hi there,

so, ive been given a value of air flow in normal litres per minute, which i need to convert to grams/sec. i've never encountered 'normal litres' before so ive been madly googling and ended up here

i know the conditions under which the flow is taking place (high temp & pressure), and i've also been given reference normal conditions for the air density (kg/Nm^3) (where T= 273.15K and P = 1.01325bar)

my question: is the correct way to do this: convert the flow rate and density to the values they will actually have [ie. NL * (1.01325/actual pressure) * (actual temp/273.15) and Ndensity* (1.01325/actual pressure) * (actual temp/273.15)]. then convert the litres to m^3 and multiply by the density to get kg/min which is easy to convert to g/s?

or can i just say: normal litres -> convert to normal m^3 ->times normal density to get 'normal' mass flow ->then multiply by (1.01325/pressure)*(actual temp/273.15)

i get two different answers if i do this, and im not sure which one is right...i would guess the first one?

so, ive been given a value of air flow in normal litres per minute, which i need to convert to grams/sec. i've never encountered 'normal litres' before so ive been madly googling and ended up here

i know the conditions under which the flow is taking place (high temp & pressure), and i've also been given reference normal conditions for the air density (kg/Nm^3) (where T= 273.15K and P = 1.01325bar)

my question: is the correct way to do this: convert the flow rate and density to the values they will actually have [ie. NL * (1.01325/actual pressure) * (actual temp/273.15) and Ndensity* (1.01325/actual pressure) * (actual temp/273.15)]. then convert the litres to m^3 and multiply by the density to get kg/min which is easy to convert to g/s?

or can i just say: normal litres -> convert to normal m^3 ->times normal density to get 'normal' mass flow ->then multiply by (1.01325/pressure)*(actual temp/273.15)

i get two different answers if i do this, and im not sure which one is right...i would guess the first one?

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