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Questions and Answers
What is the overall efficiency of the unit in percent if it consumes 3 kg of coal per second as received having a value of 25,102 kJ/kg?
What is the overall efficiency of the unit in percent if it consumes 3 kg of coal per second as received having a value of 25,102 kJ/kg?
- 80.67
- 88.28
- 78.82
- 65.72 (correct)
What is the thermal efficiency of the Rankine cycle if steam enters the turbine at 2.5 MPa and the condenser is at 50 kPa?
What is the thermal efficiency of the Rankine cycle if steam enters the turbine at 2.5 MPa and the condenser is at 50 kPa?
- 45.23%
- 12.34%
- 25.55% (correct)
- 34.23%
If a thermal power plant generates 5 MW and the heat generated by fuel is 13,000 kJ/s, what is the power needed for the auxiliaries if the thermal efficiency is 36.15%?
If a thermal power plant generates 5 MW and the heat generated by fuel is 13,000 kJ/s, what is the power needed for the auxiliaries if the thermal efficiency is 36.15%?
- 400 kW
- 300 kW
- 310 kW (correct)
- 350 kW
In a superheat steam Rankine cycle, what should be the pump work in kJ/kg if the turbine inlet conditions are 17.5 MPa and 530°C and the turbine and pump polytropic efficiencies are 0.85 and 0.75 respectively?
In a superheat steam Rankine cycle, what should be the pump work in kJ/kg if the turbine inlet conditions are 17.5 MPa and 530°C and the turbine and pump polytropic efficiencies are 0.85 and 0.75 respectively?
In an open feedwater heater for a steam plant, what is the mass flow rate of the subcooled liquid if the steam flow rate is 0.865 kg/s and the heater efficiency is 95%?
In an open feedwater heater for a steam plant, what is the mass flow rate of the subcooled liquid if the steam flow rate is 0.865 kg/s and the heater efficiency is 95%?
What is the enthalpy of steam at 5 MPa and 400°C?
What is the enthalpy of steam at 5 MPa and 400°C?
What is the entropy of steam at 2.5 MPa?
What is the entropy of steam at 2.5 MPa?
What is the specific volume of water at 50 kPa?
What is the specific volume of water at 50 kPa?
What is the latent heat of vaporization at 7 bar?
What is the latent heat of vaporization at 7 bar?
What is the enthalpy of saturated liquid at 7 bar?
What is the enthalpy of saturated liquid at 7 bar?
