10 Questions
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?
65.72
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?
25.55%
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%?
310 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?
25.32
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%?
2.869 kg/s
What is the enthalpy of steam at 5 MPa and 400°C?
3195.7 kJ/kg
What is the entropy of steam at 2.5 MPa?
6.2575 kJ/kg-K
What is the specific volume of water at 50 kPa?
0.00103 m³/kg
What is the latent heat of vaporization at 7 bar?
1640.1 kJ/kg
What is the enthalpy of saturated liquid at 7 bar?
697.22 kJ/kg
Quiz questions on thermodynamics and jet engines, including ideal Brayton cycles and turbojet engines.
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