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#1




converting normal litres/min to g/s
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? 
#2




Re: converting normal litres/min to g/s
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#3




Re: converting normal litres/min to g/s
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this gives me...yet another different answer. *sigh* when did units get so complicated! thanks for the help! 
#4




Re: converting normal litres/min to g/s
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If you know normal flow and normal density, you can just multiply A few cautions: *Don't mix normal and actual *In actuals, be sure you are using absolute pressure, not gauge (also absolute temperature) *The molecular weight method I provided assumes dry air. The Handbook of Chemistry & Physics has some corrections for moist air if you know the moisture content. (Moist air is slightly lighter, because MW of water is 18). 
#5




Re: converting normal litres/min to g/s
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#6




Re: converting normal litres/min to g/s
Hello.
I have similar problem. I have flow given in normal liters per minute, i must convert to velocity. but i must use the value for simulation, which will be at 600K and 3 bar pressure. what is the correct approach? 
#7




Re: converting normal litres/min to g/s
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normal liters/min x 1.01325 bar/3 bar x 600 K/273.15 K (this assumes ideal gas law is good approximation and compressibility factor can be ignored) Recognize that lier is also a cubic decimeter to convert to cubic volume flow. Divide by area to get average velocity. 
#8




Re: converting normal litres/min to g/s
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#9




Re: converting normal litres/min to g/s
I have been given a fuel usage in a Diesel generator of 200 g per Kwh how much is that in litres per Kwh

#10




Re: converting normal litres/min to g/s
Depends on the density of your diesel, which varies. However, a typical value is 0.84 kg/L or 0.238 L per kWh.

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