| Ðàñ÷åò ïàðîïîòðåáëåíèÿ ñóäíà1. General
Steam consumption is calculated under the following operational conditions
1) Sea going
2) Cargo oil tank heating
3) Maneuvering
4) Cargo unloading
5) In-port
6) Cargo oil tank cleaning
2. Design criteria
1) Environmental data
| Environmental condition
| Winter (°C)
| I.S.O. ((°C)
| | Atmosphere
| -10
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| | Sea water
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| | Ballast water
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| | Pump room
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| | Engine room
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2) Temperature in tank
| F.O. tank
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| | HFO settling tank
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| | HFO service tank
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| | Cargo oil tank
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| | Slop tank
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3) Heating-up temperature and time
| Tank
| Winter
| Heating-up time
| | F.O. tank Cargo oil tank Slop tank
| From5°C to 45°C From 44 °C to 66°C From 44 °C to 66°C
| 96 Hours 96 Hours 24 Hours
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4) Available enthalpy
| Heating method
Application
| 7 kg/cm2g (kcal/kg)
| 9 kg/cm2g (kcal/kg)
| | Heater Tank
| 490 540
| *573 **543
| * For the tank cleaning heater
** For the cargo and slop tank heating
5) Specific gravity and specific heat
| Fluid
| Specific gravity
| Specific heat
| |
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| (kcal/kg °C)
| | Sea water
| 1.025
| 0.94
| | Fresh water
| 1.000
| 1.00
| | H.F.O.
| 0.980
| 0.45
| | L.O.
| 0.900
| 0.45
| | Cargo oil
| 0.850
| 0.45
| For the calculation of cargo oil tank heating
3. Main components
1) Steam generating plant
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| Oil fired boiler
| Exhaust gas economizer
| | Type
| Vertical water tube
| Forced circulation
| | No. of sets
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| | Evaporation x Pressure (kg/h x kg/cm2g)
| 25,000x16/7
| 1,500x7
| | Design Condition
| -
| NCR load of M/E and I.S.O. reference conditions
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2) Main engine and Gen. engine
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| Main engine
| Gen. engine
| | Type
| B&W 5S70MC-C
| 4-Stroke
| | No. of sets
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| | MCR (ÂÍÐ x rpm)
| 21,100x91.0
| 1,090x720
| | NCR (ÂÍÐ x rpm)
| 18,990x87.9
| -
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3) Heater
| Description
| Set
| Flow rate (m3/h)
| In/out temperature (°C)
| | M/E F.O. heater
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| 6.9
| 100.0/150.0
| | G/E F.O. heater
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| 1.5
| 100.0/150.0
| | A/B F.O. heater
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| 4.3
| 55.0/145.0
| | H.F.O. purifier heater
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| . 3.6
| 60.0/98.0
| | L.O. purifier heater
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| 2.4
| 45.0/98.0
| | Tank cleaning water heater
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| 180.0
| 20.0/80.0
| | Calorifier
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| 1.0
| 10.0/70.0
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4) Steam driven pump
| Description
| Set
| Capacity (m3/h x mTH)
| Type
| Steam consumption (kg/h)
| | Cargo oil pump
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| 3,000x125
| Vertical centrifugal with 1-stage steam turbine
| 13,268
| | Cargo stripping pump
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| 200x125
| Reciprocating
| 2,910
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| Proj. No. : H.5230
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| STEAM
| CONSUMPTION
| CALCULATION
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| | Date: Feb.27, 2003
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| WINTER
| CONDITION
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| | DESCRIPTION
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| DESIGN
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| SEAGOING
| TANK HEATING
| MANEUVERING
| UNLOADING
| IN-PORT
| TANK CLEANING
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| NO
| EACH CAPACITY
| P
| AMOUNT
| NO
| %
| STM
| NO
| %
| STM
| NO
| %
| STM
| NO
| %
| STM
| NO
| %
| STM
| NO
| %
| STM
| | M/E F.O. Heater
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| 6.9m3/h (100/150 °C)
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| | G/E F.O. Heater
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| 1.5m3/h (100/150 °C)
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| | HFO Purifier Heater
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| 3.6 m3/h ( 60/ 98 °C)
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| | A/B FO Heater
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| 4.3m3/h ( 55/145 °C)
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| | LO Purifier Heater
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| 2.4 m3/h ( 45/ 98 °C)
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| | Boiler warm-up
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| For Stand-By Boiler
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| | A/B Burner Atomizing
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| Steam Atomizing
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| | HFO Sett. Tank
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| 72.6 m3 60 °C Keeping
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| | HFO Serv. Tank
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| 72.6 m3 85 °C Keeping
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| | Others
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| Misc. equipment/tanks
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| | COP Turbine
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| 3000 m3/h x125m
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| 13,268
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| 39,804
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| 13,268
| | CO Stripping Pump
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| 200m3/h x125m
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| 2,910
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| | Air Ejector
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| For Vacuum Condenser
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| | Cargo Oil Tank
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| 127315 m3 (44/66°C/96H)
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| 28,088
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| 28,088
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| 127315 m3 66°C Keeping
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| 10,040
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| ■o
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| 10,040
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| | Slop Tank
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| 1350.3 m3 ( 44/66 °C/24H)
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| 1,583
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| 3,166
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| 1350.3 m3 66 °C Keeping
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| | T.C. Heater
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| 180m3/h (20/80 °C)
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| 18,160
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| 18,160
| | Ballast & FW Tanks
| 1
| 0 °CKeeping
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| 4,568
| 0
| 0
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| 0
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| 0
| 0
| 0
| 0
| 0
| 0
| 0
| 1
| 100
| 4,568
| 1
| 100
| 4,568
| | No.1 H.F.O. Tank(S)
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| 825.3 m3 (5/45°C/96H)
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| 370
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| 825.3 m3 45 °C Keeping
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| | No.2H.F.O. Tank(S)
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| 996.9 m3 (5/45°C/96H)
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| 996.9 m3 45 °C Keeping
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| | No.1 H.F.O. Tank(P)
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| 733.3 m3 (5/45°C/96H)
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| 733.3 m3 45 °C Keeping
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| | No.2 H.F.O. Tank(P)
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| 909.0 m3 (5/45°C/96H)
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| 414
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| 909.0 m3 45 °C Keeping
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| | Accomm. Heating
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| 100%Capa. (-30/20°C)
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| | Calorifier
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| 1.0m3/h ( 10/70°C)
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| | Sub Total
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| 1,696
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| 33,283
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| 12,084
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| 41,859
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| 5,939
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| 38,627
| | Pipe loss & margin( 5%
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| 1,664
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| 2,093
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| 1,931
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Date: 2015-12-11; view: 1387
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