F444 - Abstract: In industries, measuring the flow rates in...

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Abstract: In industries, measuring the flow rates in pipes or channels is common and important processes. In this experiment, flow rates in pipes are measured by using three types of devices. These are: a Pitote tube, a Venturi, and an orifice. Flow rates are measured directly by the Venturi and the orifice meter. While, the Pitote tube used to indicate the point velocity, then the flow rates can be calculated. The volume in this experiment is fixed at 5liter for each run. Then, the flow rates are measured by each device. The errors in comparing flow rates and velocities experimentally and theoretically are ranged between 0.9899 and 6.73%. Also, the discharge coefficient for both the orifice and the Venturi are found as 0.9327 and 1.0156 respectively and the error is 3.63 and 50.43% respectively. INTRODUCTION: In many industries, the measurement of the flow rates in pipes or channels is important for many applications. For this purpose, there are many devices used to measure the flow rate. For example: a Pitot tube, a Venturi, and an Orifice. For measuring “point” velocity, the Pitot tube usually used for this purpose.
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Theoretical Background: 1) Pitot Tube: V 1 = 2 2 3 ( ) / p p - ρ ------------------------------------------- (1) 2) ORIFICE: used to measure the flow rate of fluids Q= 2 ) / ( 1 ( ) 2 1 ( 2 0 A Ao p p Ao C - - -------------------------------------- (2) C O =0.62 --------------- (3) 3) VENTURI : Q CAo p p Ao A = - - 2 1 2 1 2 ( ) ( / ) ------------------------------------------------ (4) C=0.98 ---------------(5) Procedure: The pump tank was filled with water. Then, the manometer was connected to the desired flow meter. Then, the pump was started against the discharge valve. The flow rate was measured by timing the level rise
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This note was uploaded on 09/27/2011 for the course CHEMICAL E CHE 309 taught by Professor M.elgaily during the Fall '09 term at King Fahd University of Petroleum & Minerals.

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F444 - Abstract: In industries, measuring the flow rates in...

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