Cooling Tower Fan Calculation

Utility

11.08.09 Annexture-A

OBSERVATION SHEET OF M/s PAHARPUR MAKE CT FAN NO 1 IN 23 MW BHEL MAKE COOLING TOWER:

III TG LOAD CW INLET TEMPERATURE CW OUTLET TEMPERATURE

ΔT

15.6 MW O 30 C O 37 C O 7 C

II

IV

I

N

Sr No

Distance in inches (mm)from the Outer surface I

1 2 3 4 5

Average Velocity (m/sec) A

Velocity of Air Flow (m/sec) II III IV

Average Average Velocity (ft/min) Velocity (m/min) B=A x 196.8 C=A x 60

5.4 ( 137) 17(432) 30.30(770) 46.30(1176) 68(1727)

2.6 7.4 8.4 10.2 10.7

8.7 12.1 11.6 12.4 11.2

8.3 10.2 10.0 10.3 10.5

4.2 9.9 10.6 10.7 9.9

6.0 9.9 10.2 10.9 10.6

1171.0 1948.3 1997.5 2145.1 2081.2

357.0 594.0 609.0 654.0 634.5

Avg.

7.9

11.2

9.9

9.1

9.5

1868.6

569.7

Diameter of fan (D0)

;

216 inch = 18 feet

Area of fan ((Π D 02)/4)

;

254.34 sq. ft

Total Effective Area (Af)

; ;

4.527 sq. ft 249.813 sq. ft

0.421 m (ft  x .0929) 2 23.205 m

Air flow in CFM (Bavg x Af)

;

466805 CFM

13220 m  /min

Blade Angle Electrical Amps (I)

;

13.5/14 48.5 Amps

Power Factor(cos Φ)

; ;

0.878 420 V

; ;

30.98 kW 30.88 kW

5.486 m 2

23.626 m

Existing Hub Area

Voltage (V)

Power Consumption (√3xVxIxcosΦ) Power Consumption (kW meater)

;

o

2

3

2

Utility

11.08.09 Annexture-A

OBSERVATION SHEET OF M/s PAHARPUR MAKE CT FAN NO 2 IN 23 MW BHEL MAKE COOLING TOWER:

TG LOAD CW INLET TEMPERATURE CW OUTLET TEMPERATURE

ΔT

Sr No

1 2 3 4 5

Distance in inches (mm)from the Outer surface

IV

15.6 MW O 30 C O 37 C O 7 C

III

I

II

N

Velocity of Air Flow (m/sec) I II III

IV

Average Velocity (m/sec) A

Average Average Velocity (ft/min) Velocity (m/min) B=A x 196.8 C=A x 60

5.4 ( 137) 17(432) 30.30(770) 46.30(1176) 68(1727)

5.9 8.7 9.1 10.4 7.4

2.2 5.3 10.5 11.4 9.9

10.4 11.3 12.0 12.0 9.6

6.9 9.2 10.2 10.9 9.0

6.4 8.6 10.5 11.2 9.0

1249.7 1697.4 2056.6 2199.2 1766.3

381.0 517.5 627.0 670.5 538.5

Avg.

8.3

7.9

11.1

9.2

9.1

1793.8

546.9

Diameter of fan (D0)

;

Area of fan ((Π D 02)/4)

;

254.453 sq. ft

;

4.527 sq. ft

Total Effective Area

;

249.926 sq. ft

Air flow in CFM (Bavg x Df 

;

448326 CFM

Blade Angle Electrical Amps (I)

;

12.5/13 48.4 Amps

Power Factor(cos Φ)

; ;

0.855 420.4 V

; ;

30.13 kW 29.84 kW

216 inch = 18 feet

5.486 m 23.626 m

2

Existing Hub Area

Voltage (V)

Power Consumption (√3xVxIxcosΦ) Power Consumption (kW meater)

;

o

2

2

0.421 m (ft  x .0929) 2

23.205 m 3 12691 m  /min

Utility

16.09.09

REPORT SHEET OF CT FAN NO 3 OF 23 MWTG COOLING TOWER:

TG LOAD CW INLET TEMPERATURE CW OUTLET TEMPERATURE

ΔT 1) 2)

15-Sep 10.3 MW O 30 C O 35 C O 5 C

I

16-Sep 10.0 MW O 30 C O 35 C O 5 C

IV

II

III

N

CT FAN NO 4 STOPPED AND ANGLE OF BLADES CHECKED.ANGLE OF BLADES FOUND TO BE 11 DEGREE. CT FAN NO 3 STOPPED AND ANGLE OF BLADES CHECKED.ANGLE OF BLADES CORRECTED TO 11 DEGREE. FAN 15-Sep 16-Sep BLADE ANGLE ANGLE NO (DEG) (DEG) 1 12 11 2 11 11 3 13 11 4 12 11 5 13 11 6 13 11

3)

CT FAN NO 3 STARTED AT 11:30AM & VELOCITY OF AIR FLOW MEASURED

SL No

Distance in inches (mm)from the Outer surface

Velocity of Air Flow (m/sec) II III

I 1 2 3 4 5

5.4 17 30.3 46.3 68 Avg.

