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
38 Service air for LDO Air scavanging at 27.0 m EL NM3/min
39 Service air for LDO Air Automisation at 30.9 m EL NM3/min
40 Service air for LDO Air scavanging at 30.9 m EL NM3/min
41 Service air for LDO Air Automisation at 34.6 m EL NM3/min
42 Service air for LDO Air scavanging at 34.6 m EL NM3/min
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43 Service air for boiler elevation 38.8 m EL NM3/min
44 Service air for boiler elevation 42.4 m EL NM3/min
45 Service air for boiler elevation 45.4 m EL NM3/min
46 Service air for boiler elevation 48.8 m EL NM3/min
47 Service air for boiler elevation 54.0 m EL NM3/min
48 Service air for boiler elevation 58.0 m EL NM3/min
49 Service air for boiler elevation 60.6 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
52 Service air for boiler elevation 65.1 m EL NM3/min
53 Service air for boiler elevation 66.9 m EL NM3/min
54 Service air for boiler elevation 69.5 m EL NM3/min
55 Service air for boiler elevation 71.9 m EL NM3/min
56 Service air for boiler elevation 74.5 m EL NM3/min
57 Service air for boiler elevation 77.0 m EL NM3/min
58 Service air for boiler elevation 79.6 m EL NM3/min
59 Service air for boiler elevation 86.1 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
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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
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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
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Intermittant Continous Intermittant Continous Intermittant- - √ - -
- - √ - -
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√ - - - -
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√
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√ - - - -
√ - - - -
√ - - - -
√ - - - -
√ - - - -
√ - - - -
√ - - - -
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√ - - - -
√ - - - -
√ - - - -
√ - - - -
√ - - - -
√- - - -
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- - - - √
- - - - √
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nance Emergency Start Up
Service Air Requirement
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√ - - - -
√ - - - -
√ - - - -
√ - - - -
√ - - - -
√ - - - -
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95.88 15.00 216.16
38.352 6 216.16
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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 =
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 =
RAPH AIR MOTOR SERVICE AIR REQUIREMENT
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Total service air requirement for RAPH air motor =
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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
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128.11 NM3/min
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Density Calculation at rated pressure & temperature
Pressure = 0.983
= 98300
Temperature = 15.5
= 288.5
Gas constant R = 287
Density m/v = 1.18720524
Density Calculation at NTP condition
Pressure = 1.01325
= 101325
Temperature = 0
= 273
Gas constant R = 287
Density m/v = 1.29321898
Converion of Air Volumetric flow rate from rated Condition to NTP
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
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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
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Density Calculation at rated pressure & temperature
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
Density Calculation at NTP condition
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
Converion of Air Volumetric flow rate from rated Condition to NTP
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
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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
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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
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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
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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
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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)