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Anonymous Poster #1

Regenerative Feed Water Heaters

08/15/2012 7:12 AM

How Regenerative feed water heaters in thermal power plant increase system efficiency?? (knowing that temp rise in feed water increases efficiency, but steam is extracted from turbine, why turbine efficiency does not decrease??)
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#1

Re: Regenerative Feed Water Heaters

08/15/2012 7:29 AM

It should be self-evident. In a thought experiment, rather than feed the boiler with water at 15degC, feed it at 95degC instead. What happens to the fuel-to-steam flowrates ratio? Why?

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Anonymous Poster #2
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Re: Regenerative Feed Water Heaters

08/15/2012 3:36 PM

Banu,

Do some reading up on Feedwater heaters and the Rankine thermal cycle.

Use Wikipedia and review the "Feedwater Heater" page.

Study the temperature-entropy diagram for the Rankine cycle. What would this diagram look like without feedwater heating ?
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