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Rating point (CMCR = Rx)
Power: Speed: kW rpm
Cooling system specification
j j j Conventional sea-water cooling Central fresh water cooling with single-stage scavenge air cooler Central fresh water cooling with two-stage scavenge air cooler
Number of cylinders Engine power heat dissipation cooler in/out cooler in/out heat dissipation cooler in/out mass flow heat dissipation *1) cooler in/out cooler in/out heat dissipation in/out heat dissipation *2)
G1.2
Part-load data
The engine part-load data can be determined with the help of the winGTD-program on CD-ROM, which is enclosed in this manual.
G1.3
Engine system data
8 11640 2167 127 85.0/70.0 141 38.5/52.0 32.2 4001 175 32.0/52.1 89023 1044 144 59.8/45.0 141 32.0/38.5 16.8 7212 316 32.0/52.0 2982 89713 287 127 30 1.9 60 bar 6.1 7.5 3.0 6.5 5.0 2.2
Wärtsilä Switzerland Ltd
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25.61.07.40 – Issue IV.02 – Rev. 0
Engine Selection and Project Manual
G.
RTA48T B
Ancillary systems
G1.3.1
Questionnaire for engine data (winGTD, see chapter J)
Sizing engine ancillary systems, i.e. for fresh water, sea-water, lubricating oil, fuel oil, etc., depends on the contract maximum engine power. If the expected system design is outside the scope of this book please contact our representative or Wärtsilä Switzerland Ltd, Winterthur, directly.
The data contained in tables G1, G2 and G3 are applicable to the nominal maximum continuous rating (R1) of each five- to eight-cylinder engine at design (tropical) conditions. They are suitable for estimating the size of ancillary equipment. The winGTD-program enables to obtain all engine and system data at any Rx rating within the engine rating field and of part-load, as mentioned above. However, for convenience or final confirmation when optimizing the plant, Wärtsilä Switzerland Ltd provide a computerized calculation service. Please complete in full the questionnaire on the next page to enable us to supply the necessary data.
In order to obtain computerized engine performance data and optimized ancillary system data, please send completed copy of this questionnaire to: Wärtsilä Switzerland Ltd, PO Box 414, Dept. 4052, CH-8401 Winterthur, Switzerland. or fax: Fax No. +41 52 262 07 07
7 10185 1860 109 85.0/70.0 121 38.5/52.0 32.2 3549 175 32.0/49.8 77895 897 130 59.0/45.0 121 32.0/38.5 16.5 6306 296 32.0/50.7 2609 78499 287 115 30 1.7 55 bar 6.1 7.5 3.0 6.5 5.0 2.2 25 2.1 55
Calculations are based on an operating mode according to propeller law and design (tropical) conditions.
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Wärtsilä Switzerland Ltd
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RTA48T B
Engine Selection and Project Manual
G.
Ancillary systems
G1 G1.1
General information Introduction
6 8730 1563 92 85.0/70.0 102 38.5/52.0 32.2 3083 175 32.0/47.5 66767 755 116 58.2/45.0 102 32.0/38.5 16.1 5401 277 32.0/49.1 2236 67285 287 102 30 1.6 50 bar 6.1 7.5 3.0 6.5 5.0 2.2 25 1.9 50
Engine specification
Number of cylinders: PTO: (see PTO options table F1) Max. PTO [kW] Constant-speed output: Speed [rpm]: f f f 700 Yes 1000 f j f 1200 1200 f f 1800 1500 f f 1800 No (continue to ‘Rating point’ below) RTA48T-B f Yes j No (continue to ‘Rating point’ below)
RTA48T B
Engine Selection and Project Manual
G.
Ancillary systems
G1.3.2
Full power (R1) engine system data for conventional sea-water cooling system
Engine equipped with ABB VTR-Turbocharger*
at design pressure capacity each capacity each
bar m3 m3/h
m3/h 130 25 109 4.6 2.5 296
m3/h 144 29 127 5.2 2.9 316
Remark:
*1) *2) *3) *4)
Excluding heat and oil flow for balancer, damper (see section D5) and PTO gear (see Table F1). Available heat for boiler with a gas outlet temperature 170_C and temperature drop of 5_C from turbine to boiler. For 12 starts and refilling time 1 hour. Pressure difference across pump (final delivery head must be according to the actual piping layout).
– kW kW m3/h °C m3/h °C °C kW m3/h °C kg/h kW m3/h °C m3/h °C °C kW m3/h °C kW kg/h °C kW
5 7275 1336 79 85.0/70.0 87 38.5/52.0 32.2 2514 135 32.0/48.4 55639 645 102 57.9/45.0 87 32.0/38.5 16.0 4496 222 32.0/49.8 1864 56070 287 89 25 1.8 50 m3/h 102 18 79 3.3 1.8 222 30 1.6 50 bar 6.1 7.5 3.0 6.5 5.0 2.2 25 1.8 50 m3/h 116 22 92 3.9 2.2 277
*for ABB TPL, Mitsubishi or MAN program (see chapter J).
F10.1906
Fig. G1
Conventional sea-water cooling system
General data Speed 127 rpm Cylinder water cooler (HT) Fresh water flow (HT) Fresh water temperature Sea-water flow Sea-water temperature Mean log. temperature difference Scavenge air cooler (LT) Sea-water flow (LT) Sea-water temperature Scavenge air Lubricating oil cooler Oil flow *1) Oil temperature Sea-water flow Sea-water temperature Mean log. temperature difference Sea-water cooling Sea-water flow Sea-water temperature Exhaust gas Mass flow Temperature after turbine Engine radiation Starting air *3) Bottle (2 units) Air compressor (2 units) Pump capacities / delivery head *4) Lubricating oil Crosshead lubricating oil High temperature circuit Fuel oil booster Fuel oil feed Sea-water
Client specification
Company: Name: Address: Department: Country: Telephone: Telefax: e-mail: Date of contact:
Project specification
Project number: Shipowner, country: Shipyard, country: Project manager: Wärtsilä representative: