By reducing the condenser pressure in Rankine power plant

Related MCQs

• A steam power plant working on Rankine cycle produces steam in the boiler at a rate of 100 kg/s with enthalpy of 3280 kJ/kg from water whose total heat content is 420 kJ/kg. The plant has Rankine efficiency of 24.65 while pump requires 5 kJ/kg of work. The turbine generates power of
• Correlate the following statements i) by reducing the condenser pressure in a Rankine cycle work output is increased ii) increased proportion of moisture in turbine is undesirable because water particles erode the blades
• Considerfollowing options for a simple Rankine cycle i) increasing pressure at exist of turbine ii) increasing average temperature of heat addition iii) decreasing pressure at exit of turbine iv) superheating of steam v) decreasing pressure during superheating. Which combination of above will increase Rankine efficiency?
• Correlate the following statements i) the volume of water into which steam is condensed in condenser is very much smaller than the volume of steam before condensation ii) the net work of a Rankine cycle is heat supplied in boiler - heat rejected to condenser - pump work
• Consider the following statements regarding superheating in Rankine Cycles 1. It reduces the specific steam consumption 2. It increases the dryness fraction of steam at the exhaust for the same value of condenser pressure 3. It reduces the cycle efficiency Of the these statements
• A simple Rankine cycle operates the Boiler at 3 MPa with an outlet temperature of 350°C and the Condenser at 50 kPa. Assuming ideal operation and processes, what is the thermal efficiency of this cycle?
• In a regenerative Rankine cycle as compared to simple Rankine cycle
• Rankine cycle efficiency of a good steam power plant may be in the range of
• Essential parts of a power plant operating on a Rankine cycle are
• Examine follwing two statements & choosethe correct relationship i) for a steam power plant Rankine cycle is preferred over Carnot cycle ii) a pump which will handle the mixture of vapour & liquid is difficult to construct