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Savonius Windmill Powered Water Pump Page 0

MAPA INSTITUTE OF TECHNOLOGY

School of Mechanical and Manufacturing Engineering

ME Lab 2

ABET EXPERIMENT 1

Savonius Windmill Powered

Water Pump

Groups 1 and 2

Marielle Krizanne S. Catral

Engr. Alberto Suralta

Instructor

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which mean that not much wind is necessary to generate the required power to make

work. This allows the windmill to be placed closer to the ground, thus, allowing eas

maintenance and repairs. The materials needed to fabricate the windmill and the pump a

relatively cheap and easy to acquire. These characteristics make the Savonius Windmi

Water Pump best suited for the given application.

LIST OF APPARATUS

1.savonius windmill

2.blower

3.mercury manometer

4.thermometer

5.pitot tube

PROCEDURE

1.Fill the intake reservoir with 500 mL of water.

2.Turn on the blower.

3.Measure the air temperature.

4.Find the wind pressure and speed using a pitot tube and mercury manometer.

5.Blow air through the savonius windmill.

6.Record the time it takes the pump to fill the discharge reservoir with water.7.Find the average pumping rate.

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SET UP OF APPARATUS

AIR BLOWER

SAVONIUS WINDMILL

RESERVOIR

PERFORMING

THE EXPERIMENT

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FINAL DATA SHEET

Wind speed, v = 30.26m/s

Temperature, t = 305K

Air density, = 1.165 kg/m3

Trial Volume (cm3) Time (s)Flow rate

(cm3 /s)

1 500 148 3.38

2 500 148 3.38

3 500 107 4.67

4 500 174 2.87

5 500 174 2.87

Average 3.434

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SAMPLE COMPUTATIONS

Temperature, T = 32 + 273 K = 305 K

Pressure, 4 760

101325 101858.3760

mmHg p Pa Pa

mmHg

Density at the t = 305 K and p = 101.8583 kPa, = 1.165 kg/m 3

Wind speed:

2 21 2

1 1 2 2

2 21

2 2

0101858.3 1.165(9.81)(0) 1.165 101325 1.165(9.81)(0) 1.1652 2

30.26 /

v v p gy p gy

v

v m s

Flow rate: trial 1

33500 3.38 /

148V cm

Q cm st s

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QUESTIONS AND ANSWERS

1. Who invented the savonius windmill? When?

The Savonius windmill was invented by the Finnish engineerSigurd Johannes

Savoniusin 1922.

2. What is a savonius windmill/ wind turbine?

Savonius wind turbines are a type of vertical-axis wind turbine(VAWT), used for

converting the force of thewindintotorqueon a rotatingshaft.

3. What s the use of the S type design of the Savonius Windmill?

Aerodynamically,it is adrag-type device, consisting of two or three scoops.

Looking down on the rotor from above, a two-scoop machine would look like an

"S" shape in cross section. Because of thecurvature,the scoops experience less drag

when moving against the wind than when moving with the wind. The differential

drag causes the Savonius turbine to spin. Because they are drag-type devices,

Savonius turbines extract much less of the wind'spowerthan other similarly-sized

lift-type turbines. Much of the swept area of a Savonius rotor may be near the

ground, if it has a small mount without an extended post, making the overall energy

extraction less effective due to the lower wind speeds found at lower heights.
http://en.wikipedia.org/w/index.php?title=Sigurd_Johannes_Savonius&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Sigurd_Johannes_Savonius&action=edit&redlink=1http://en.wikipedia.org/wiki/Vertical-axis_wind_turbinehttp://en.wikipedia.org/wiki/Windhttp://en.wikipedia.org/wiki/Torquehttp://en.wikipedia.org/wiki/Axlehttp://en.wikipedia.org/wiki/Aerodynamichttp://en.wikipedia.org/wiki/Drag_(physics)http://en.wikipedia.org/wiki/Curvaturehttp://en.wikipedia.org/wiki/Wind_powerhttp://en.wikipedia.org/wiki/Wind_powerhttp://en.wikipedia.org/wiki/Curvaturehttp://en.wikipedia.org/wiki/Drag_(physics)http://en.wikipedia.org/wiki/Aerodynamichttp://en.wikipedia.org/wiki/Axlehttp://en.wikipedia.org/wiki/Torquehttp://en.wikipedia.org/wiki/Windhttp://en.wikipedia.org/wiki/Vertical-axis_wind_turbinehttp://en.wikipedia.org/w/index.php?title=Sigurd_Johannes_Savonius&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Sigurd_Johannes_Savonius&action=edit&redlink=1

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DISCUSSION

The savonius windmill was blown by an air blower with a velocity of 30.26m/

its average flow rate using a centrifugal pump is 3.434.

However, improvement of the prototype can still be done. For instance, a bettegear train may be used to further increase the speed of the impeller shaft. An improve

pump can also be considered for better suction force. The windmill may be furthe

enhanced by increasing its size for higher torque and possibly speed output.

CONCLUSIONThe tests done were able to demonstrate that it is possible to use a Savonius

Windmill to power a centrifugal pump. Normally, centrifugal pumps operate at speeds o

at least 1000rpm but the researchers have proven that a centrifugal pump powered by

windmill will still pump water. The key to the success of the design is in exploiting th

high-torque output of the windmill. The windmill does not turn very fast as compared t

horizontal-axis windmills but the high-torque output means it can lift a fairly large amou

of water.

REFERENCES

http://en.wikipedia.org/wiki/Savonius_wind_turbine
http://en.wikipedia.org/wiki/Savonius_wind_turbinehttp://en.wikipedia.org/wiki/Savonius_wind_turbinehttp://en.wikipedia.org/wiki/Savonius_wind_turbine

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PRELIMINARY DATA SHEET

Wind speed, v = 30.26m/s

Temperature, t = 305K

Air density, = 1.165 kg/m3

Trial Volume (cm3) Time (s)Flow rate

(cm3 /s)

1 500 148 3.38

2 500 148 3.38

3 500 107 4.67

4 500 174 2.87

5 500 174 2.87

Average 3.434

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