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1. The turbine work and the pump work in a Rankine cycle are 1200 kJ/kg and 20 kJ/kg respectively. What is the efficiency of the cycle if the heat generated by the generator is 3000 kJ/kg ?

1. The turbine work and the pump work in a Rankine cycle are 1200 kJ/kg and 20 kJ/kg respectively. What is the efficiency of the cycle if the heat generated by the generator is 3000 kJ/kg ?

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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Problem: 1. The turbine work and the pump work in a Rankine cycle are 1200 kJ/kg and 20 kJ/kg respectively. What is the efficiency of the cycle if the heat generated by the generator is 3000 kJ/kg ? 2. In a Ideal Rankine cycle, the steam throttle condition is 4.10 MPa and 440 °C. If turbine exhaust is 0.105MPa, determine the steam rate in kg/kW-Hr. Draw the Ts diagram. 3. Steam is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 9 MPa and saturated liquid exits the condenser at 0.009 MPa. The net power output of the cycle is 100 MW. Determine the mass flow rate of steam in kg/s. Draw the Ts diagram. 4. in an ideal Rankine cycle, water is the working fluid. Saturated vapor enters the turbine at 6.9 MPa. The condenser pressure is 6.9 kPa. Determine (a) the net work per unit mass of steam flow in kJ/kg, (b) the heat transfer to the steam passing through the boiler in kJ/kg. Draw the schematic and Ts diagram. 5. Consider a steam power plant operating on the ideal Rankine cycle. The steam enters the turbine at 5 MPa, 350 °C and is condensed in the condenser at a pressure of 15 kPa. Determine the thermal efficiency of the cycle if the steam were superheated to 750 °C. Draw the schematic and Ts diagram.
Transcribed Image Text:Problem: 1. The turbine work and the pump work in a Rankine cycle are 1200 kJ/kg and 20 kJ/kg respectively. What is the efficiency of the cycle if the heat generated by the generator is 3000 kJ/kg ? 2. In a Ideal Rankine cycle, the steam throttle condition is 4.10 MPa and 440 °C. If turbine exhaust is 0.105MPa, determine the steam rate in kg/kW-Hr. Draw the Ts diagram. 3. Steam is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 9 MPa and saturated liquid exits the condenser at 0.009 MPa. The net power output of the cycle is 100 MW. Determine the mass flow rate of steam in kg/s. Draw the Ts diagram. 4. in an ideal Rankine cycle, water is the working fluid. Saturated vapor enters the turbine at 6.9 MPa. The condenser pressure is 6.9 kPa. Determine (a) the net work per unit mass of steam flow in kJ/kg, (b) the heat transfer to the steam passing through the boiler in kJ/kg. Draw the schematic and Ts diagram. 5. Consider a steam power plant operating on the ideal Rankine cycle. The steam enters the turbine at 5 MPa, 350 °C and is condensed in the condenser at a pressure of 15 kPa. Determine the thermal efficiency of the cycle if the steam were superheated to 750 °C. Draw the schematic and Ts diagram.
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