15-Sep

16-Sep

15-Sep

16-Sep

7.1 9.5 11.2 11.9 9.1 9.8

9.4 11.4 10.1 11.7 7.3 10.0

6.8 8.0 8.9 10.3 9.3 8.7

9.5 12.5 10.7 11.6 7.8 10.4

Area of fan ((Π D02)/4) Existing Hub Area Total Effective Area Air flow in CFM TIME Electrical Amps (I)

Power Factor(cos Φ) Voltage (V)

Power Consumption (√3xVxIxcosΦ) Power Consumption (kW meater)

DY.MGR(UTY)

15-Sep 254.34 sq. ft 4 sq. ft 250.34 sq. ft 484195 CFM 37 0.804 420 21.64 21.77

Amps V kW kW

15-Sep

8.0 11.6 12.7 11.3 9.5 10.6

Average Velocity (m/sec) A

IV

16-Sep

15-Sep

16-Sep

15-Sep

16-Sep

7.4 9.2 9.8 11 8.6 9.2

9.0 11.2 11.8 11.1 8.4 10.3

7.2 11.1 10.5 11.2 7.4 9.5

7.7 10.1 11.2 11.2 9.1 9.83

8.4 11.1 10.3 11.4 7.8 9.77

16-Sep 254.34 sq. ft 4 sq. ft 250.34 sq. ft 481338 CFM 11:30 32.7 Amps 0.77 420 V 18.32 kW 18.53 kW

16-Sep

16-Sep

15:30 33.1 Amps 0.8 420 V 19.26 kW 19.4 kW

17:30 32.9 Amps 0.77 420 V 18.43 kW 18.53 kW

Average Velocity (ft/min) B=A x 196.8 15-Sep

1515.4 1981.8 2194.3 2194.3 1785.0 1934.2

16-Sep

1648.2 2174.6 2022.1 2238.6 1530.1 1922.7

Utility

11.08.09 Annexture-A

OBSERVATION SHEET OF M/s ENCON MAKE ENERGY EFFICIENT FRP FAN CT FAN NO 4 IN 23 MW BHEL MAKE COOLING TOWER: I IV TG LOAD 15.6 MW O 30 C CW INLET TEMPERATURE O CW OUTLET TEMPERATURE 37 C O 7 C ΔT II III N

Sr No

Distance in inches (mm)from the Outer surface I

1 2 3 4 5

Velocity of Air Flow (m/sec) II III

IV

Average Velocity (m/sec) A

Average Velocity (ft/min) B=A x 196.8

Average Velocity (m/min) C=A x 60

5.4 ( 137) 17(432) 30.30(770) 46.30(1176) 68(1727)

7.7 9.0 9.2 8.6 6.0

8.7 10.1 11.3 10.6 6.9

2.7 5.5 8.7 9.3 9.9

3.3 6.6 10.8 10.2 9.2

5.6 7.8 10.0 9.7 8.0

1102.1 1535.0 1968.0 1904.0 1574.4

336.0 468.0 600.0 580.5 480.0

Avg.

8.1

9.5

7.2

8.0

8.2

1616.7

492.9

Diameter of fan (D 0)

;

Area of fan ((Π D 02)/4)

;

254.453 sq. ft

;

4.527 sq. ft

Total Effective Area

;

249.926 sq. ft

Air flow in CFM (B avg x Df 

;

404059 CFM

Blade Angle Electrical Amps (I)

;

Power Factor(cos Φ)

; ;

0.754 421.0 V

; ;

16.99 kW 16.73 kW

216 inch = 18 feet

5.486 m 2

23.626 m

Existing Hub Area

Voltage (V)

Power Consumption (√3xVxIxcosΦ) Power Consumption (kW meater)

;

o

12 30.9 Amps

2

2

0.421 m (ft  x .0929) 2

23.205 m

3

11438 m  /min

Utility

11.08.09 Annexture-A

OBSERVATION SHEET OF M/s ENCON MAKE ENERGY EFFICIENT FRP FAN IN 23 MW BHEL MAKE COOLING TOWER:

Sr No

1 2 3 4 5

Distance in inches (mm)from the Outer surface

Velocity of Air Flow (m/sec) I II III

Average Velocity (m/sec) A

IV

5.4 ( 137) 17(432) 30.30(770) 46.30(1176) 68(1727) Avg.

#DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0!

#DIV/0!

#DIV/0! #DIV/0!

#DIV/0!

Diameter of fan (D 0)

;

Area of fan ((Π D02)/4)

;

254.453 sq. ft

; ; ;

4.527 sq. ft 249.926 sq. ft #DIV/0! CFM

Blade Angle Electrical Amps (I)

;

12

;

Amps

Power Factor(cos Φ)

; ;

V

; ;

0 kW kW

216 inch = 18 feet

Existing Hub Area

Total Effective Area Air flow in CFM (B avg x Df 

Voltage (V)

Power Consumption (√3xVxIxcosΦ) Power Consumption (kW meater)

o

T FAN NO4

Average Velocity (ft/min) B=A x 196.8 #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0!