This article discusses about Difference Between NCR and MCR, Why We Run Engine On NCR. Please read it below.
Difference Between NCR and MCR- Basics First
Normal Continuous Rating (NCR):
NCR is the maximum power output that a marine diesel engine can sustain continuously without any damage or deterioration. It represents the rated power output of the engine and is typically specified by the engine manufacturer. The NCR is expressed in kilowatts (kW) or horsepower (hp) and is usually indicated on the engine nameplate.
The NCR is based on the engine’s design and construction and is determined by various factors such as the engine’s cylinder bore, stroke, compression ratio, combustion chamber design, fuel injection system, turbocharging system, and cooling system. The NCR represents the power output of the engine under normal operating conditions, such as cruising or maneuvering.
Maximum Continuous Rating (MCR):
MCR is the maximum power output that a marine diesel engine can sustain continuously for a limited period of time without any damage or deterioration. It is typically higher than the NCR and represents the maximum power output that the engine can deliver under specific conditions, such as high-speed operation or emergency situations. The MCR is also specified by the engine manufacturer and is expressed in kilowatts (kW) or horsepower (hp).
The MCR is based on the engine’s NCR and is usually a certain percentage higher than the NCR. The percentage increase depends on various factors such as the engine’s size, speed, and application. The MCR represents the maximum power output that the engine can deliver for a limited period of time, such as during a sudden increase in demand or emergency situations. For example, during an emergency situation such as a storm, the engine may need to operate at its MCR to maintain the ship’s stability and safety.
In summary, NCR and MCR are important parameters in marine diesel engines, as they determine the engine’s power output, fuel consumption, and overall performance. The NCR represents the rated power output of the engine under normal operating conditions, while the MCR represents the maximum power output that the engine can sustain for a limited period of time without any damage or deterioration.
