Question
Download Solution PDFThe Rankine cycle is an ideal cycle for vapor power plants because:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Rankine cycle:
The Rankine cycle is an ideal cycle because that has two constant pressure and two isentropic processes and all processes are reversible.
There are four processes in the Rankine cycle:
Process 1 – 2: Isentropic compression
- The working fluid is pumped from low to high pressure.
Process 2 – 3: Isobaric heat addition
- The high-pressure liquid enters a boiler where it is heated at constant pressure by an external heat source to become a dry saturated vapor.
Process 3 – 4: Isentropic expansion
- The dry saturated vapour expands through a turbine, generating power.
Process 4 – 1: Isobaric heat rejection
- The wet vapour then enters a condenser where it is condensed at constant pressure and temperature to become a saturated liquid.
Additional Information
- The Rankine cycle efficiency varies from 35 to 45 %
- ηcarnot > ηrankine
- ( Wnet )rankine > ( Wnet )carnot
- Infinite or series of steam extraction will lead to an ideal regenerative cycle called carnotization of Rankine cycle.
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