Copy of Service Air Requirement.xls

7/27/2019 Copy of Service Air Requirement.xls

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Sr. No. Service air consumption list Unit

1 Service air for RAPH A Air Motor NM3/min

2 Service air for RAPH B Air Motor NM3/min

3 Service air for RAPH A cleaning NM3/min

4 Service air for RAPH B cleaning NM3/min

5 Service air for Coal feeder A Cleaning NM3/min

6 Service air for Coal pulveriser A Cleaning NM3/min

7 Service air for Coal feeder B Cleaning NM3/min

8 Service air for Coal pulveriser B Cleaning NM3/min

9 Service air for Coal feeder C Cleaning NM3/min

10 Service air for Coal pulveriser C Cleaning NM3/min

11 Service air for Coal feeder D Cleaning NM3/min12 Service air for Coal pulveriser D Cleaning NM3/min

13 Service air for Coal feeder E Cleaning NM3/min

14 Service air for Coal pulveriser E Cleaning NM3/min

15 Service air for Coal feeder F Cleaning NM3/min

16 Service air for Coal pulveriser F Cleaning NM3/min

17 Service air for Coal feeder G Cleaning NM3/min

18 Service air for Coal pulveriser G Cleaning NM3/min

19 Service air for Coal feeder H Cleaning NM3/min

20 Service air for Coal pulveriser H Cleaning NM3/min

21 Service air for Coal Pulveriser A coal sampling purging NM3/min

22 Service air for Coal Pulveriser B coal sampling purging NM3/min

23 Service air for Coal Pulveriser C coal sampling purging NM3/min

24 Service air for Coal Pulveriser D coal sampling purging NM3/min

25 Service air for Coal Pulveriser E coal sampling purging NM3/min

26 Service air for Coal Pulveriser F coal sampling purging NM3/min

27 Service air for Coal Pulveriser G coal sampling purging NM3/min

28 Service air for Coal Pulveriser H coal sampling purging NM3/min

29 Service air for ID Fan A cleaning NM3/min

30 Service air for ID Fan B cleaning NM3/min

31 Service air for FD Fan A cleaning NM3/min

32 Service air for FD Fan B cleaning NM3/min

33 Service air for PA Fan A cleaning NM3/min

34 Service air for PA Fan B cleaning NM3/min35 Service air for LDO Air Automisation at 23.1 m EL NM3/min

36 Service air for LDO Air scavanging at 23.1 m EL NM3/min

37 Service air for LDO Air Automisation at 27.0 m EL NM3/min








43 Service air for boiler elevation 38.8 m EL NM3/min







50 Service air for boiler elevation 61.7 m EL NM3/min51 Service air for boiler elevation 64.4 m EL NM3/min









62

Service air for Instrumentation furnace Gas Temperature

Probe purging & ASLD Purging NM3/min63 Service air for Auxiliary Boiler LDO atomisation NM3/min

