The efficiency of Rankine cycle can be increased by (a)...

The efficiency of Rankine cycle can be increased by
(a) decreasing initial steam pressure and temperature
(b) increasing exhaust pressure
(c) increasing expansion ratio
(d) increasing regenerative heaters

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Key Concepts

Condenser Pressure

Condenser pressure, or exhaust pressure, is the low-pressure condition in which the steam is condensed back into water. Lower condenser pressures lead to a larger pressure difference in the turbine, translating to higher work output and improved cycle efficiency, while higher pressures can detrimentally affect performance.

Regenerative Feedwater Heating

Regenerative feedwater heating is a technique used to preheat the water entering the boiler by extracting some of the steam energy. This process reduces the fuel required to raise the water temperature, minimizes thermal losses, and improves the thermal efficiency of the Rankine cycle.

Expansion Ratio

Expansion ratio refers to the degree of expansion of the steam within the turbine, which is determined by the ratio of the initial boiler pressure to the condenser pressure. An increased expansion ratio typically allows for more work to be extracted from the turbine, thereby enhancing the cycle's overall efficiency.

Rankine Cycle

The Rankine cycle is a thermodynamic cycle used to convert heat into work, primarily employed in steam power plants. Its efficiency and performance depend on the conditions at which the cycle operates, including boiler pressure, turbine expansion, and condenser pressure.

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