CALCULATION OF THE RATE OF FLOW USING ROTOMETER - Computer Programming

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Wednesday, March 30, 2011

CALCULATION OF THE RATE OF FLOW USING ROTOMETER


CALCULATION OF THE RATE OF FLOW USING ROTOMETER



AIM:
To determine the percentage error in Rotometer with the actual flow rate.

 

APPARATUS REQUIRED:


1.      Rotometer setup
2.       Measuring scale
3.       Stopwatch.

FORMULAE:


1. ACTUAL DISCHARGE:
                                    Q act  = A x h/ t                                           (m3 / s)
                       
                        Where:

 

                             A = Area of the collecting tank (m2)
                             h= 10 cm rise of water level in the collecting tank (10-2 m).
                             t  = Time taken for 10 cm rise of water level in collecting tank.

CONVERSION:

 

Actual flow rate (lit / min), Qact = Qact x 1000 x 60    lit /min

 

                                                     Rotometer reading ~ Actual x 100 %     

Percentage error of Rotometer  = 

                                                                                      Rotometer reading                 
                                                                        
=    R ~ Qact / R x 100 %



PROCEDURE:
1.      Switch on the motor and the delivery valve is opened
2.      Adjust the delivery valve to control the rate in the pipe
3.      Set the flow rate in the Rotometer, for example say 50 litres per minute
4.      Note down the time taken for 10 cm rise in collecting tank
5.      Repeat the experiment for different set of Rotometer readings
6.      Tabular column is drawn and readings are noted
7.      Graph is drawn by ploting Rotometer reading Vs percentage error of the Rotometer

RESULT :
            The percentage error of the Rotometer was found to be…….  %

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