Not really. People with a PE feel short of breath but have no problem moving air. People with severe asthma look terrified as they struggle to move air in and out of their lungs. With asthma it is a can't breathe issue rather than with a PE where it's breathing not working as well as expected.
Mass Flow Rate Fluids Floww Equation. The mass flow rate of a system is a measure of the mass of fluid passing a point in the ( Ë m) system per unit time. The mass flow rate is related to the volumetric flow rate as shown in Equation 3-2 where r is the density of the fluid. If the volumetric flow rate is in cubic feet per second and the density is in pounds-mass per cubic foot, Equation 3-2 results in mass flow rate measured in pounds-mass per second. Other common units for measurement of mass flow rate include kilograms per second and pounds-mass per hour.
The most physical way to do the calculation is to consider the air mass (dry air) flow rate balance. Nevertheless it is also allowed to consider the volume flow rate balance when possible. Cases where using the mass flow rate is mandatory are: ï£§ air heating systems, ï£§ air conditioning systems.