Why an electromagnetic flow meter cannot be used for gases,
steam and oil flow measurements?
Answers were Sorted based on User's Feedback
Answer / atul $onawane
electromagnetic flow meter works on the principle of fadays
law of induction. in this voltage induced in the conductor is
proportional to the velocity of fluid(conducting). only
conducting fluids and gases are used .
Is This Answer Correct ? | 4 Yes | 3 No |
Answer / rajesh l parmar
Electromagnetic flow meter works on a principal of
faraday’s law or electromagnetic induction which states
that when a current carrying coinductor moves through a
stationary traverse magnetic field, then e.m.f. is induced
between the ends of the conductor and this e.m.f. is
proportional to relative velocity between conductor and
magnetic field
E = BLV where
B = magnetic induction
L = length of a conductor
V = velocity of the conductor relative to the magnetic
field
It consists of a flow tube inside a pipe which carries a
fluid flow. So when the fluid is passed through the flow
tube, it is visualized as a current carrying conductor
having a length equal to inside diameter of the flow tube.
Now the gas, steam and oils are having low electrical
conductance. So no E.M.F. can be generated in such case. So
electromagnetic flow meters can not be used for metering
gas, oil and steam.
In general electromagnetic flow meters can only be used to
measure the flow of fluid which are sufficient conductive
to generate e.m.f.
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / rajesh l parmar
Electromagnetic flow meter works on a principal of
faraday’s law or electromagnetic induction which states
that when a current carrying coinductor moves through a
stationary traverse magnetic field, then e.m.f. is induced
between the ends of the conductor and this e.m.f. is
proportional to relative velocity between conductor and
magnetic field
E = BLV where
B = magnetic induction
L = length of a conductor
V = velocity of the conductor relative to the magnetic
field
It consists of a flow tube inside a pipe which carries a
fluid flow. So when the fluid is passed through the flow
tube, it is visualized as a current carrying conductor
having a length equal to inside diameter of the flow tube.
Now the gas, steam and oils are having low electrical
conductance. So no E.M.F. can be generated in such case. So
electromagnetic flow meters can not be used for metering
gas, oil and steam.
In general electromagnetic flow meters can only be used to
measure the flow of fluid which are sufficient conductive
to generate e.m.f.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / m n gopinath
electromagnetic meters are generally used with conductive
liquids having conductivity greater than 50 microsiemens/cm.
DM Water, gases,steams and hydrocarbons are non conductive,
hence cannot be used.
..however it can be used in acid or alkali services
Is This Answer Correct ? | 0 Yes | 0 No |
In engineering economy, the future value of first year is FV = PV (1 i). For second year it is FV = PV (1 i) (1 i). For third year it is FV = PV (1 i) (1 i)(1 i) where FV = future value, PV = present value, i = interest rate per period, n = the number of compounding periods. By induction, what is the future value of $1000 for 5 years at the interest rate of 6%?
wt is inhand salary in hpcl as a officer in research and development?????
Chemical Engineering Energy Balance - Please match the term A - E as follow with the stated definition : A. Yield. B. Selectivity. C. Relative saturation. D. Molal saturation. E. Absolute saturation. i. Answer : ? (moles of desired product formed) / (moles that would have been formed if there were no side reactions and the limiting reactant has reacted completely). ii. Answer : ? (moles of desired product formed) / (moles of undesired product formed). iii. Answer : ? (relative humidity 40 % means partial pressure of water vapour equals 4 / 10 of the vapour pressure of water at the system temperature). iv. Answer : ? (moles of vapour) / (moles of vapour dry gas). v. Answer : ? (mass of vapour) / (mass of dry gas).
MASS TRANSFER - EXAMPLE 4.3 : According to Adolf Eugen Fick (1829 - 1901) : rate of diffusion v increases with less wall thickness t, increased area A and decreased molecular weight of a fluid M. The diffusion constant D decreased with increasing M. (a) By assuming v, t, dP, A, M and D changes proportionally of each other, find the equation of v as a function of t, dP, A and D. (b) The ratio of self diffusion constant D, at T = 273 K and P = 0.1 MPa, for gases B and C are 1.604 : 0.155. If only 2 gases exist in such a system : hydrogen and nitrogen, find the type of gas for B and C with reference to their molecular weights M. (c) By using the equation of kinetic energy 0.5 MV = constant where V = square of v, find the ratio of V for B and V for C, or V(B) / V(C), as a function of M(B) and M(C), where M(B) is molecular weight of B and M(C) the molecular weight of C : Graham's Law of Diffusion.
what is extractive distillaion
What is the working of vaccum distilation coloumn in a petroleum refinary?
What types of pneumatic conveying systems are typically used?
NATURAL GAS ENGINEERING - QUESTION 26.2 : (a) The Hyperion sewage plant in Los Angeles burns 8 million cubic feet of natural gas per day to generate power in United States of America. If 1 metre = 3.28084 feet, then how many cubic metres of such gas is burnt per hour? (b) A reservoir of natural gas produces 50 mole % methane and 50 mole % ethane. At zero degree Celsius and one atmosphere, the density of methane gas is 0.716 g / L and the density of ethane gas is 1.3562 mg / (cubic cm). The molar mass of methane is 16.04 g / mol and molar mass of ethane is 30.07 g / mol. (i) Find the mass % of methane and ethane in the natural gas. (ii) Find the average density of the natural gas mixture in the reservoir at zero degree Celsius and one atmosphere, by assuming that the gases are ideal where final volume of the gas mixture is the sum of volume of the individual gases at constant temperature and pressure. (iii) Find the average density of the natural gas mixture in the reservoir at zero degree Celsius and one atmosphere, by assuming that the final mass of the gas mixture is the sum of mass of the individual gases. Assume the gases are ideal where mole % = volume % at constant pressure and temperature.
pls send me model paper of NPCIL for executive trainee. and syllabus of executive trainee 2015.
repected sir i have given gate exam today.......... if i ll get the better rank in that ....what is the next process .....shall i give another one test......or wat....i dint get properlly..... plz help me or mail me on Nish_gasti@yahoo.co.in
How can you separate hydrogen peroxide into hydrogen and oxygen?
What does the catalystic converter on an automobile do?