BD-CAL-FPSO(HULL)-014-002+M40218-014-002JS-轮机主要设备计算书

8/13/2019 BD-CAL-FPSO(HULL)-014-002+M40218-014-002JS-

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BASIC DESIGN OF

EP24-2 OFFSHORE OIL FIELD DEVELOPMENT

JOB NO. 2012BD-004

COSIGN

SIGNATURE

MAJOR MACHINERY EQUIPMENT CALCULATION

Page1 of 17

(O) 2012.8 ISSUED FOR REVIEW

B 2012.6 ISSUED FOR COMMENTS

REV. DATE DESCRIPTION BY CH K. REV W. EXAM. APPR.

CLIENT

CNOOC Ltd.Shenzhen

MAJOR MACHINERY

EQUIPMENT CALCULATION(CN-USP-SCS(E)-EP24-2)

Marine Design &

Research Institute

of China

DESIGN CERTIF. NO .

CNOOCResearch Institute

A111008717MARIC

091034-sj

DOCUMENT NO. REV.

BD-CAL-FPSO(HULL)-014-002

MARIC Doc. No.: M40218-014-002JS(O)

CNOOC RI APPROVED

SIGNATORY SIGNATURE DATE

REVW

EXAM.

APPR.


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BASIC DESIGN OF BD-CAL-FPSO(HULL)-014-002EP24-2 OFFSHORE OIL FIELD DEVELOPMENT REV. (O)

Major Machinery Equipment Calculation

MARIC Doc. No.: M40218-014-002JS Page 2 of 17

INDEX

1.0 Bi lge system ........................................................................................................3

2.0 Fire fighting system ............................................................................................5

3.0 The ballast system ..............................................................................................7

4.0 Compressed air system .....................................................................................9

5.0 Inert gas system................................................................................................ 11

6.0 Fuel oi l system .................................................................................................. 12

7.0 The seawater system ........................................................................................ 16


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1.0 Bilge system

1.1 The min. Internal diameter of branch bilge line for machinery room :According to BV rules of offshore units:

db1=2.16 )(1 CBL + +25 mm

db1 The min. Internal diameter of branch bilge line mm;

L1 The length of the machinery room m ;

B The width of the ship m;

C The depth of the ship m;

db1=2.16 )7.269.48(20 + +25 = 108.99 mm

Selected diameter of branch bilge line: 140 x 9.5 mm.

1.2 The min. Internal diameter of main bilge line for machinery room :

According to BV rules of offshore units:The cross-section area of the main bilge line is not to be less than twice thecross-section area of the machinery space.

dm = 2 db1= 2 x 108.99 = 154.2 mm

dmmin. Internal diameter of main bilge line mm

Selected diameter of main bilge line: 219 x 12.7 mm.

1.3 The capacity of bilge pump for machinery room:According to BV rules of offshore units:

The capacity of each pump or group pumps is not to be less than that required by thefollowing formula:

200565.0 mm dQ = = 134.4 m3/h

QmThe capacity of bilge pump for machinery room m3/h;

Selected bilge ballast & G. S. Pump in machinery room 2 sets

Capacity: 150 m3/h

Pressure: 0.4 MPa

Type: Vertical, Centrifugal, with self-priming device

1.4 Bilge daily pump( in machinery room ): 1 set

Capacity: 5 m3/h

Pressure: 0.4 MPa

Type: Piston pump

1.5 The min. internal diameter of branch bilge line for void tank of STP area:

According to BV rules of offshore units:

db3 = 2.16 )(3 CBL + +25


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= 2.16 )7.269.48(6.17 + +25=103.79 mm

Selected diameter of branch bilge line: 140 X 9.5 mm

1.6 The min. internal diameter of main bilge line for STP area void tank:


dv= 2 db3=146.78 mm

Selected diameter of main bilge line: 168 X 11 mm

1.7 The capacity of bilge ejector for void space around STP


Qv=0.00565 x db32 = 121.73 m3/h

Selected bilge ejector of void tank: 1 set

Capacity: ~130m3/h

1.8 The min. internal diameter of bilge line for void space between machinery room andcargo oil tank:


ds=2.16 )(2 CBL + +25 mm

ds The min. Internal diameter of branch bilge line mm;

L2 The length of the void space m ;

B The width of the ship m;C The depth of the ship m;

ds=2.16 )7.269.48(4.2 + +25 = 54.1 mm

Selected diameter of bilge line: 76 X 9.5 mm

1.9 The capacity of bilge ejector for chain locker:


Qv=0.00565 X ds2

= 16.54 m3/h

Selected bilge ejector of void tank between machinery room and cargo oil tank: 1 set

Capacity: 20 m3/h

Total head: ~35 mlc

1.10 Selected bilge ejector of chain locker: 1 set

Capacity: 20 m3/h

Total head: ~35 mlc


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2.0 Fire fight ing system

2.1 The capacity calculation of fire pump:

2.1.1 According to BV rules of offshore units: The capacity is not less then 2/3 of the totalcapacity of the bilge pumps.

