20 kg/sec of water enters the boiler of a power plant. The plant burns 12500 kg/hour...
20 kg/sec of water enters the boiler of a power plant. The plant burns 12500 kg/hour of coal, with a heating value of 27 MJ/kg. If the enthalpy change of the liquid/steam across the boiler is 3281 kj/kg, what is the efficiency of the boiler?
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20 kg/sec of water enters the boiler of a power plant. The plant
burns 12500 kg/hour...
Please answer Questions e-f-g-h: (a) The boiler of a power plant operates at a maximum temperature...
Please answer Questions e-f-g-h: (a) The boiler of a power plant operates at a maximum temperature of 750oC. The condenser of the power plant draws in cooling water at 20oC. What is the theoretical maximum efficiency of the plant? (b) Now suppose that a real power plant is built to have an efficiency that is 80% of the theoretical efficiency. The power plant needs to generate 1GW (giga-watt) of power. How much energy (per second) needs to be supplied by...
Consider a coal-fired steam power plant that produces 175 MW of electric power. The power plant o...
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...
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...
Superheated steam at 20 MPa, 560oC enters the turbine of a vapor power plant. The pressure...
Superheated steam at 20 MPa, 560oC enters the turbine of a vapor power plant. The pressure at the exit of the turbine is 0.7 bar, and liquid leaves the condenser at 0.4 bar at 75oC. The pressure is increased to 20.1 MPa across the pump and the specific enthalpy is 338.14 kJ/kg. The turbine isentropic efficiency is 81%. Cooling water enters the condenser at 20oC with a mass flow rate of 70.7 kg/s and exits the condenser at 38oC. For...
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...
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....
Turbine - 3) Water enter the boiler in a steam power plant at a rate of...
Turbine - 3) Water enter the boiler in a steam power plant at a rate of 2kg/s, a velocity of 12m/s and an enthalpy of 650 KJ/Kg where it absorbs 1850 KJ/Kg. the water transform into steam, enter the turbine and exit having an enthalpy of 3710 KJ/Kg and a velocity of 45 m/s. the height difference between the inlet of the boiler and the the turbine exit is 4 m. Considering that the heat loss from the turbine is...
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...
Water is the working fluid in a Carnot vapor power cycle. Saturated liquid enters the boiler...
Water is the working fluid in a Carnot vapor power cycle.
Saturated liquid enters the boiler at a pressure of 160 bar, and
saturated vapor enters the turbine. The condenser pressure is 0.08
bar. Determine
(a) the thermal efficiency.
(b) the back work ratio.
(c) the heat transfer to the working fluid per
unit mass passing through boiler, in kJ/kg.
(d) the heat transfer from the working fluid per
unit mass passing through the condenser, in kJ/kg.
Problem 8.03 Water...
Turbine - 3) Water enter the boiler in a steam power plant at a rate of 2kg/s, a velocity of 12m/s and an enthalpy of 650 KJ/Kg where it absorbs 1850 KJ/Kg. the water transform into steam, enter the turbine and exit having an enthalpy of 3710 KJ/Kg and a velocity of 45 m/s. the height difference between the inlet of the boiler and the the turbine exit is 4 m. Considering that the heat loss from the turbine is...
Water is the working fluid in a Carnot vapor power cycle.
Saturated liquid enters the boiler at a pressure of 160 bar, and
saturated vapor enters the turbine. The condenser pressure is 0.08
bar. Determine
(a) the thermal efficiency.
(b) the back work ratio.
(c) the heat transfer to the working fluid per
unit mass passing through boiler, in kJ/kg.
(d) the heat transfer from the working fluid per
unit mass passing through the condenser, in kJ/kg.
Problem 8.03 Water...
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