RESULT:

Experiment 1: Determination of the operation and characteristic of mass flowmeter and rotometer

PRESSUREPT1 (bar)MASS FLOW METER, FT1 (LPM)ROTOMETER(LPM)TEMPERATURETT1 (C)MASS FLOW METER FT1 AT STANDARD CONDITIONROTOMETER READING AT STANDARD CONDITION

1.000.00024.718.9520.34

0.7412.51024.719.8321.30

0.6922.72024.635.0137.56

0.6834.13024.452.3156.14

0.6544.04024.366.3471.18

0.6254.35024.380.3886.26

PRESSUREPT1 (bar)MASS FLOW METER, FT1 (LPM)ROTOMETER(LPM)TEMPERATURETT1 (C)MASS FLOW METER FT1 AT STANDARD CONDITIONROTOMETER READING AT STANDARD CONDITION

2.000.0024.429.7631.94

1.8416.01024.441.3644.39

1.7831.32024.479.2185.01

1.7445.73024.2114.08122.43

1.7158.64024.1144.73155.33

1.6862.25024.1151.93165.05

EXPERIMENT 2: Determination of the operation and the characteristic of venture meter

PRESSUREPT1 (bar)ROTOMETER(LPM)TEMPERATURETT1 (C)DIFFERENTIAL PRESSURE DPTI(mbar)CALCULATED FLOW RATE, Q(LPM)

1.00024.322.972

0.801024.422.664

0.752024.333.140

0.713024.343.544

0.694024.353.904

0.685024.364.220

PRESSUREPT1 (bar)ROTOMETER(LPM)TEMPERATURETT1 (C)DIFFERENTIAL PRESSURE DPTI(mbar)CALCULATED FLOW RATE, Q(LPM)

2.00024.624.203

1.821024.624.010

1.752024.634.820

1.713024.645.495

1.684024.656.100

1.645024.666.600

EXPERIMENT 3: DETERMINATION OF THE OPERATION AND CHARACTERISTIC OF ORIFICE PLATE

PRESSUREPT1 (bar)MASS FLOW METER, FT1 (LPM)ROTOMETER(LPM)TEMPERATURETT1 (C)DIFFERENTIAL PRESSURE DPTI(mbar)CALCULATED FLOW RATE, Q(LPM)

1.000.00024.722.971

0.720.001024.722.521

0.640.002024.732.914

0.630.003024.764.088

0.600.004024.574.307

0.580.005024.6115.310

PRESSUREPT1 (bar)MASS FLOW METER, FT1 (LPM)ROTOMETER(LPM)TEMPERATURETT1 (C)DIFFERENTIAL PRESSURE DPTI(mbar)CALCULATED FLOW RATE, Q(LPM)

2.000.00024.824.203

1.850.001024.824.041

1.780.002024.634.856

1.760.003024.666.830

1.710.004024.687.771

1.690.005024.6119.062

Experiment 1: Determination of the operation and characteristic of mass flow meter and rotameterThe mass flow meter, FT1 unit LPM is defined at conditions 0 C, 1.0132 bar (abs).

Pressure of compressor at 1 bar:

V1=18.95

V1=19.83

V1=35.01

V1=52.31

V1=66.34

V1=80.38

The rotameter unit LPM is defined at condition 20 C, 1.0132 bar (abs)

V1=20.34

V1=21.30

V1=37.56

V1=56.14

V1=71.18

V1=86.26

For pressure compressor at 2 and 3 bar just follow this calculation to find V1.

Experiment 2: Determination of the operation and characteristic of venturi meterPressure of compressor 1 bar:D1=0.0127 mD2=0.00635 m = =0.5E = (1- 4)-1/2 =(1-0.54)-1/2 =1.0328Density, =

= 1.17 kg/m3Q (at PT1 1.00 bar) = = = 2.972 LPM

=

= 0.94 kg/m3Q(at 0.80 bar) = = = 2.664 LPM

=

=0.87 kg/m3Q(at 0.75 bar) = = = 3.14LPM

p=

=0.832 kg/m3Q(at 0.71 bar) = = =3,544 LPM

=

=0.808 kg/m3Q(at 0.69 bar) = = =3.904 LPM

=

=0.786 kg/m3Q(at 0.68 bar) = = =4.22LPM

For pressure compressor at 2 bar just follow this calculation to find Q.

Experiment 3: Determination of the operation and characteristic of orifice meterPressure of compressor 1 bar:D1=0.0127 mD2=0.00635 m = =0.5E = (1- 4)-1/2 =(1-0.54)-1/2 =1.0328 =

=1.169 kg/m3Q (at PT1 1.00 bar) = = = 2.971 LPM

For pressure compressor at 2 bar just follow this calculation to find Q.

DISCUSSION: From the experiment conducted in gas flow meter, there are 2 main objectives to achieve. Firstly is to study the operation and characteristic of flow rate by utilize mass flowmeter and rotameter. After that is to compare flow rate measurement. During conducting this experiment ,gas flow measurement bench is used to study the fluid flow of compressible gas. This equipment, gas flow measurement bench is used to study the fluid flow of compressible gas. This equipment use 3 different measuring device which is orifice meter, venture meter and rotameter. This measurement give different type of result respectively which measure the flowrate of compressible gas that flow through the device. The expected result from the orifice meter will result in the increase in fluid velocity and decrease in pressure due to the smaller area of the orifice plate. Besides, venture meter exhibit the same characteristic as orifice. From the experiment 3 obtained, it shows that as flowrate of the gas increase, the pressure of the gas decrease respectively with the pressure tested at 1 bar and 2 bar. The same result will obtained when conducting experiment 2, the pressure will decrease as flowrate increase.For rotameter, it has rotating free float which indicating element. As flow commence, the float rises until upward and buoyancy force on it are balance by its weight and the float will rise in a short distance if the rate of flow is small and vice versa. The level of the float are used in measured of flow rate. From the result of experiment 1, the mass of flowmeter and rotameter reading at standard condition for each pressure increment at 1 bar and 2 bar show the decrease in pressure as flow rate of gas compressor increase.From the experiment conducted, flow rate measurement was obtained by utilize mass flowmeter and rotameter. Experiment 1 till 3 are conducted by utilize the rotameter by 5,10,20,30,40,50 LPM respectively. The result obtained shows that each increment of rotameter reading will result in increasing of flow rate measurement. For instance, in experiment 2 for rotameter reading at 10 LPM, the calculated flow rate gives 2.664 LPM whereas for rotameter reading 30 LPM, the calculated flowrateis 3.544 LPM. The same result will obtained in experiment 1 and 3.

CONCLUSION: The objectives of this experiment is satisfied which is to obtain the flow rate measurement by utilizing mass flowmeter and rotameter and to compare flow rate measurement flow rate.Both mass flow meter and rotameter increase with decreasing of pressure and temperature.The mass flow meter at standard condition is higher than rotameter at standard condition. The characteristics and operation at venture meter, the calculated flow rate increase when decreasing of the pressure. Furthermore, the operation at orifice meter increase with decreasing of pressure and temperature. The accurate mass flow measurement of gas is difficult to obtain because the gas is a compressible fluid. This concluded that the volume of a fixed mass of gas and rotameter depends upon the pressure and temperature.