64 Service air for ESP NM3/min

Total NM3/min



Service Air Qty. per

equipment

Service Air Qty. per unit

of 660 MW

Continous Intermittant Continous7.5 7.50 - - -

7.5 7.50 - - -

2 2 - - -

2 2 - - -

0.36 0.36 - - -

2 2 - - -

0.36 0.36 - - -

2 2 - - -

0.36 0.36 - - -

2 2 - - -

0.36 0.36 - - -2 2 - - -

0.36 0.36 - - -

2 2 - - -

0.36 0.36 - - -

2 2 - - -

0.36 0.36 - - -

2 2 - - -

0.36 0.36 - - -

2 2 - - -

1 1 - √ -

1 1 - √ -

1 1 - √ -

1 1 - √ -

1 1 - √ -

1 1 - √ -

1 1 - √ -

1 1 - √ -

1 1 - - -

1 1 - - -

1 1 - - -

1 1 - - -

1 1 - - -

1 1 - - -29.28 29.28 - √ -

21.96 21.96 - √ -

29.28 29.28 - √ -

21.96 21.96 - √ -

29.28 29.28 - √ -

21.96 21.96 - √ -

29.28 29.28 - √ -

21.96 21.96 - √ -

Normal Operation Maint



4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

4 4 - - -

5 5

√ - -

11.2 11.2 - - -

4 4 - - -

345.0 345.0 5 212.96 0

90.184



Intermittant Continous Intermittant Continous Intermittant- - √ - -

- - √ - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√

- - - -√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

- - - - -

- - - - -

- - - - -

- - - - -

- - - - -

- - - - -

- - - - -

- - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√- - - -

- - - - √

- - - - √

- - - - √

- - - - √

- - - - √

- - - - √

- - - - √

- - - - √

nance Emergency Start Up

Service Air Requirement



√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

√ - - - -

- - - - -

- - - - √

√ - - - -

95.88 15.00 216.16

38.352 6 216.16



Density Calculation at rated pressure & temperature

1 Pressure =

=

2 Temperature =

=

3 Gas constant R =

4 Density m/v =

Density Calculation at NTP condition

1 Pressure =

=

2 Temperature =

=

3 Gas constant R =

4 Density m/v =

Converion of Air Volumetric flow rate from rated Condition to NTP

1 Air Consumption Per RAPH as per LTH free air =

2 Air Consumption Per RAPH as per Alstom at compressor discharge P & T =

3 Air Receiver capacity per RAPH for 10 minute storage =

Total service air requirement for RAPH air motor =


1 Pressure =

=

2 Temperature =

=

3 Gas constant R =

4 Density m/v =


1 Pressure =

=

2 Temperature =

=3 Gas constant R =

4 Density m/v =


1 Air Consumption Per RAPH as per LTH free air =

RAPH AIR MOTOR SERVICE AIR REQUIREMENT



Total service air requirement for RAPH air motor =



0.983 bar 1

98300 N/m2

27 Deg c 2

300 Deg K

287 J/Kg K 3

1.141696 Kg/m3 4

1.01325 bar 1

101325 N/m2

0 Deg c 2

273 Deg K

287 J/Kg K 3

1.293219 Kg/m3 4

0.1 m3/sec 1

0.017366 m3/sec 2

10.4198 m3 3

0.088283 NM3/sec

5.296995 NM3/min

11.12 NM3/min

6 bar

600000 N/m2

45 Deg c

318 Deg K

287 J/Kg K

6.57419 Kg/m3

1.01325 bar

101325 N/m2

0 Deg c

273 Deg K287 J/Kg K

1.293219 Kg/m3

0.2 m3/sec

1.016717 NM3/sec

61.00303 NM3/min



128.11 NM3/min




Pressure = 0.983

= 98300

Temperature = 15.5

= 288.5

Gas constant R = 287

Density m/v = 1.18720524


Pressure = 1.01325

= 101325

Temperature = 0

= 273

Gas constant R = 287

Density m/v = 1.29321898


Air Consumption Per RAPH as per Alstom at STP = 0.07551159

Air Consumption Per RAPH as per Alstom at compressor discharge P & T = 0.01363632

Air Receiver capacity per RAPH for 10 minute storage = 8.18179211

0.0693214

4.15928429

Total service air requirement for RAPH air motor = 8.73



bar 1

N/m2

Deg c 2

Deg K

J/Kg K 3

Kg/m3 4

bar 1

N/m2

Deg c 2

Deg K

J/Kg K 3

Kg/m3 4

m3/sec 1

m3/sec 2

m3 3

NM3/sec

NM3/min

NM3/min




Pressure = 0.983 bar

= 98300 N/m2

Temperature = 15.5 Deg c

= 288.5 Deg K

Gas constant R = 287 J/Kg K

Density m/v = 1.187205237 Kg/m3


Pressure = 1.01325 bar

= 101325 N/m2

Temperature = 0 Deg c

= 273 Deg K

Gas constant R = 287 J/Kg K

Density m/v = 1.293218976 Kg/m3


Air Consumption Per RAPH as per TSPX at NTP = 0.125 NM3/sec

Air Consumption Per RAPH as per Alstom at compressor discharge = 0.024588942 m3/sec

