AN INTRODUCTION TO DIFFERENT STEAM CYCLES: AN INTRODUCTION TO DIFFERENT STEAM CYCLES By: Amit Kumar Singh CONTENTS: CONTENTS BASIC TERMINOLOGIES RANKINE CYCLE BRAYTON CYCLE COMBINED CYCLE BASIC TERMINOLOGIES: BASIC TERMINOLOGIES HEAT RATE: The performance of a power generation unit is conventionally measured in terms of its heat rate—i.e., the amount of heat that has to be supplied to the feedwater in order to produce a specified generator power output. (KJ/KW-h) ENTROPY: is the measure of uncertainty or randomness. (J/K) Enthalpy : is a measure of the total energy of a thermodynamic system. (J) BASIC TERMINOLOGIES (cnt..): BASIC TERMINOLOGIES ( cnt ..) EFFICIENCY: tells how better the system is. Thermal Efficiency: Heat equivalent of mech. energy transmitted to turbine shaft/Heat of coal combustion. Overall Efficiency: Heat equivalent of electrical output/Heat of combustion of coal. RANKINE CYCLE OF SUB-CRITICAL POWER PLANT: RANKINE CYCLE OF SUB-CRITICAL POWER PLANT PowerPoint Presentation: RANKINE CYCLE OF SUPER-CRITICAL POWER PLANT PowerPoint Presentation: BRAYTON CYCLE PowerPoint Presentation: Brayton Cycle with Compressor inter-cooling PowerPoint Presentation: Brayton Cycle with Water Injection PowerPoint Presentation: Common power cycle thermal efficiencies Simple Steam Cycle: 25%-35% Generator steam at high pressure exhaust steam from steam turbine to condenser. Simple Gas Turbine: 30%-35% Gas turbine driven generator with exhaust to atmosphere. Combined cycle: 50%-60% Gas Turbine driven generator with exhaust used to make high pressure steam, and high pressure steam used to generate additional electricity in steam turbine. Gas Turbine-Process Steam: 75%-85% Gas turbine driven generator with exhaust used to make low pressure steam for process. PowerPoint Presentation: FEW QUESTIONS How to increase efficiency in case of Rankine Cycle? Why we can’t reduce vacuum in condenser below 0.1 absolute pressure? PowerPoint Presentation: In thermodynamics, the triple point of a substance is the temperature and pressure at which three phases (for example, gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium .