Analysis:

Table 3. Average Wind speed V, (m/s) for Area A, B and both areas, Average Temperate Tc, (◦C) for Area A, B and both areas at Nose Hill from November 20, 2004 to December 20, 2004 

Trial

Date

Average Wind Speed, V, (m/s) Area A

Average Wind Speed,

V, (m/s)

Area B

Average Wind Speed,

V, (m/s)

Area A and B

Average Temp. Tc, (◦C)

Area A

Average

Temp. Tc, (◦C)

Area B

Average

Temp. Tc, (◦C)

Area A and B

1

Nov 20,04

8.65

7.86

8.26

8.14

8.14

8.14

2

Nov 27,04

1.9

2.1

2.0

-2.00

-2.25

-2.13

3

Dec 1,04

3.96

4.24

4.10

1.00

1.25

1.13

4

Dec 2,04

9.35

9.44

9.40

8.67

7.67

8.17

5

Dec 4,04

5.99

5.79

5.89

-3.43

-3.43

-3.43

6

Dec 7,04

3.3

2.7

3.0

6.57

6.86

6.72

7

Dec 8,04

0.84

0.76

0.80

-13.5

-13.8

-13.7

8

Dec 10,04

0.65

0.74

0.70

1.33

1.00

1.17

9

Dec 12,04

2.2

2.1

2.2

-1.50

-2.25

-1.88

10

Dec 13,04

1.1

1.4

1.3

1.00

1.00

1.00

11

Dec 15,04

0.83

0.97

0.90

2.25

2.00

2.13

12

Dec 16,04

3.0

2.7

2.9

-1.43

-1.43

-1.43

13

Dec 17,04

3.57

3.4

3.5

0.71

1.43

1.07

14

Dec 18,04

2.92

2.8

2.9

4.00

4.00

4.00

15

Dec 19,04

11.1

10.4

10.8

14.3

13.0

13.7

16

Dec 20,04

5.87

5.56

5.72

4.14

4.14

4.14

 Sample Calculation

 Converting Speed from km/hr to m/s:

Windspeed, V, (m/s) at Nose Hill on November 20, 2004 for Area A (Time 1:30PM)

26.0 km/hr* 1000m/ 3600s= 7.22m/s

 

Average Windspeed on a single day:

Average Windspeed, V, (m/s) at Nose Hill on November 20, 2004 for Area A (Time 1:30PM to 2:30PM)

 Average Windspeed= (Total Windspeed/ number of trials)

 (7.22+9.17+8.06+9.72+7.50+8.89+10.0)m/s /7=8.65m/s

 

Average Windspeed for Area A and B on a single day:

(Average windspeed for area A+ average windspeed for area B)/2

(8.65m/s+7.86 m/s)/2 = 8.26m/s

  

Total average wind speed for both areas:

(Trial 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16)m/s /16

(8.26+2.0+4.10+9.40+5.89+3.0+0.80+0.70+2.2+1.3+0.90+2.9+3.5+2.9+10.8+5.72)m/s /16= 4.0m/s

 

Average Temperature for Area A and B on a single day:

(Average temperature for area A+ average temperature for area B)/2

(8.14◦C +8.14◦C)/2 = 8.14◦C

  

Total average temperature for both areas:

(Trial 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16) ◦C /16

(8.14+-2.13+1.13+8.17+-3.43+6.72+-13.7+1.17+-1.88+1.00+2.13+-1.43+1.07+4.00+13.7+4.14) ◦C /16 = 1.80◦C

  

Calculation annual energy output:

1.      Go to http://www.windpower.org/en/tour/wres/pow/index.htm.

2.      Fill in the blanks shown in Figure 2. “Wind Turbine Power Calculator.”

          

Click the thumbnails for the larger image.

The calculator has several blanks that are required in order to calculate the energy output:

Site Data

First of all, there is “Site Data” which has several choices to what area your area is most similar too.  Calgary is most similar to Dustaffnage, Scotland because they are both covered with grasslands.  Next is a blank for the average temperature in degrees Celsius of your area.  The average temperature for Nose Hill is 1.80◦C. 

Air Density Data

Afterwards, the calculator requires the altitude and air pressure of your area.  In Calgary, the altitude is around 1000 m above sea level and the average air pressure is 101.3 kPa.  After these data are inserted, the air density is automatically calculated (1.284177 kg/m3 density). 

        Wind Distribution Data for Site

The first component asks for the “Weibull shape parameter” which is usually around

2 for most places.  This tells how peaked the distribution of wind speed is.  Next, enter the mean speed in m/s, which for Nose Hill is 4.0 m/s.  The “Weibull scale parameter” is then automatically calculated (4.513653).  This indicates how windy the site is, on average.  The height of the wind turbines that is chosen is 50 m.  The roughness length is the determined by the landscape type, which also affects the energy output.  According to the website, Nose Hill’s roughness length is 0.1m and class 2.  An area with these roughness parameters has an agricultural land with many houses, shrubs and plants, or 8 metre tall sheltering hedgerows with a distance of approx. 250 metres.

        Wind Turbine Data

The next part requires information on the type of wind turbine.  The User Example is chosen for the type of wind turbine, making 600kW, with a 5 m/s cut speed (the speed at which the turbine will start running), and with a cut out wind speed of 25m/s (the speed at which the turbine will stop working). The rotor diameter is chosen as 43m, and the hub height is 50m and standard. Then, the energy output would be calculated, which is 318250 kwh/ year.

Number of turbines:

Useable Area= Area of Nose Hill Park/ Fraction of Nose Hill that is suitable 

Useable area= 1127hectares /3 = 375.7hectares

375.7hect= 939.2acres

Number of turbines= The useable area/ the areas for one turbine

                                   939.2acres /30 acres= 31 turbines

The total energy produced by 31 turbines:

Total energy= energy produced by 1 turbine * 31 turbines

                         318250 kwh/ year * 31 turbines=9865750kwh/ year

 

One Household Power Consumption per year:

Power of one household per month * 12 months= total power consumption per year

750 kwh * 12= 9000kwh/year

 

How many households 31 turbines power:

Total Energy from 31 turbines produced in a year/ Power Consumption of one household per year

9865750kwh per year/ 9000kwh per year= 1096 households

 

Percentage of houses powered by Nose Hill turbines:

Number of houses powered by Nose Hill turbines/Total houses in Calgary * 100

1096 houses /332955 houses * 100 = 0.33%

Click the thumbnails to view larger image.

  

                       Figure 1                                                             Figure 2

(Explained in Discussion)