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takle
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Join Date: Jun 2008
Posts: 25

what does natural gas based turbine exhuast content and its calorific value

07/08/2008 2:35 PM

we have natural gas based power plant of 3MW and I wanted to know to how to calculate calorific value of the exhaust which is used for the steam generation.
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vicini
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Join Date: Dec 2007
Posts: 588
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#1

Re: what does natural gas based turbine exhuast content and its calorific value

07/08/2008 11:54 PM

Q = Cp * delta T * mass rate

to get the mass flow of the exhaust, contact the vendor on that. The mass rate will be a function of load, fuel.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#2

Re: what does natural gas based turbine exhuast content and its calorific value

07/09/2008 3:24 AM

<...calorific value of the exhaust...>

Eh?

Does that mean that some of the incoming fuel is going out unburnt?

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ducon
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Join Date: Dec 2006
Location: Hop around Toronto, New York & Karachi
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#3

Re: what does natural gas based turbine exhuast content and its calorific value

07/10/2008 10:15 PM

Vicini just replied as:

Q = Cp * delta T * mass rate

to get the mass flow of the exhaust, contact the vendor on that. The mass rate will be a function of load, fuel.

calorific value? you mean temperature? As the Supplier who will provide both the volume of exhaust & temperature.

On Gas Generators depending which (Cat./Janbacher etc.) it varies between 800 kg/hr to 1200 kg/hr steam/MW at 12 bar . On 3 generators you can take 3 single or 1 duplex + 1 single WHR Boilers. On Turbine the steam generation can vary between 3000-4000 kg/hr/MW.

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