1. EXPERIMENTAL CLASS 3. FLOW MEASUREMENT 2015.04.03

2. EXPERIMENT 3. FLOW MEASUREMENT  Local Flow measurement  Pitot Tube  Using Differential Pressure This equation provides the relation between pressure and velocity.

3. EXPERIMENT 3. FLOW MEASUREMENT  Average(Global) Flow measurement  Pressure Difference  Orifice, Venturi, Nozzle, Elbow tube, etc.  Linear Flow Meter  Turbine Meter, Vortex Meter, Ultrasonic Flow Meter, etc.  Force Balance  Rotameter

4. EXPERIMENT 3. FLOW MEASUREMENT  Using Pressure Difference : Orifice Plate & Venturi  Using pressure difference between the front and the back of the devices

5.  Using Linear Velocity : Ultrasonic Flowmeter  It detects the flow rate using Ultrasonic wave,  In the secondary system of PWRs, the other flow sensors suffer fouling problem erroneously indicating high feed water flow.  It can cost a plant nearly 3 percent of power output. Because of this problem, many plants have installed ultrasonic flow sensors.  For this 3 percent gain in plant power output, plants must pay about $2 million (in 2006) to implement an ultrasonic flow sensor. EXPERIMENT 3. FLOW MEASUREMENT

6.  Using Linear Velocity : Vortex meter  If an objective, such as a cylinder, is put in flowing fluid, then vortex happens.  This vortex generates signal and the vortex flow meter detect this vortex and the flow rate can be measured EXPERIMENT 3. FLOW MEASUREMENT

7.  Using Force Balance : Rotameter  Gravity – Buoyancy= Pressure drop due to flow  Since gravity is fixed and buoyancy force is constant for the given flow rate, the pressure drop due to flow rate determines the location of the float

8. EXPERIMENT 3. FLOW MEASUREMENT