Exam Question
(a) Describe with the aid of a sketch, the main engine ancillary equipment for automatic monitoring and regulation of fuel viscosity
(b) Explain the operation of equipment described in (a)
(c) Discuss the single fuel concept.
Class 2 (2nd Engineer)
MEKG
📅 Apr 2023
Reference Answer
### (a) Main Engine Ancillary Equipment for Automatic Fuel Viscosity Control
The primary system for automatic monitoring and regulation of fuel viscosity for a main engine is the Viscosity Controller, commonly known as a 'Viscotherm'. This system is a critical component of the fuel oil conditioning module, ensuring that heavy fuel oil (HFO) is delivered to the fuel injectors at the optimal viscosity for efficient combustion.
The main components are arranged in a closed-loop feedback system:
* **Fuel Oil Heater:** Typically a shell and tube heat exchanger using steam or thermal oil as the heating medium. Its purpose is to raise the fuel temperature to reduce its viscosity.
The primary system for automatic monitoring and regulation of fuel viscosity for a main engine is the Viscosity Controller, commonly known as a 'Viscotherm'. This system is a critical component of the fuel oil conditioning module, ensuring that heavy fuel oil (HFO) is delivered to the fuel injectors at the optimal viscosity for efficient combustion.
The main components are arranged in a closed-loop feedback system:
* **Fuel Oil Heater:** Typically a shell and tube heat exchanger using steam or thermal oil as the heating medium. Its purpose is to raise the fuel temperature to reduce its viscosity.
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