Qf=3

2 Qm=

3

2 x (134.4 x 2) = 179.2 m3/h

2.1.2 According to BV rules of offshore unitsthe water supply volume for the Max.

requirement of deck foam fire fighting system (Q) to be about 368 m3/h.

2.1.3 The largest protective water spray for process plant (Q) to be about 740 m3/h.

So, Qh= Q+Q

=368+740

=1108m3/h

2.1.4 The water supply volume of the largest water spray unit for process plant:

According to CNOOC requirements: Qp=1200 m3/h

2.1.5 The max. quantity of water for fire-fighting

Q = 1200 m3/h

2.2 Selected electric fire pump( in machinery room ): 2sets

Capacity: 680 m3/h

Pressure: 1.3 MPa

Type: Vertical, single stage, centrifugal pump

2.3 Selected diesel engine driven fire pump (on main deck ): 1set

Capacity: 1200 m3/h

Pressure: 1.3 MPa

Type: Diesel engine driven, deep well type centrifugal pump

2.4 Selected jockey pump (in machinery room ): 1 set

Capacity: 36 m3/h

Pressure: 1.3 MPa

Type: Horizontal, centrifugal, self-priming


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3.0 Ballast system

3.1 Segregated ballast system:

3.1.1 The ballast time calculation:

The capacity of segregated ballast tanks & F.P.T shall be about 58289.4m3, and twosegregated ballast pumps starts simultaneously.

Discharging time of ballast tanks T1:

T1=QZ

G h

T1 discharging time; h

G capacity of special ballast tanks & F.P.T; ~58289.4 m3

Z quantity of ballast pump; 2 sets

Q capacity of each ballast pump; 1700 m3/h

tolerance coefficient; 0.85

3.1.2 Selected special ballast pumps (in pump room): 2 sets

Capacity: 1700 m3/h

Total head: 35 mlc

Type: Hydraulically driven submerged centrifugal

3.1.3 Selected water ballast eductor: 2 set

Capacity: ~ 200 m3/h

Total Head: ~ 35 mlc

3.2 A.P.T. ballast system:

3.2.1 Discharging time of A.P.T T2:

T2=QZ

G h

T2 discharging time; h

G volume of A.P.T; ~7706.4 m3

Z quantity of bilge ballast & G.S. pump; 2 sets

Q capacity of each bilge ballast & G.S. pump; 150 m3

/h tolerance coefficient; 0.85

hxx

T 20~85.017002

4.582891 ==


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T2=85.01502

4.7706

= 30 h

3.2.2 Selected bilge ballast & G.S. pump(in machine room): 2 sets

Capacity: 150/90 m3/h

Pressure: 0.4/0.8 MPa

Type: Vertical, centrifugal, with self-priming device


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4.0 Compressed air system

4.1 Consumption of instrument air Vs:

Instrument air consumption for process plant V1:

V1= 300 m3/h (Provided by CNOOC)

Instrument air consumption for marine equipment V2:

For pneumatic valve of heating system: ~ 10 m3/h

For IGG ~22 m3/h

For other system: ~50 m3/h

V2= 10++22+50 = 82 m3/h

Therefore: Vs = (V1+ V2) /= (300 + 82)/ 0.87 = 440 m3/h

VsTotal instrument air consumption; m3/h

V1Instrument air consumption for process plant; m3/h

V2Instrument air consumption for marine equipment; m3/h

Efficiency of air consumption for dryer.

4.2 Consumption of utility air Vu:

Consumption of utility air for process plant V3: ~ 160 m3/h

Consumption of utility air for marine equipment V4: ~ 100 m3/h

Vu = V3 + V4 = 160 + 100 = 260 m3/h

4.3 Total capacity of air consumption Va:

Va= Vs+Vu= 440 +260 = 700 m3/h

4.4 Capacity of air compressor Vo:

Vo = Vax m = 700 x 1.245 = 871.5 m3/h

Vocapacity of air compressor ; m3/h

Vatotal capacity of air consumption; m3/h

m coefficient of correction for environmental condition , 1.245

4.5 Selected instrument & service air compressor: 2 sets

Capacity: 880 m3/h

Discharge pressure: 1.2 MPa

Type: air cooled, screw type

4.6 Selected instrument air dryer: 1sets


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Capacity: 600 m3/h

Working pressure: 1.2 MPa

Type: Heatless desiccant Twin-Tower

Dew point: -23

Particle diameter:


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5.0 Inert gas system

The volume calculation for inert gas consumption hull part:

According to SOLAS and relative classification rules, the inert gas system shall be

capable of delivering inert gas to the cargo tanks at a rate of at least 125% of the

maximum rate of discharge capacity of the ship expressed as a volume.

