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Fired Heater Fuel Gas Cascade With Temperature
#1
Posted 07 March 2021 - 10:40 AM
In our process plant we have Fuel Gas FTs which gives us reading in Nm3/hr and we want to calculate from this reading actual fuel gas flow taking into account temperature, pressure and specific gravity corrections.
Which is the most accurate formula for calculating flow rate? What are the best practices followed by other refineries in order to calculate the fuel gas flow, do they apply temperature and pressure correlations? Pressure or density which is better to take in .
Some time the actual fuel gas link with LHV to more accurate.
#2
Posted 07 March 2021 - 11:37 PM
Hi,
Normal m3 , pay attention to the definition of Normal ( P ,T) .
You can calculate the density at (P,T) using perfect gas law or EOS and then you can get access to the mass flow rate ( volumetric flow rate * density).
Good luck
Breizh
#3
Posted 07 March 2021 - 11:43 PM
How do you calculate actual flow rate of Fuel Gas from the flow meter reading?
In our process plant we have Fuel Gas FTs which gives us reading in Nm3/hr and we want to calculate from this reading actual fuel gas flow taking into account temperature, pressure and specific gravity corrections.
Which is the most accurate formula for calculating flow rate? What are the best practices followed by other refineries in order to calculate the fuel gas flow, do they apply temperature and pressure correlations? Pressure or density which is better to take in .
Some time the actual fuel gas link with LHV to more accurate.
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