Announcement

Announcement Module
Collapse
No announcement yet.

Please help to convert flowrate kg/minute to cubic meter

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts

  • Please help to convert flowrate kg/minute to cubic meter

    kindly help me to solve this conversion problem.

    I'm selling CNG compressed natural gas- methane;
    the most dispenser standard are using kg/minute - for flowrate unit.
    and i want to convert the unit to normal cubic meter for our standard volume.

    - what's the formula ?
    - what the common for methane gas density

    if we are not sure, lets assume that the density of methane is 0.667kg/m3

    so i would like to know the volume;
    1 kg/minute = ??? NM3

    Highly appreciated for your help

  • #2
    Re: Please help to convert flowrate kg/minute to cubic meter

    Originally posted by mac daddy
    kindly help me to solve this conversion problem.

    I'm selling CNG compressed natural gas- methane;
    the most dispenser standard are using kg/minute - for flowrate unit.
    and i want to convert the unit to normal cubic meter for our standard volume.

    - what's the formula ?
    - what the common for methane gas density

    if we are not sure, lets assume that the density of methane is 0.667kg/m3

    so i would like to know the volume;
    1 kg/minute = ??? NM3

    Highly appreciated for your help
    The volume of a gas depends on temperature and pressure. Since you want normal cubic meters, this implies the conditions of measurement are 101.325 kPa and 0 C, You need a density measured at these conditions or at least at known conditions you can convert to these (with ideal gas equation)

    The second problem is natural gas is mostly, but not purely, methane. The impurities are enough that the average molecular weight and density are noticably different from pure methane.

    At 101.325 kPa and 0 C, this site http://www.engineeringtoolbox.com/ga...ity-d_158.html
    gives a density of 0.717 kg/m for pure methane, and 0.7 - 0.9 kg/m as typical range for natural gas. For a rough conversion, you could use midpoint, 0.8, but for a conversion that meets "legal for trade" accuracy, you probably need a measured density and quantitative chemical analysis (if you want heat content) for the gas you are selling.

    Using the 0.8 figure, 1 kg/min is also 1.25 m/min; just divide by the (hopefully correct) density value.

    Comment


    • #3
      Re: Please help to convert flowrate kg/minute to cubic meter

      Dear John,

      appreciate for your replied

      Comment


      • #4
        Re: Please help to convert the following

        The calorific value is app. 10.000 kcal/kg gas or 8.000 kcal/Nm3.

        1.400.000 x 800 / 10.000 kg/day = 112.000 kg/day or 112 ton/day

        Would like to know the value in m3.

        Thaks very much
        juanpablogimenezj@gmail.com

        Comment


        • #5
          Re: Please help to convert the following

          Originally posted by Unregistered
          The calorific value is app. 10.000 kcal/kg gas or 8.000 kcal/Nm3.

          1.400.000 x 800 / 10.000 kg/day = 112.000 kg/day or 112 ton/day

          Would like to know the value in m3.

          Thaks very much
          juanpablogimenezj@gmail.com
          Given that you have both heat content values, you can determine the density: 8000 kcal/Nm x 1 kg/10000 kcal = 0.8 kg/Nm

          112000 kg/day x 1 Nm/0.8 kg = 140 000 Nm/day.

          Comment


          • #6
            Re: Please help to convert flowrate kg/minute to cubic meter

            if i have a garages room ( 20m*12m*2.25m),i need ur help to calculate the air flow required in meter cubedper houre

            Comment


            • #7
              Re: Please help to convert flowrate kg/minute to cubic meter

              Originally posted by alaa alamin View Post
              if i have a garages room ( 20m*12m*2.25m),i need ur help to calculate the air flow required in meter cubedper houre
              The volume of your garage is just the product of those dimensions, 540 m. However, different building codes require different rates of air exchange per hour. Two exchanges per hour would require 1080 m/h.

              Comment


              • #8
                Re: Please help to convert flowrate kg/minute to cubic meter

                Dear mac daddy and JohnS,
                THere used to be a conversion table on the Emerson Web site for the micromotion meter.
                There is a lot of pressure on CNG equipment makers to rate their Cv factors so one can calculate the pressure needed to dispense gas at the 150kg/min rate the meteres are designed for.

                Comment


                • #9
                  Re: Please help to convert flowrate kg/minute to cubic meter

                  THe Emerson Micromotion CNG50 data sheet gives 7550Nm3/hr equal to 100kg/min.

                  Comment

                  Working...
                  X