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Ðàñ÷åò ïàðîïîòðåáëåíèÿ ñóäíà
1. 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 | |
| Sea water | ||
| Ballast water | ||
| Pump room | ||
| Engine room |
2) Temperature in tank
| F.O. tank | |
| HFO settling tank | |
| HFO service tank | |
| Cargo oil tank | |
| Slop tank |
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 |
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 |
| (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
| Oil fired boiler | Exhaust gas economizer | |
| Type | Vertical water tube | Forced circulation |
| No. of sets | ||
| 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 |
2) Main engine and Gen. engine
| Main engine | Gen. engine | |
| Type | B&W 5S70MC-C | 4-Stroke |
| No. of sets | ||
| MCR (ÂÍÐ x rpm) | 21,100x91.0 | 1,090x720 |
| NCR (ÂÍÐ x rpm) | 18,990x87.9 | - |
3) Heater
| Description | Set | Flow rate (m3/h) | In/out temperature (°C) |
| M/E F.O. heater | 6.9 | 100.0/150.0 | |
| G/E F.O. heater | 1.5 | 100.0/150.0 | |
| A/B F.O. heater | 4.3 | 55.0/145.0 | |
| H.F.O. purifier heater | . 3.6 | 60.0/98.0 | |
| L.O. purifier heater | 2.4 | 45.0/98.0 | |
| Tank cleaning water heater | 180.0 | 20.0/80.0 | |
| Calorifier | 1.0 | 10.0/70.0 |
4) Steam driven pump
| Description | Set | Capacity (m3/h x mTH) | Type | Steam consumption (kg/h) |
| Cargo oil pump | 3,000x125 | Vertical centrifugal with 1-stage steam turbine | 13,268 | |
| Cargo stripping pump | 200x125 | Reciprocating | 2,910 |
| Proj. No. : H.5230 | STEAM | CONSUMPTION | CALCULATION | |||||||||||||||||||
| Date: Feb.27, 2003 | WINTER | CONDITION | ||||||||||||||||||||
| DESCRIPTION | DESIGN | SEAGOING | TANK HEATING | MANEUVERING | UNLOADING | IN-PORT | TANK CLEANING | |||||||||||||||
| NO | EACH CAPACITY | P | AMOUNT | NO | % | STM | NO | % | STM | NO | % | STM | NO | % | STM | NO | % | STM | NO | % | STM | |
| M/E F.O. Heater | 6.9m3/h (100/150 °C) | |||||||||||||||||||||
| G/E F.O. Heater | 1.5m3/h (100/150 °C) | |||||||||||||||||||||
| HFO Purifier Heater | 3.6 m3/h ( 60/ 98 °C) | |||||||||||||||||||||
| A/B FO Heater | 4.3m3/h ( 55/145 °C) | |||||||||||||||||||||
| LO Purifier Heater | 2.4 m3/h ( 45/ 98 °C) | |||||||||||||||||||||
| Boiler warm-up | For Stand-By Boiler | |||||||||||||||||||||
| A/B Burner Atomizing | Steam Atomizing | |||||||||||||||||||||
| HFO Sett. Tank | 72.6 m3 60 °C Keeping | |||||||||||||||||||||
| HFO Serv. Tank | 72.6 m3 85 °C Keeping | |||||||||||||||||||||
| Others | Misc. equipment/tanks | |||||||||||||||||||||
| COP Turbine | 3000 m3/h x125m | 13,268 | 39,804 | 13,268 | ||||||||||||||||||
| CO Stripping Pump | 200m3/h x125m | 2,910 | ||||||||||||||||||||
| Air Ejector | For Vacuum Condenser | |||||||||||||||||||||
| Cargo Oil Tank | 127315 m3 (44/66°C/96H) | 28,088 | 28,088 | |||||||||||||||||||
| 127315 m3 66°C Keeping | 10,040 | ■o | 10,040 | |||||||||||||||||||
| Slop Tank | 1350.3 m3 ( 44/66 °C/24H) | 1,583 | 3,166 | |||||||||||||||||||
| 1350.3 m3 66 °C Keeping | ||||||||||||||||||||||
| T.C. Heater | 180m3/h (20/80 °C) | 18,160 | 18,160 | |||||||||||||||||||
| Ballast & FW Tanks | 1 | 0 °CKeeping | 4,568 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 100 | 4,568 | 1 | 100 | 4,568 | |||
| No.1 H.F.O. Tank(S) | 825.3 m3 (5/45°C/96H) | 370 | ||||||||||||||||||||
| 825.3 m3 45 °C Keeping | ||||||||||||||||||||||
| No.2H.F.O. Tank(S) | 996.9 m3 (5/45°C/96H) | |||||||||||||||||||||
| 996.9 m3 45 °C Keeping | ||||||||||||||||||||||
| No.1 H.F.O. Tank(P) | 733.3 m3 (5/45°C/96H) | |||||||||||||||||||||
| 733.3 m3 45 °C Keeping | ||||||||||||||||||||||
| No.2 H.F.O. Tank(P) | 909.0 m3 (5/45°C/96H) | 414 | ||||||||||||||||||||
| 909.0 m3 45 °C Keeping | ||||||||||||||||||||||
| Accomm. Heating | 100%Capa. (-30/20°C) | |||||||||||||||||||||
| Calorifier | 1.0m3/h ( 10/70°C) | |||||||||||||||||||||
| Sub Total | 1,696 | 33,283 | 12,084 | 41,859 | 5,939 | 38,627 | ||||||||||||||||
| Pipe loss & margin( 5% | 1,664 | 2,093 | 1,931 |
Date: 2015-12-11; view: 1707
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