Cover Image
close this book Wind systems for pumping water: A training manual
View the document Acknowledgments
View the document Introduction to training
View the document Training guidelines
View the document Objectives for wind system construction training
View the document Session 1 Introduction and objectives
View the document Session 2 History of wind systems
View the document Session 3 Large projects and community analysis
View the document Session 4 Shop safety and tool care
View the document Session 5 Representative drawings for construction
View the document Session 6 Shafts and bearings
View the document Session 7 Strengths and testing
View the document Session 8 Joinery
View the document Session 9 Pumps and pump design
View the document Session 10 Siting considerations
View the document Session 11 Sizing wind water pumping systems
View the document Session 12 Design considerations for pumps and windmills
View the document Session 13 How to design
View the document Session 14 Presentation of designs
View the document Session 15 Construction of wind measuring poles
View the document Session 16 Exportation for wind sites
View the document Session 17 Tower raising
View the document Session 18 Plumbing the wind system
View the document Session 19 Testing installed wind system
View the document Session 20 Presentation of projects
View the document Session 21 Maintenance - preventive and routine
View the document Bibliography
View the document Construction materials list
View the document Tool list for 24 participants
View the document Technical vocabulary
View the document Report on the wind-powered in-service training
View the document Recommendations

Session 11 Sizing wind water pumping systems

TOTAL TIME: 2 Hours

OBJECTIVES: To learn how to size wind systems and pumps using as few formulas and engineering information as possible.

MATERIALS: Blackboard or equivalent

PROCEDURES:

Step 1: 20 minutes

Discuss the "Aermotor Pumping Capacity" chart, using examples.

Step 2: 10 minutes

Have a volunteer or local participant do a sample problem.

Step 3: 10 minutes

Discuss ''Recommended Size, Standard Steel Pipe" chart, using examples.

Step 4: 10 minutes

Have a volunteer or local participant do a sample sizing problem.

Step 5: 10 minutes

Have a volunteer or local participant do a sample combined sizing problem using what they have learned so far.

Trainer Note

Everyone can do the sample problems along with the volunteers.

Step 6: 10 minutes

Discuss any difficulties in using the charts.

Step 7: 45 minutes

Distribute some material regarding a hypothetical windsite which has typical wind conditions for the area. Have participants determine the size of the system to be built.

Trainer Note

Use data gathered in earlier sessions if possible, or data for the site where the windmill is to be installed.

RESOURCES: Copies of Attachments 7-A, 11-A, and 11-B

Attachment 11-A

Sizing Wind Water Pumping Systems

AERMOTOR PUMPING CAPACITY

Diameter of Cylinder (inches)

Gallons pumped per hour in a 15-mile per hour wind

Total height that the water is lifted (in feet)

   

WINDMILL SIZE

   

8 Foot

12 Foot

16 Foot

1.75

150

185

420

1000

2.00

190

140

320

750

2.50

325

94

210

490

3.00

470

68

180

425

4.00

830

39

86

200

5.00

1300

25

55

130

6.00

1875

17

38

85

8.00

3300

Too Big

22

50

NOTE: Pumping ability of the mill decreases about 3% for every additional 1000 feet (300 Meters) above sea level

PUMPING CAPACITY OF SIX-FOOT AERMOTORS

Diameter of Cylinder (inches)

Gallons pumped per hour in a 15-mile per hour wind

Total height that the water is lifted (in feet)

1.75

105

130

2.00

130

95

2.50

225

65

3.00

320

47

4.00

570

27

5.00

900

17

6.00

Too Big

Too Big

8.00

Too Big

Too Big

Attachment 11-B

Sizing Wind Water Pumping Systems

RECOMMENDED SIZES - STANDARD STEEL PIPE

Flow/Gallons per minute

Flow/Gallons per hour

Recommended Pipe Size

Flow/Liters per minute

Flow/Liters per hour

1

60

1/2 inch

4

240

3

180

3/4 inch

11

660

5.5

330

1 inch

21

1260

10

600

1-1/4 inch

38

2280

16

960

1-1/2 inch

61

3660

32

1920

2 inch

122

7320

RECOMMENDED SIZES- PLASTIC PIPE

Flow/Gallons per minute

Flow/Gallons per hour

Recommended Pipe Size

Flow/Liters per minute

Flow/Liters per hour

1.5

90

1/2 inch

6

360

4.5

270

3/4 inch

17

1020

8

480

1 inch

30

1800

15

900

1-1/4 inch

57

3420

24

1440

1-1/2 inch

91

5460

48

2880

2 inch

182

10920

NOTE: These sizes will give fairly low flow speed, which is desirable because it keeps friction losses small. Friction loss in all cases is about 5% of the length of the pipe. This is the same as having to pump 5 feet (or meters) higher for every 100 feet (or meters) of pipe in the system.