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Showing posts from January 4, 2010

BASIC STEAM CYCLE / BOILERS

INTRODUCTIONSteam is the working substance used for the propulsion of many surface ships, including nuclear and conventionally powered steam ships. Central to understanding the operation of steam propulsion is the basic steam cycle, a process in which we generate steam in a boiler, expand the steam through a turbine to extract work, condense the steam into water, and finally feed the water back to the boiler. This is accomplished by a series of heat transfers and work exchanges throughout system. We will introduce the basics of naval propulsion and auxiliary boilers, review the basic steam cycle, and examine the major components of this cycle in detail, focusing on required temperatures and pressures and where heat and work are added and removed.LESSON TOPIC LEARNING OBJECTIVESTerminal Objective:2.0 EXPLAIN the fundamentals and principles of thermodynamics and fluid mechanics in relation to the design, construction and operation of engineering plant equipment. (JTI:A)Enabling Objectiv…

Burner for ship's boiler Aalborg Industries KBO™ - 650 - 3500 kW

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The KBO™ pressure jet burner is a robust design to meet the requirements in the marine environment. It is a reliable,
fully automatic heavy fuel oil burner with only simple requirements to the installation.

The KBO™ burner is a monoblock design making installation cheap and quick due to pre-wiring, pre-piping and pre-testing before leaving the factory. The burner is provided with hinges for easy swing out for inspection and maintenance purposes. Electric connections are easily accessed under the top cover. The burner is designed to be operated with the computerized MISSION™ Control System from Aalborg Industries.

BOILERS

The function of a boiler in the steam cycle isto convert water into steam. Reliability inoperating naval boilers and associated equipmentis important for the power plant to operate atmaximum efficiency. The complex design of navalboilers requires a high degree of technicalknowledge and skill on the part of the fireroompersonnel responsible for boiler operations. Allengineers should have some knowledge of theprinciples of combustion, how combustion occursin a boiler, and the combustion requirements foroperating a boiler more efficiently. You may wantto review combustion in chapters 2 and 3 of thistextbook.This chapter describes boilers commonly usedin propulsion plants of naval steam-drivensurface ships. This information is general innature and does not relate to any one class of ship.Chapter 221 of the Naval Ships’ Technical Manualis the basic doctrine reference on boilers. Fordetailed information on …