what is the conversion factor for nm3 to kg/hr in air flow

Answers were Sorted based on User's Feedback



what is the conversion factor for nm3 to kg/hr in air flow..

Answer / hermann

1Nm3 (normal m3) of air is a volume of 1m3 of air under
normal conditions of pressure (1 atm = 101.330 kPa) and
temperature (0 deg C = 273 K) (Europe);

Since air can be assumed to behave as an ideal gas under
those conditions, its compressibility factor is 1; so in
the relation:PV=ZmRT; Z=1;R for air= 0.287 kPa.m3/(kg.K);
V=1m3; therefore 101.330*1=1*m*0.287*273; so m = 1.295 kg.

Conversion factor: 1 Nm3/hr = 1.295 kg/hr

Is This Answer Correct ?    166 Yes 44 No

what is the conversion factor for nm3 to kg/hr in air flow..

Answer / kamal joshi

1 Nm3/hr = 1.295 kg/hr

Is This Answer Correct ?    71 Yes 17 No

what is the conversion factor for nm3 to kg/hr in air flow..

Answer / neelakanth pattar

As per ideal gas law
PV = mRT
Data : P-pressure-101.330Kpa at atm
T-273K std
R-0.287 Kpa/Kr.k
V-1 m3

So. 101.330 x 1 = m x 0.287 x 273
m = 1.295 Kg
i.e , 1 Nm3/hr = 1.295 Kg/hr
20 Nm3/hr = 20x1.2929 kg/hr

Is This Answer Correct ?    49 Yes 14 No

what is the conversion factor for nm3 to kg/hr in air flow..

Answer / rajesh gajera

The ideal gas law demonstrates that: PV=nRT in which n=m/M

n= mole number

m= mass or mass flow (kg/h)

V= volume or volumetric flow (m3/hr)

M= molecular weight of the gas for example Molecular weight of nitrogen (N2) =28 kg/kgmole

In Normal conditions according to the latest SI definition P=100 kpa and T=0 C or 273.15 K

R = gas constant =8.314 pa.m3/mol.K

So, PV=(m/M)*R*T or m(kg/h) = (P*V*M)/(R*T)

at Normal conditions then we have:

m(kg/h) = M* 100* V (Nm3/h) / (8.314*273.15) or

m(kg/h) = 0.044 M* V (Nm3/h)

example: 20 Nm3/h of Nitrogen is equal to:

m = 0.044* 28 (molecular weight) * 20 (Nm3/h)

m = 7 kg/h

Is This Answer Correct ?    0 Yes 9 No

Post New Answer

More Instrumentation Interview Questions

What standards are used for earthing of field instruments?

1 Answers  


How to do gas analysers calibration in AUTO and Manually by using zero and span gas?

0 Answers  


Hi..i am B.E. (elect.&comm.)..i m workini in a bio mass power plant as inst. Engg. I want 2 know about growth in big power plant sector..is this field is good 4 me ..i m electronics engg..? Plz plz reply..

2 Answers   Reliance,


What is SLPC & MLPC? How it works?

2 Answers  


Why thermo wells are used? What materials are used in thermo wells?

0 Answers  






How earthing can be checked????

0 Answers  


Which language of programing is popular? how can i learn it ?

0 Answers  


Define the difference between a stable versus an unstable controlled system and some of the tools you might use to be able to detect when this is happening and assumptions used for control system application design that could contribute to instability

0 Answers  


why we use 3 wire rtd direct wiring for temperature measurement instead of temperature transmitter like bearing temperature

0 Answers   ABG Energy,


how does we calibrate a square root flow transmitter ,give an example and explain it step by step like range calculation , calibration hook up series connection , zero check , and how to apply pressure , and if not geting proportional output then what should we do ?

0 Answers  


Explain about relays.. Can we give both AC and DC to the same relay... How it is energising.. Explain its working..

7 Answers   IOCL,


how to check the leak in thermowells

1 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4452)
  • Electrical Engineering Interview Questions Electrical Engineering (16636)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)