One tonne of coal, if fully burned, releases 28 Gigajoules (GJ) of thermal energy. However, for...
One tonne of coal, if fully burned, releases 28 Gigajoules (GJ) of thermal energy. However, for each tonne of coal burned in its boiler, a modern electrical power plant produces only 9.5 GJ of electrical energy.
a) Which law of nature explains the difference? [1 Mark]
b) What is the energy conversion efficiency of such a power plant? [1 Mark]
c) If the electrical transmission and distribution network between the power plant and your home has an efficiency of 93%, then how much electrical energy is ultimately delivered to customers from that original tonne of coal? [1 Mark]
d) What has happened to the energy stored in the coal that did not reach customers? [1 Mark]
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One tonne of coal, if fully burned, releases 28 Gigajoules (GJ)
of thermal energy. However, for...
When coal is burned in a power plant, it releases approximately 30 kJ of energy for...
When coal is burned in a power plant, it releases approximately 30 kJ of energy for every gram of coal that undergoes combustion. A percentage of the energy is used to generate electrical power, and the rest of the energy is lost as heat. Determine the amount of energy used, in joules, of a 40.0 W light bulb that is left on for 1.70 h. energy Determine the amount of electrical power, in watts, generated by a circuit that uses...
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...
A typical coal-fired power plant burns 290 metric tons of coal every hour to generate 800...
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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 fossil-fuel steam power plant operates at about 50% of Carnot thermal efficiency. It has been...
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When coal is burned in a power plant, it releases approximately 30 kJ of energy for every gram of coal that undergoes combustion. A percentage of the energy is used to generate electrical power, and the rest of the energy is lost as heat. Determine the amount of energy used, in joules, of a 40.0 W light bulb that is left on for 1.70 h. energy Determine the amount of electrical power, in watts, generated by a circuit that uses...
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