In cargo oil offloading mode, the maximum rate should be consisted of six(6) sets

cargo oil pumps , One(1) slop pump, one(1) process water pump and one(1) C.O.

settling tank transfer pump at the same time.

According to discharge capacity of the pumps mentioned above:

Q1 = 1.25(Qc x6 + Qs x1 +Qp x1 +Qt x1)

= 1.25690040030015

= 7643.75 m3/h

Q1 supplied inert gas quantity for COT at offloading condition; m3/h ,

Qc capacity of each cargo oil pumps at offloading condition; 900m3/h

Qs capacity of slop pump at offloading condition; ~400 m3/h

Qp capacity of process water pump at offloading condition; ~300m3/h

Qt capacity of C.O. settling tank transfer pump; ~15m3/h

Note:the total consumption of inert gas system should include the amount consumed bytopside; and should be provided by CNOOC.


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6.0 Fuel oil system

Basic formula of oil consumption for equipment:

Q = Z x g x N x T x 10 6

( t )

or Q = Z x q x T x 10 6 ( t )

Q the quantity of consumption for this equipment ( t )

Z quantity of equipment

g specific fuel oil consumption rate ( g / kW h )

q fuel oil consumption rate ( g / h )

N rated output of equipment ( kW )

T service time ( h ) (self-sustained running time: 504h )

6.1 Calculation of fuel oil consumption :

The quantity of storage oil shall be according to calculation for twenty-one (21) days.

6.1.1 Fuel oil consumption for generator sets:

Q1= q1x T1 ( t )

q1 oil consumption under cargo oil offloading; 6x 1820 l/h

(according to submitted by CNOOC)

According to requirement of CNOOC, the MDO used for engine starting and beforestopping. (to be confirmed by CNOOC)

T1the time of using MDO ~40 h

Q1= 6 x 1820 x 40 x 10 3 = 436.8 ( m3)

6.1.2 Fuel oil consumption for emergency generator set:

Q2= Z x q x T x 10 3 ( t )

Z quantity of equipment; 1set

g fuel oil consumption rate; ~340kg / h

T service time; 24 ( h )

Q2= 1 x 340 x 24 x 10-3/0.84 = 9.72 (m3)

6.1.3 Fuel oil consumption for diesel engine of emergency fire pump:

Q3= Z x q x T x 10 6 ( t )

Z quantity of equipment; 1set

q fuel oil consumption rate; (165) l/ h

N rated output of equipment; 360 kW


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T service time; 18 ( h )

Q3= 1 x 165x 18 x 10 3= 2.97 m3

6.1.4 Fuel oil consumption for thermal oil boiler:

Q4= q x T x n ( t )

q1 consumption of thermal oil boiler under normal loading; 1500 l/h

n number of running boiler, 3 for re-starup after typhoon retreat

According to requirement of CNOOC, the MDO only used for boiler starting andbefore stopping.

T service time; ~40 h

Q4= 1.5 x 40 x 3 = 180 m3

6.1.5 Fuel oil consumption for I.G.G. units:

Q5= q1x G x T / ( t )

q1 fuel oil consumption for producing one I.G. ;

q1 0.074 kg/m3

G requirement quantity of I.G. ; (8000 m3/h)

T1 The time of offloading; ~72 h

Q4= 0.074 x 8000 x 72 / 840 = 50.7 m3

6.1.6 Total fuel oil consumption:

Q = Q1+ Q2+ Q3+ Q4

= 436.8 + 9.72+ 2.97 + 180 + 50.7

= 680.2 m3

There are three D.O.T. on board, total volume is ~1398 m3, one cleaning D.O.T. is170.7 m3, and one D. O. overflow tank is 99 m3. Totally more than 1500m3. So it isenough.

