Wärtsilä 38 product guide - 186 Pages

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Wärtsilä 38 product guide

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compatible technologies, Wärtsilä focuses on the marine and energy markets with products and solutions as well as services. Through innovative products and services, Wärtsilä sets out to be the most valued business partner of all its customers. This is achieved by the dedication of over 18,000 professionals manning 160 locations in 70 countries around the world. Wärtsilä is listed on the Nordic Exchange in Helsinki, Finland. WÄRTSILÄ® is a registered trademark. Copyright © 2008 Wärtsilä Corporation. 12.2008 / Bock´s Office / Multiprint complete lifecycle power solutions. When creating better and environmentally WÄRTSILÄ 38 – PROJECT GUIDE Wärtsilä enhances the business of its customers by providing them with WÄRTSILÄ 38 PROJECT GUIDE

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Wärtsilä 38 - Project guide Introduction Introduction This Project 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 2/2008 issue replaces all previous issues of the Wärtsilä 38 Project Guides. Issue Compact Silencer System added and other minor updates Wärtsilä Ship Power Technology, Product Support Trieste, November 2008 THIS PUBLICATION IS DESIGNED TO PROVIDE AS...

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Wärtsilä 38 - Project guide Table of Contents

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Wärtsilä 38 - Project guide Table of Contents 7.3 7.4 7.5

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Wärtsilä 38 - Project guide Table of Contents 17.4 17.5 17.6

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Wärtsilä 38 - Project guide 1. General data and outputs General data and outputs Technical main data The Wärtsilä 38 is a 4-stroke, turbocharged and intercooled diesel engine with direct injection of fuel. Cylinder bore Piston diplacement 2 inlet valves and 2 exhaust valves Cylinder configuration Mean effective pressure Mean piston speed Maximum continuous output Nominal speed is 600 rpm for propulsion engines. The mean effective pressure can be calculated as follows: where: pe = Mean effective pressure [MPa] P = Output per cylinder [kW] c = Operating cycle (2) D = Cylinder bore [mm] S =...

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Wärtsilä 38 - Project guide 1. General 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 with engine driven pumps, operating in ambient conditions according to ISO 15550:2002 (E). The ISO standard reference conditions are: total barometric pressure...

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Wärtsilä 38 - Project guide 1. General data and outputs Total length of the engine Height from the crankshaft centerline to the highest point Total width of the engine Minimum height when removing a piston Height from the crankshaft centerline to the engine feet Dimension from the crankshaft centerline to the bottom of the oil sump Length of the engine block Dimension from the end of the engine block to the end of the crankshaft Width of the engine block at the engine feet Distance from the center of the crankshaft to the outermost end of the engine Length from the engine block to the...

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Wärtsilä 38 - Project guide 1. General data and outputs Principal generating set dimensions The engine can also be delivered as complete generating set. An engine and generator mounted together on a common base frame, which can be flexible mounted. For indicative main dimensions see figure 1.3 and tables 1.5 and 1.6. Figure 1.3 Generating set (DAAE042636) Table 1.5 Generating sets dimensions Weigth [tons] Table 1.6 Common Baseframe dimensions Indicative dimensions and wet weights (final values depend on generator type and size) * T/C at flywheel end

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Wärtsilä 38 - Project 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 and speed range for clutch engagement are indicated in the diagrams, 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...

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Wärtsilä 38 - Project guide 2. Operating ranges 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 max. 85% of the engine output at nominal engine speed during trial with loaded ship. Typically this corresponds to...

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Figure 2.3 Maximum load increase rates for variable speed engines Loading of Wartsila 38 engines variable speed If minimum smoke during load increase is a major priority, slower loading rate than in the diagram can be necessary below 50% load. In normal operation the load should not be reduced from 100% to 0% in less than 15 seconds. When ab- solutely necessary, the load can be reduced as fast as the pitch setting system can react (overspeed due to windmilling must be considered for high speed ships).

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Wärtsilä 38 - Project guide 2. Operating ranges 2.2.2 Diesel electric propulsion Figure 2.4 Maximum load increase rates for engines operating at nominal speed In normal operation the load should not be reduced from 100% to 0% in less than 15 seconds. In an emergency situation the full load can be thrown off instantly. The maximum deviation from steady state speed is less than 10%, when applying load according to the emergency loading ramp. Load increase according to the normal ramp correspondingly results in less than 3% speed deviation. Maximum instant load steps The electrical system must...

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