Converting Units?!?!

crisco10

Im posted this in the engineering forum also but maybe u scientists could help also...

Okay, so im trying to convert some units here and need someone to check for me, the answers i am getting are silly!

I have values in pounds/million cubic feet and want to convert to kt/Mt. the density of the gas im using is 0.8 kg/m^3.

So here is what i have done:

X lbs/mmcf = X * (0.000453592/(0.8*28316.8466*10^-3))kt/Mt

is that correct? please help!!

Gurgle

crisco10 wrote: »

I have values in pounds/million cubic feet and want to convert to kt/Mt.

What are kt and Mt ?

Pounds / million cubic feet is an expression of density, though its an odd one. You already have the density in kg/m3, so what are you trying to work out?

crisco10

Gurgle wrote: »

What are kt and Mt ?

Pounds / million cubic feet is an expression of density, though its an odd one. You already have the density in kg/m3, so what are you trying to work out?

Well the lb/mmcf is an emission factor, so for example 5lb/mmcf would indicate you get 5 lbs of emissions for every million cubic feet you burn.
But i want that in terms of for every MegaTonne of fuel burned you get x kilotonnes of emissions...

nesf

crisco10 wrote: »

Well the lb/mmcf is an emission factor, so for example 5lb/mmcf would indicate you get 5 lbs of emissions for every million cubic feet you burn.
But i want that in terms of for every MegaTonne of fuel burned you get x kilotonnes of emissions...

I might be wrong here, but I'd just convert first from imperial to metric (ie kgs per cubic metre) and then convert to mega tonnes, assuming you know the average density of what's being burned. Doing it in two steps simplifies things greatly. Just be careful with your powers when doing the initial conversion and work it all out at 10^3 or something like that before expressing it as kilotons per megaton etc.

crisco10

nesf wrote: »

I might be wrong here, but I'd just convert first from imperial to metric (ie kgs per cubic metre) and then convert to mega tonnes, assuming you know the average density of what's being burned. Doing it in two steps simplifies things greatly. Just be careful with your powers when doing the initial conversion and work it all out at 10^3 or something like that before expressing it as kilotons per megaton etc.

Thats what i did, i just need someone to check my maths!! The answers i get are believable but a bit wrong looking...

ZorbaTehZ

Im getting X [0.45359] kt / [0.0283168].[0.8].[10^-3] Mt which I think is the same as what you posted.