# Rankine cycle efficiency of a steam power plant is between what percentage

Electrical Engineering XYZ MCQs

Rankine cycle efficiency of a steam power plant is between what percentage;

1. 60 – 80%
2. 20 – 30%
3. 30 – 45%
4. 45 – 80%

Correct answer: 3. 30 – 45%

Explanation: The Rankine cycle is a model used to describe how steam power plants operate. It involves heating water to produce steam, which then drives a turbine to generate electricity. The efficiency of this cycle depends on factors like temperature and pressure.

Real-world power plants don’t achieve perfect efficiency due to losses in various parts of the system, like heat loss in the boiler, friction in the turbine, and pressure losses in the condenser. As a result, the actual efficiency is lower than what the theoretical model suggests.

Typically, modern steam power plants achieve efficiencies between 30% and 45%. This range considers both theoretical limits and real-world constraints. Therefore, the Rankine cycle efficiency of a steam power plant usually falls within this percentage range.