SUSTAINABLE ENERGY (LL)
2nd Edition
ISBN: 9780357667224
Author: DUNLAP
Publisher: CENGAGE L
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Chapter 3, Problem 4P
(a)
To determine
Find the amount of coal burned per second.
(b)
To determine
Calculate the amount of
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A 60 MW steam power station has a thermal efficiency of 30%. If the coal burnt has a calorific value of6950 kcal/kg, calculate :(i) the coal consumption per kWh,(ii)the coal consumption per day.
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How much coal would need to be burned to provide enough energy to meet a person's energy demands if the efficiency of energy production from coal is 38%?
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A 1000 MW coal fired power plant (30% efficiency). The coal is 75% carbon and has a heat content of 10, 000 BTU/lb. What is the carbon emission (ton carbon per year)?A 1000 MW natural gas plant (45% efficiency). The gas is CH4 with a heat content 800 BTU/mol. What is the carbon emission (ton carbon per year)?Calculate carbon emission reduction if the above natural gas plant is used to replace the coal fired plant.(Here ton is metric ton, 1 ton=2,200 lb)
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- Consider a 400-MW, 32 percent efficient coal-fired power plant that uses cooling water withdrawn from a nearby river (with an upstream flow of 10-m3/s and temperature 20 °C) to take care of waste heat. The heat content of the coal is 8,000 Btu/lb, the carbon content is 60% by mass, and the sulfur content is 2% by mass. How much electricity (in kWh/yr) would the plant produce each year? How many pounds per hour of coal would need to be burned at the plant? Estimate the annual carbon emissions from the plant (in metric tons C/year). If the cooling water is only allowed to rise in temperature by 10 °C, what flow rate (in m3/s) from the stream would be required? What would be the river temperature if all the waste heat was transferred to the river water assuming no heat losses during transfer? Estimate the hourly SO2 emissions (in kg/h) from the plant assuming that all the sulfur is oxidized to SO2 during combustion.arrow_forwardProblem 3. A nuclear-power station produces 750 MW per year as useful energy. costs include 150 MW lost in distribution, and 290 MW lost as heat. What is the efficiency of the plant? The energyarrow_forwardA diesel engine required 9,800 kJ of heat to produce 1,800 kJ of power. What is its efficiency?arrow_forward
- In 2016, about 30 million tons of combustible municipal solid waste (MSW) was generated in the United States. One ton of MSW burned in waste-to-energy plants in the United States, generated about 474 kWh of electricity. If the average annual electricity consumption for a U.S. residential utility customer was 10,399 kilowatthours (kWh). How many households could use this amount of electricity?arrow_forwardA 600 MW coal-fired power plant has an overall thermal efficiency of 38%. It is burning coal that has a heating value of 12,000 Btu/lb, an ash content of 5%, a sulfur content of 3,0%, and a CO2 emission factor of 220 IWmillion Bin. Calculate the heat emitted to the environment (Btu/sec), the coal feed rate (tons/day), the degree (%) of sulfur dioxide control needed to meet an emission standard of 0,15 lh SO2/inillion Bin of heat input, and the CO2 emission rate (metric tons/day).arrow_forwardThe principal component of LPG is butane, C4H10 (g). If combustion of 1 mole ofbutane produces 126 kJ of heat, how much heat can be generated by completecombustion of one 11.0 kg gas tank?arrow_forward
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