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1. Why is excessive moisture in steam undesirable in steam turbines? What is the highest moisture content allowed?

1. Why is excessive moisture in steam undesirable in steam turbines? What is the highest moisture content allowed?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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1. Why is excessive moisture in steam undesirable in steam turbines? What is the highest moisture content allowed? 2. Why is the Carnot cycle not a realistic model for steam power plants? 3. Consider a simple ideal Rankine cycle with fixed turbine inlet conditions. What is the effect of lowering the condenser pressure on Pump work input: (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, Turbine work output: Heat supplied: Heat rejected: Cycle efficiency: Moisture content at turbine exit: (c) remains the same 4. Consider a simple ideal Rankine cycle with fixed boiler and condenser pressures. What is the effect of superheating the steam to a higher temperature on Pump work input: (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, Turbine work output: Heat supplied: Heat rejected: Cycle efficiency: Moisture content at turbine exit: (c) remains the same 5. How do actual vapor power cycles differ from idealized ones? 6. Is it possible to maintain a pressure of 10 kPa in a condenser that is being cooled by river water entering at 20°C? 7. Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal Power Plant? a) reheating of steam at intermediate stage b) regeneration use of steam for heating Boiler feed water c) using high pressures d) all of the mentioned
Transcribed Image Text:1. Why is excessive moisture in steam undesirable in steam turbines? What is the highest moisture content allowed? 2. Why is the Carnot cycle not a realistic model for steam power plants? 3. Consider a simple ideal Rankine cycle with fixed turbine inlet conditions. What is the effect of lowering the condenser pressure on Pump work input: (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, Turbine work output: Heat supplied: Heat rejected: Cycle efficiency: Moisture content at turbine exit: (c) remains the same 4. Consider a simple ideal Rankine cycle with fixed boiler and condenser pressures. What is the effect of superheating the steam to a higher temperature on Pump work input: (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, Turbine work output: Heat supplied: Heat rejected: Cycle efficiency: Moisture content at turbine exit: (c) remains the same 5. How do actual vapor power cycles differ from idealized ones? 6. Is it possible to maintain a pressure of 10 kPa in a condenser that is being cooled by river water entering at 20°C? 7. Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal Power Plant? a) reheating of steam at intermediate stage b) regeneration use of steam for heating Boiler feed water c) using high pressures d) all of the mentioned
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