6.2 The calculation of diesel oil tank volume:

Basic formula of diesel oil service tank:

kxTxg

V

= m3

g fuel oil consumption for per hour; kg/h

T time of continuous service; h

fuel oil specific gravity; 840 kg/ m3

k

coefficient. 1.1


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6.2.1 The volume of fuel oil service tank for emergency generator set:

q =340 kg/h

T = 24 h

V2= 340 (kg /h ) x 24(h) x 1.1 / 840(kg/ m3) = 10.7 m3

Selected volume of fuel oil service tank for emergency generator set: ~17 m3 1set

6.2.2 The volume of fuel oil service tank for emergency fire pump:

q = 165 l/h

T = 18 h

V3= 165 (l/h ) x 18(h ) x 1.1 /1000 = 3.3 m3

According to NFPA20: V3=Nx 5.07 l/kWx (1+5%+5%)

=649x 5.07 l/kWx (1+5%+5%)

=3.62 m3

Selected volume of fuel oil service tank for emergency fire pump: ~5.2 m3 1 set

6.2.3 Selected cleaning D.O.T : 1 set

Capacity: 170.7 m3

6.3 Diesel oil pump & D.O. separator:

6.3.1 The capacity of diesel fuel transfer pump:

Q = V1-2/T = 35 / 2.5

= 14 m3/ h

T Filling time (to finish filling by two pumps within 2.5 hours); h

V1-2 The selected volume of MDO service tank for generator sets; m3 (to be

provided by CNOOC)

6.3.2 The capacity of transfer pump for emergency service tanks 2 sets

Q = ( V2+ V3)/T = (17 + 5.2 )/2 = 11.1 m3/h

T Filling time; h

V2 The selected volume of fuel oil service tank for emergency generator set.

V3 The selected volume of fuel oil service tank for emergency fire pump.

6.3.3 Selected diesel oil transfer pump: 2 sets

Capacity: 20 m3/h

Pressure: 0.65 MPa

Type: Horizontal gear pump


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6.3.4 Diesel oil separator:

Total volume of fuel oil consumption:Q = q1+q4

q1 Volume of fuel oil consumption for generator sets; m3/h

q1= 1820 x 2 (l/h) x 10-3= 3.64 m3/h

q4 Volume of fuel oil consumption for thermal oil boiler; m3/h

q4= 1500 (l/h) x 1 x 10-3= 1.5 m3/h

Q = 3.64+ 1.5= 5.14 m3/h = 5140 l /h

Required capacity: Q = Q x a x 24 / t

a coefficient; a = 1.18

t effective service time; for partial discharge t = 24 h

Q = 5140 (l/h) x 1.18 x 24 / 24 = 6065 l/h

Selected diesel oil separator: 1 set

Effective capacity: 7100 l/h

Type: Self-cleaning, partial discharge


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7.0 The seawater system

7.1 Capacity of center seawater system:

Cooling seawater capacity for process unit Q1: ~840m3/h

Cooling seawater capacity for HVAC of topside unit Q1: ~100 m3/h

Cooling seawater capacity for main generators Q2: ~1980 m3/h

Cooling seawater capacity for main inert gas generator unit Q3: ~6 00 m3 / h

Cooling seawater capacity for SPT HPU Q5: ~18 m3 /h

Cooling seawater capacity for air conditioning compressor Q6: ~150 m3/h x2

Cooling seawater capacity for air condition (control space) Q7: ~65 m3 /h

Cooling seawater capacity for refrigerating compressors Q8: ~8 m3 /h

Cooling seawater capacityfor air conditioner of No.1 machinery workshopQ9: ~4.4 m3/h

Cooling seawater capacityfor air conditioner of No.2 machinery workshopQ10: ~4.4 m3/h

Seawater capacity for fresh water generator Q11: ~16 m3 / h

Seawater capacity for anti-fouling system Q12: ~20 m3/h

Cooling SW capacity for fore deck machinery hydr. Oil cooler Q13: ~5 m3 /h

Cooling SW capacity for aft. deck machinery hydr. Oil cooler Q14: ~ 1 3 m3 / h

Cooling SW capacity for stern off-loadind systems HPU cooler Q15: ~ 13 m3/h

Cooling SW capacity for cargo oil pump HPU cooler Q16: ~185m

3

/h x2

The max. Supply capacity:

Qmax.= Q1+ Q1+ Q2+ Q3+ Q5+ Q6+ Q7+ Q8+ Q9+ Q10+ Q11+ Q12+ Q13+Q14+Q15+Q15+Q16

= 4356.8 m3/h

In emergency case, the seawater capacity as follows:

QE.= Q6+ Q7+ Q8+ Q12= 393 m3/h

7.2 Main sea water pump: 6 sets (one for stand-by)

Capacity: ~950 m3/h

Pressure: 0.8 MPa

Type: vertical, single stage, centrifugal

7.3 Aux. Sea water pump 1 sets

Capacity: 420 m3/h

Pressure: 0.6 MPaType: vertical, single stage, centrifugal


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7.4 Deck water seal pump for I.G.G 2 sets

Capacity: ~6 m3/h

Pressure: 50mlc

Type: horizontal, single stage, centrifugal

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BD-CAL-FPSO(HULL)-014-002+M40218-014-002JS-轮机主要设备计算书