A fossil-fuel steam power plant operates at about 50% of Carnot thermal efficiency. It has been...
A fossil-fuel steam power plant operates at about 50% of Carnot thermal efficiency. It has been suggested that the air pollution from a plant that operates at 1000 F would contribute 1/2 the pollution (per ton of coal burned) that the present system that operates at about 1500 F. The heat rejection temperature is 70 F. For the same electrical output what is the percent difference in the pollution resulting from the combustion? Assume that the thermal energy released by the combustion process is proportional to the pollution created.
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A fossil-fuel steam power plant operates at about 50% of Carnot
thermal efficiency. It has been...
A coal-fired steam power plant produces 175 MW of electric power. The power plant operates on...
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...
5. A coal fired plant generates 1000 MW of power with a thermal efficiency of 4070....
5. A coal fired plant generates 1000 MW of power with a thermal efficiency of 4070. a. What is the heat input to the plant? b. If the plant burns anthracite coal with a heat of combustion of 26.5 MJ/kg, how much coal (in kg) does the plant use per day? c. How much heat is rejected to the river nearby? Assume all waste heat goes to ine ne d. Assume the efficiency is very near the Carnot efficiency. If...
A typical coal-fired power plant burns 290 metric tons of coal every hour to generate 800...
A typical coal-fired power plant burns 290 metric tons of coal every hour to generate 800 MW of electricity. 1 metric ton= 1000 kg. The density of coal is 1500 kg/m3 and its heat of combustion is 28 MJ/kg. Assume that all heat is transferred from the fuel to the boiler and that all the work done in spinning the turbine is transformed into electrical energy. Part A)Suppose the coal is piled up in a 8.0 m × 11 m...
Need help for A, B, and C, thanks. 1. an electrical power plant has an overall...
Need help for A, B, and C, thanks. 1. an electrical power plant has an overall efficiency of 15%. The plant is to deliver 150 MW of electrical power to a city, and it turbines use coal as fuel. The burning coal produces steam at 190 C, which droves the turbines. The steam is condensed into water at 25C by passing through coils that are in contact with river water. Note: the heat of combustion of coal is 7.8 X...
A typical coal-fired power plant burns 320 metric tons of coal every hour to generate 2.6×106...
A typical coal-fired power plant burns 320 metric tons of coal every hour to generate 2.6×106 MJ of electricity. 1 metric ton = 1000 kg; 1 metric ton of coal has a volume of 1.5 m3. The heat of combustion is 28 MJ/kg. Assume that all heat is transferred from the fuel to the boiler and that all the work done in spinning the turbine is transformed into electrical energy. 1. Suppose the coal is piled up in a 10...
Thermo (25) 7. A steam power plant operates on the Rankine cycle with steam entering the...
Thermo
(25) 7. A steam power plant operates on the Rankine cycle with steam entering the high pressure turbine at 1500 psi, 1000'C with a mass flow rate of 5x10lb/hr. The steam exits the high pressure turbine at 90 psi, 350°F where the steam is then sent back to the boiler and reheated to 900°F before expanding through the low pressure turbine to 1 psi. Cooling water enters the condenser from a lake at 65°F and exits at 90°F Assume...
A typical coal-fired power plant burns 310 metric tons of coal every hour to generate 2.8×106...
A typical coal-fired power plant burns 310 metric tons of coal every hour to generate 2.8×106 MJ of electricity. 1 metric ton = 1000 kg; 1 metric ton of coal has a volume of 1.5 m^3. The heat of combustion is 28 MJ/kg. Assume that all heat is transferred from the fuel to the boiler and that all the work done in spinning the turbine is transformed into electrical energy. (A) Suppose the coal is piled up in a 12...
A typical coal-fired power plant burns 270 metric tons of coal every hour to generate 2.9x10^6...
A typical coal-fired power plant burns 270 metric tons of coal every hour to generate 2.9x10^6 MJ of electricity. 1 metric ton= 1000 kg; 1 metric ton of coal has a volume of 1.5m^3. The heat combustion is 28 MJ/kg. Assume that all heat is transferred from the fuel to the boiler and that all the work done in spinning the turbine is transformed into electrical energy. a) Suppose the coal is piled up in a 10m x 11m room....
A typical coal-fired power plant generates 1000 MW of usable power at an overall thermal efficiency...
A typical coal-fired power plant generates 1000 MW of usable power at an overall thermal efficiency of 37%. Part A What is the rate of heat input to the plant? Part B The plant burns anthracite coal, which has a heat of combustion of 2.65×107J/kg. How much coal does the plant use per day, if it operates continuously? Part C At what rate is heat ejected into the cool reservoir, which is the nearby river? Part D The river's temperature is...
A combined gas–steam power plant has been designed with a net power output of 450 MW....
A combined gas–steam power plant has been designed with a net power output of 450 MW. The pressure ratio of the gas-turbine cycle is 14. Air enters the compressor at 300 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 8 MPa to 400 C in a heat exchanger. The combustion gases leave the heat exchanger at 460 K. An open feedwater heater incorporated with the steam cycle...
5. A coal fired plant generates 1000 MW of power with a thermal efficiency of 4070. a. What is the heat input to the plant? b. If the plant burns anthracite coal with a heat of combustion of 26.5 MJ/kg, how much coal (in kg) does the plant use per day? c. How much heat is rejected to the river nearby? Assume all waste heat goes to ine ne d. Assume the efficiency is very near the Carnot efficiency. If...
Thermo
(25) 7. A steam power plant operates on the Rankine cycle with steam entering the high pressure turbine at 1500 psi, 1000'C with a mass flow rate of 5x10lb/hr. The steam exits the high pressure turbine at 90 psi, 350°F where the steam is then sent back to the boiler and reheated to 900°F before expanding through the low pressure turbine to 1 psi. Cooling water enters the condenser from a lake at 65°F and exits at 90°F Assume...
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