Air Receiver capacity per RAPH for 10 minute storage = 14.75336538 m3

0.125 NM3/sec

7.5 NM3/min

Total service air requirement for RAPH air motor = 15.00 NM3/min



Ultimate Analysis of LDO

Carbon (%) 88.38

Hydrogen (%) 9.5

Oxygen (%) 0.0

Sulphur (%) 1.8

C (kg) O2 (kg) CO2 (kg)

12 32 44

1 2.67

O2 required (kg)

235.68

S.No Description Units

1 BMCR %

2 Heat duty Mbtu/hr

3 Efficiency %

4 GCV Kcal/kg

5 GCV Btu/lb

6 Fuel duty Mbtu/hr

7 Fuel flow Lb/hr

8 Fuel flow tph

9 Fuel flow kg/s

10 Fuel flow kg/hr

Service Air Consumption for LDO Atomisation

Total O2 required per 100 kg of fuel (kg)

313.48

Quantity of dry air needed per 100 kg of fuel (kg)

1362.96

C + O2 ----> CO2

88.38C + (2.67 x 88.38)O2 ------> 324.35 CO2



A MAIN BOILER

Sr. No. Description Unit

1 Boiler BMCR Load TPH

2 LDO Load Sharing Capability %

TPH

3 Amount of LDO Consumed TPH

4 Amount of service air required for At %TPH

5 NTP Atmospheric Pressure bar (abs)

6 NTP Atmospheric Temperature Deg C

7 Gas constant R J/Kg K

8 NTP density Kg/Nm3

9 Amount of service air required for At Nm3/min

B AUXILIARY BOILER

Sr. No. Description Unit

1 Boiler BMCR Load TPH2 LDO Load upto which atomising air re %

TPH

3 Amount of LDO Consumed TPH

4 Amount of service air required for At %

TPH

5 NTP Atmospheric Pressure bar (abs)

6 NTP Atmospheric Temperature Deg C

7 Gas constant R J/Kg K

8 NTP density Kg/Nm3

9 Amount of service air required for At Nm3/min



Molecular Weight

12

1

16

32

2H2 (kg) O2 (kg) H2O (kg)

4 32 36

1 8

O2 required (kg)

76.0

COAL LDO (Calculated) LDO (From Run)

100 30 30

5461.16 1638.35 1636.93

87.18 90.80 90.80

3300 10000 10000

5940 18000 18000

6264.31 1804.35 1802.87

1054600.0 100241.56 100160.0

478.36 45.47 45.43

132.88 12.63 12.62

478363.4 45469.3 45432.3

Theoretical air reqd.per kg of fuel (kg/kg of fuel)

13.63

Oxygen content in air (% by wt.)

23

10000

GCV of LDO (kcal/kg)

2H2 + O2 -----> 2H2O

9.5H2 + (9.5 x 8)O2 ----->85.5H2O



QTY QTY

2250 2250

30 10

675 225

45.45454545 15.73426573

20 459.090909091 7.08041958

1.01325 1.01325

0 0

287 287

1.293218976 1.293218976

117.1612498 91.25058879

QTY

60100

60

4.347826087

20

0.869565217

1.01325

0

287

1.293218976

11.20672824



S (kg) O2 (kg) SO2 (kg)

32 32 64

1 1

O2 required (kg)

1.8

172.01

Excess Air to Burners

36.30

Actual air flow required for 30% LDO firing (kg/s)

234.44

Density of air at NTP condition (kg/Nm3)

1.293

Air required for LDO atomisation (kg /kg of oil)

0.20

LDO Atomising air flow rate (kg/s)

2.52

LDO Atomising air flow rate (Nm3/min)

117.12

S + O2 -----> SO2

1.8S + (1.8 x 1)O2 ----> 3.6SO2

Theoretical air flow rate (kg/s)

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