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Wärtsilä 26 product guide - 168 Pages

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Catalogue excerpts

WÄRTSILÄ 26 PRODUCT GUIDE

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Wärtsilä 26 - Product Guide Introduction Introduction This Product Guide provides data and system proposals for the early design phase of marine engine installations. For contracted projects specific instructions for planning the installation are always delivered. Any data and information herein is subject to revision without notice. This 1/2013 issue replaces all previous issues of the Wärtsilä 26 Project Guides. Issue Updates throughout the product guide Attached drawings updated (Online version). Technical data added for IMO Tier 2 engines, Compact Silencer System added, Chapter Exhaust Emissions...

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Wärtsilä 26 - Product Guide Table of Contents

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Wärtsilä 26 - Product Guide Table of Contents

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Wärtsilä 26 - Product Guide This page intentionally left blank

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Wärtsilä 26 - Product Guide 1. Main Data and Outputs Maximum continuous output Table 1.1 Rating table for Wärtsilä 26 Cylinder configuration Main engines Generating sets The generator outputs are calculated for an efficiency of 96.5% and a power factor of 0.8. The maximum fuel rack position is mechanically limited to 110% of the continuous output for engines driving generators. The mean effective pressure pe can be calculated as follows: where: Pe = mean effective pressure [bar] P = output per cylinder [kW] n = engine speed [rpm] D = Cylinder diameter [mm] L = length of piston stroke [mm] c =...

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Wärtsilä 26 - Product Guide 1. Main Data and Outputs Reference conditions The output is available up to a charge air coolant temperature of max. 38°C and an air temperature of max. 45°C. For higher temperatures, the output has to be reduced according to the formula stated in ISO 30461:2002 (E). The specific fuel oil consumption is stated in the chapter Technical data. The stated specific fuel oil consumption applies to engines without engine driven pumps, operating in ambient conditions according to ISO 15550:2002 (E). The ISO standard reference conditions are: total barometric pressure relative...

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Wärtsilä 26 - Product Guide 1. Main Data and Outputs 1.4.1 Main engines Figure 1.1 In-line engines (DAAE034755b) * Turbocharger at flywheel end. All dimensions in mm. Weight in metric tons with liquids (wet sump) but without flywheel.

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Wärtsilä 26 - Product Guide 1. Main Data and Outputs * Turbocharger at flywheel end. All dimensions in mm. Weight in metric tons with liquids (wet sump) but without flywheel.

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Wärtsilä 26 - Product Guide 1. Main Data and Outputs 1.4.2 Generating sets Figure 1.3 Generating sets (DAAE034758b) * Turbocharger at flywheel end. ** TC inclination 30° All dimensions in mm. Weight in metric tons with liquids (wet sump) but without flywheel. NOTE! Generating set dimensions are for indication only, based on low voltage generators. Final generating set dimensions and weights depend on selection of generator and flexible coupling.

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Wärtsilä 26 - Product Guide 2. Operating Ranges Operating Ranges Engine operating range Below nominal speed the load must be limited according to the diagrams in this chapter in order to maintain engine operating parameters within acceptable limits. Operation in the shaded area is permitted only temporarily during transients. Minimum speed is indicated in the diagram, but project specific limitations may apply. 2.1.1 Controllable pitch propellers An automatic load control system is required to protect the engine from overload. The load control reduces the propeller pitch automatically, when a...

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Wärtsilä 26 - Product Guide 2. Operating Ranges reason or another, reduces the ship speed, which increases the power absorption of the propeller over the whole operating range. Loading conditions, weather conditions, ice conditions, fouling of hull, shallow water, and manoeuvring requirements must be carefully considered, when matching a fixed pitch propeller to the engine. The nominal propeller curve shown in the diagram must not be exceeded in service, except temporarily during acceleration and manoeuvring. A fixed pitch propeller for a free sailing ship is therefore dimensioned so that it absorbs...

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Wärtsilä 26 - Product Guide 2. Operating Ranges Figure 2.3 Operating field for Dredgers Loading capacity Controlled load increase is essential for highly supercharged diesel engines, because the turbocharger needs time to accelerate before it can deliver the required amount of air. A slower loading ramp than the maximum capability of the engine permits a more even temperature distribution in engine components during transients. The engine can be loaded immediately after start, provided that the engine is pre-heated to a HT-water temperature of 60…70ºC, and the lubricating oil temperature is min....

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Wärtsilä 26 - Product Guide 2. Operating Ranges engines have usually reached normal operating temperature before the tug starts assisting. The “emergency” curve is close to the maximum capability of the engine. If minimum smoke during load increase is a major priority, slower loading rate than in the diagram can be necessary below 50% load. Large load reductions from high load should also be performed gradually. In normal operation the load should not be reduced from 100% to 0% in less than 15 seconds. When absolutely necessary, the load can be reduced as fast as the pitch setting system can react...

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Wärtsilä 26 - Product Guide 2. Operating Ranges Start-up time A diesel generator typically reaches nominal speed in about 20...25 seconds after the start signal. The acceleration is limited by the speed control to minimise smoke during start-up. Operation at low load and idling The engine can be started, stopped and operated on heavy fuel under all operating conditions. Continuous operation on heavy fuel is preferred rather than changing over to diesel fuel at low load operation and manoeuvring. The following recommendations apply: Absolute idling (declutched main engine, disconnected generator)...

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Wärtsilä 26 - Product Guide 3. Technical Data Technical Data Wärtsilä 6L26 Table 3.1 Wärtsilä 6L26 Cylinder output Engine speed Engine output Mean effective pressure Combustion air system (Note 1) Flow of air at 100% load Temperature at turbocharger intake, max. Air temperature after air cooler, nom. (TE601) Temp. after turbo, 100% load (TE517) Temp. after turbo, 85% load (TE517) Temp. after turbo, 75% load (TE517) Temp. after turbo, 50% load (TE517) Exhaust gas pipe diameter, min Calculated exhaust diameter for 35 m/s Jacket water Pressure before injection pumps (PT101) Engine driven pump capacity...

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