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pradeepdhoni
Associate

Join Date: Jul 2011
Posts: 30

Main Steam Flow Compensation Calculation

01/12/2013 1:14 AM

Dear friends, regarding the flow compensation i have seen in many threads. In our power plant for calculating main steam flow we are using the following equation,

{19*P(actual)}/{1.48+0.01*T(actual)-0.0452*P(actual)*42.44} . Help me to understand the formula.

And I know the general formula is,

SQRT Actual flow*(density at operating temp and press/density at designed temp and press).

How to co relate the above equation with below equation.

Kindly give me some ideas or suggestions, how to get the formula.?
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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.
Posts: 32175
Good Answers: 839
#1

Re: Main steam flow compensation calculation

01/12/2013 9:40 AM

Please give the source(s) of this infomation so that an assessment can be made.

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Kilowatt0
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Join Date: Aug 2007
Location: Earth - I think.
Posts: 2143
Good Answers: 165
#2

Re: Main Steam Flow Compensation Calculation

01/12/2013 6:15 PM

Also, please tell us what units you are using.

P= inches of water, inches of mercury, psia, psig, bar?

T= Fahrenheit, Celsius, Kelvin, Rankin?

F= GPM, LPM, bathtubs per fortnight....?

I have often seen where someone has taken some unit of measure, multiplied/divided it by some constant or correction factor, and not explained the result. That is very frustrating, to say the least.

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pradeepdhoni
Associate

Join Date: Jul 2011
Posts: 30
#3

Re: Main Steam Flow Compensation Calculation

01/12/2013 11:44 PM

Pressure - MPA,

temperature - Degree celsius,

flow - CUM/Hr,
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ffej
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Join Date: May 2007
Location: Geelong, Australia
Posts: 1084
Good Answers: 54
#4

Re: Main Steam Flow Compensation Calculation

01/13/2013 3:21 PM

So flow = P/(t-P)? That doesn't look dimensionally correct.

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