A coal-fired steam power plant produces 175 MW of electric power. The power plant operates on a Rankine cycle with turbine inlet conditions of 7 MPa and 550oC and a condenser pressure of 15 kPa. The turbine efficiency and pump efficiency are both 0.8. The coal has a heating value (energy released when the fuel is burned) of 29,300 kJ/kg. Assuming that 85 percent of this energy is transferred to the steam in the boiler and that the electric generator has an efficiency of 96 percent, determine
(a) the overall plant efficiency (the ratio of net electric power output to the energy input as fuel) and
(b) the required rate of coal supply
c) fill the table
stream |
state |
T(C) |
P(kPa) |
H(kj/kg) |
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A coal-fired steam power plant produces 175 MW of electric power. The power plant operates on...
Consider a coal-fired steam power plant that produces 175 MW of electric power. The power plant operates on a simple ideal Rankine cycle with turbine inlet conditions of 8 MPa and 560°C and a condenser pressure of 8 kPa. The coal has a heating value (energy released when the coal is burned) of 29,300 kJ/kg and a CO2 emission value of 0.093 kg CO2/MJ. Assuming that 85% of this energy is transferred to heat in the boiler and that the...
Consider a steam power plant that operates on the ideal regenerative Rankine cycle with a closed feedwater heater as shown in the figure. The plant maintains the turbine inlet at 3000 kPa and 3508C; and operates the condenser at 20 kPa. Steam is extracted at 1000 kPa to serve the closed feedwater heater, which discharges into the condenser after being throttled to condenser pressure. Calculate the work produced by the turbine, the work consumed by the pump, and the heat...
A Rankine Cycle based steam power plant produces 200 MW of power. Steam exits the boiler at 3 MPa and 500° C. The turbine exit is at 40 kPa. Isentropic efficiencies of the turbine and pump are 75% and 70% respectively. Show the cycle on a T-s diagram Calculate the mass flow rate of steam Determine the heat transfer rates in the boiler and condenser in MW Determine the cycle efficiency Determine the mass flow rate of the condenser cooling...
10-48 Consider a steam power plant that operates on the ideal regenerative Rankine cycle with a closed feedwater heater as shown in the figure. The plant maintains the turbine inlet at 3000 kPa and 350°C; and operates the condenser at 20 kPa. Steam is extracted at 1000 kPa to serve the closed feedwater heater, which discharges into the condenser after being throttled to condenser pressure. Calculate the work pro- duced by the turbine, the work consumed by the pump, and...
10-55 Consider a steam power plant that operates on the ideal regenerative Rankine cycle with a closed feedwater heater as shown in the figure. The plant maintains the turbine inlet at 3000 kPa and 350°C and operates the condenser at 20 kPa. Steam is extracted at 1000 kPa to serve the closed feedwater heater, which discharges into the condenser after being throt- tled to condenser pressure. Calculate the work produced by the turbine, the work consumed by the pump, and...
Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500°C and is cooled in the condenser at a pressure of 10 kPa. Assume an isentropic efficiency of 85 percent for both the turbine and the pump. (a) the quality of the steam at the turbine exit (b) the thermal efficiency of the cycle (c) the mass flow rate of the steam.
Question 16 A steam power plant operates on a Rankine cycle. The steam enters the turbine at 10,000 kPa and 580'C. It is condensed in the condenser at 6 kPa. The isentropic efficiencies of the pump and turbine are 95% and 94% respectively. Determine the following Properties: h1 = 151.53 kJ/kg, n 1-0.0010064 m g . h3 - 3573.7 kJ/kg, X ds = 0.8097 hg. 4 2416.62 kJ/kg a. Work input to the pump in (kJ/kg) b. Heat added in...
Section B – combined cycles Overview: a combined gas – steam power cycle in Sweden provides electricity and hot water for heating duties for a small city. The gas turbine drives an electricity generator with an efficiency of 97%. A sub-critical coal fired boiler is used as a heat recovery steam generator, as well as providing additional steam from coal during the winter months. The steam turbine drives an electricity generator with an efficiency of 95%. The plant is located...
1. A Steam Power Plant that operates on an ideal regenerative Rankine Cycle with an open feedwater heater is considered. The turbine inlet conditions are 6 MPa, 450 C. The regeneration pressure is 0.4 MPa. The condenser pressure is 20 kPa. a) Draw the T-s diagram, and the sketch of the steam power plant. b) Calculate the low pressure pump work. c) Calculate the high pressure pump work. d) Calculate the fraction of the steam extracted from the turbine for...
C and D please. AGL Energy is expanding the capacity of the Liddell Power Station. The plan is to commission a steam turbine power plant that operates on a regenerative Rankine cycle and has a net power output of 150 MW where steam enters the turbine at 10 MPa and 500°C, and the condenser at 10 kPa. The isentropic efficiency of the turbine is 80 percent, and that of the both pump is 95 percent. Steam is extracted from the...