A self validating digital coriolis mass flow meter an overview
The answer would seem to be to purchase a flowmeter. Having discovered that there are two types of flow rates (volumetric and mass), it should not be a surprise that some flowmeters measure mass (W) while other flowmeters measure volume (Q). Repeating the equations from Part 1 (for convenience), it can be seen that, assuming A is constant, Q can be determined by measuring the average fluid velocity v. The most common of these measurements measure the velocity head (1/2 rho v x v) to infer the volumetric flow.
However, ground temperature fluctuations between day and night in a given location is very small.
Fluctuations in gasoline temperature cause gasoline density changes.
The magnitude with which these changes affect measurement accuracy can be quantified by performing an uncertainty analysis to determine if temperature compensation is appropriate.
Gallons and liters per unit time are also volumetric flow units.
Mass flow is expressed in units that reflect a mass per unit time. Are the following volumetric or mass liquid flow units? yes/no If you answered volumetric to the first three questions, mass to the next three questions, and yes to the last three questions, you are on track. How does a US gallon of gasoline purchased on a hot summer day in Las Vegas, Arizona compare with a US gallon of gasoline purchased on a cold winter night in Anchorage, Alaska?
Because the ground temperature does not fluctuate very much, the temperature variation of the gasoline will be small throughout the year, so the mass of a gallon of gasoline should not vary much throughout the year from a given tank.