Exam Question
(a) Sketch and describe a composite boiler and explain its working principle. (12)
(b) What do you understand by the term 'Heat Recovery'? Briefly explain as to how it contributes in increasing plant efficiency? (4)
Class 4 (4th Engineer)
MEKG
📅 Jul 2023
Reference Answer
### (a) Composite Boiler: Sketch, Description, and Working Principle (12 Marks)
A composite boiler is a type of marine boiler designed to generate steam using two independent heat sources within a single shell: the main engine's exhaust gas and a dedicated oil-fired burner. This dual-source capability provides operational flexibility, allowing for steam generation both at sea and in port.
#### Construction and Design
A typical vertical-type composite boiler consists of the following key components:
A composite boiler is a type of marine boiler designed to generate steam using two independent heat sources within a single shell: the main engine's exhaust gas and a dedicated oil-fired burner. This dual-source capability provides operational flexibility, allowing for steam generation both at sea and in port.
#### Construction and Design
A typical vertical-type composite boiler consists of the following key components:
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