The Venturi flow model is based on the principle of conservation of energy. It uses the change in pressure across a constriction in a pipe to calculate the flow rate of a fluid. As the fluid flows through the constriction, its velocity increases, causing a decrease in pressure. This pressure difference can then be used to calculate the flow rate using the Bernoulli's equation.
A differential pressure sensor is used to measure the pressure difference across the constriction in the pipe. This pressure difference is essential in calculating the flow rate using the Venturi flow model. The accuracy and precision of the differential pressure sensor directly affect the accuracy of the calculated flow rate.
Air flow is calculated by first measuring the pressure difference across the constriction in the pipe using a differential pressure sensor. This pressure difference is then used in the Venturi flow equation, along with other parameters like pipe diameter and fluid properties, to calculate the flow rate of air.
One advantage of using a Venturi flow model is its accuracy. This model takes into account the change in pressure and velocity of the fluid, which makes it more accurate than other flow measurement methods. Additionally, it is not affected by changes in fluid density, making it suitable for various applications. It also has a simple design and is relatively easy to install and maintain.
The accuracy of a Venturi flow model can be affected by factors such as the accuracy of the differential pressure sensor, the condition of the pipe (e.g. presence of debris or corrosion), and the temperature and density of the fluid. Changes in these parameters can lead to errors in the calculated flow rate.