Sustainable Energy
1st Edition
ISBN: 9781133108689
Author: Richard A. Dunlap
Publisher: Cengage Learning
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Chapter 3, Problem 7P
To determine
Calculate the amount of coal each person process, on average, per day.
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Consider a 400-MW, 32 percent efficient coal-fired power plant that uses cooling water withdrawn from a nearby river (with an upstream flow of 10-m3/s and temperature 20 °C) to take care of waste heat.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.
According to the Energy Information Administration, Dept, of Energy, which country produced the largest amount of CO2 emissions from the burning of fossil fuels, in Gt in 2006?
Due to the global warming and some other climate issues, there has been frantic efforts by states and other key stakeholders in the energy value chain to curb exploration, combustion and usage of fossil fuel. As an energy engineer, what are some of the challenges of the conversion process and their mitigation?
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- Calculate the total mass of CO2 in the atmosphere. State all assumptions. Compare this to the actual of ~3.6 ×1012 tonnes. At our current rate of emissions, how long would it take to emit a quantity equal to the present mass of CO2 in the atmospherearrow_forwardA petroleum refinery processes 100,000 barrels of crude oil per day and operates with an energy efficiency of 90%. The oil and the petroleum products have enrgy contents of 35 MJ/L. What are the energy and fuel volume flows to and from this refinery, in J/day? ( One barrel of oil is 159 liters).arrow_forward
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