amount of steam bled at 5 bar and 1 bar, respectively, to be m¡ and m2 kg per steam supplied to the turbine. For the first stage, m¡ kg of bled steam at 5 bar heats each kg of condensate arriving from the second stage without any contact (that is, regeneration). Then, m¡ kg of condensate derived from the bled steam drains into the steam space of the second stage at 1 bar without heat loss. The combined drain from the second stage at 1 bar consists of mi+m2 kg per kg of steam supplied to the turbine. The combined drain is cooled to the condenser temperature before being directed to the condenser. Assume the expansion of steam in the turbine to be isentropic.
Sketch the layout for the above processes showing the flow between the turbine, the two-
stage regenerator, the drain cooler and the condenser. Sketch the processes on an h-s
diagram.
Determine m¡ and m2, respectively the mass of steam bled off at 5 bar and at 1 bar per
kg of steam supplied to turbine
Calculate thermal efficiency of the overall cycle.
Transcribed Image Text:Sketch the layout for the above processes showing the flow between the turbine, the two- stage regenerator, the drain cooler and the condenser. Sketch the processes on an h-s diagram. Determine m¡ and m2, respectively the mass of steam bled off at 5 bar and at 1 bar per kg of steam supplied to turbine Calculate thermal efficiency of the overall cycle.
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