Steam Plant Basics — Definition of a Steam Boiler A closed vessel constructed of steel and used for the generation of steam by applying heat to water is known as a:

Introduction:
Clear terminology prevents design and operation errors in steam plants. The component that converts the chemical energy of fuel into thermal energy of steam by heating water in a pressurized, steel enclosure is the boiler.

Given Data / Assumptions:

• Enclosed, pressure-retaining steel vessel.
• Receives water and produces steam.
• External heat source via combustion or waste heat.

Concept / Approach:
A steam boiler is distinct from the turbine (which converts steam energy to mechanical work), the condenser (which condenses exhaust steam back to water), and injectors (which use steam jet to feed water). The definition focuses on the pressure vessel function and steam generation process.

Step-by-Step Solution:
Identify function: generate steam within a closed, pressurized vessel.Map to plant components: boiler matches this; turbine, condenser, injector have different roles.Therefore, choose “steam boiler”.

Verification / Alternative check:
Standards and codes (e.g., boiler regulations) define boilers as pressure vessels for steam generation, confirming the terminology.

Why Other Options Are Wrong:

• Steam turbine: energy conversion from steam to shaft power, not generation.
• Condenser: recovers condensate by heat rejection.
• Injector: feeds water using a steam jet, not a vessel for steam production.

Common Pitfalls:
Using “boiler” generically for the entire steam plant rather than the specific pressure vessel and heating surfaces.

Final Answer:
steam boiler