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Coal burned in power plants in the United States has a energy content of approximately 24 kJ/g and an average carbon content of about 62 percent (by wt). For almost all new coal plants, Clean Air Act emission standards limit emissions of sulfur dioxide (SO2) to 260 grams per million kJ of heat input (fuel value). They also restrict particulateemissions to 13 g/106 kJ.Suppose the average plant burns fuel with 2% sulfur content (by wt) and 8% unburnable minerals called "ash." About 70% of the ash is released as "fly ash" and about 30% settles out of the firing chamber and is collected as "bottom ash." Assume that this is a typical coal plant with 3 units of heat energy required to deliver 1 unit of electricalenergy.
a) Calculate the emissions of sulfur dioxide, particulates (fly ash), and carbon dioxide per kilowatt-hour of electrical energy produced. Assume that all of the carbon in the coal is released to the atmosphere.
b) Calculate the efficiency (percent removal) of the sulfur emission control system required to meet the sulfur emission limitations.
c) Calculate the efficiency of the particulate emission control system required to meet the particulate emission limitations.
the flow profile is such that u=u(max)*(1-(r/R)^2) where u is the flow speed and r is the distance from the centre of the pipe in the radial direction. What is the shear stress on the pipe wall What is the shear force exerted by the oil on a 1m lo..
A trapezoidal channel is carrying water at a normal depth of 5.2 ft, the channel has a bottom width of 10 ft and side slopes of 2 H to 1 V. It is running on a slope of 0.005 ft/ft. What will be the shear stress in lb/ft^2 exerted on the channel be..
A confined aquifer has a specific storage of 2.5 * 10^-6 /m . The porosity is .20 and the water compressibility is 5 * 10-10/Pa.For the aquifer skeleton compressibility you just calculated, what would the aquifer specific storage be if porosity were ..
Determine the diameter (in inches) and velocity (feet per second) of a concrete storm pipe required to carry a peak flowrate of 20 cfs at a slope of 1.0% Design the pipe to flow at 75% capacity and use a Mannings n of 0.013.
Ball A is thrown vertically upward from the top of a 20-{\rm m}-high-building with an initial velocity of 3m/s . At the same instant another ball B is thrown upward from the ground with an initial velocity of 16m/s .
Two box culverts each is 0.61 m by 0.61 m and has n = 0.013, Ke = 0.05, Cd = 0.85, L = 30 m, So = 0.7%, and HW = 1.5 m. a. What is the design flow capacity for free outlet condition b. What is the design flow capacity for tailwater of TW = 1 m
Conduct either a qualitative or quantitative risk assessment on this project. Identify the risk factors that you consider most important for the suspension bridge construction. How would you assess the riskiness of the project? Why?
(a) At what angle did the player have to shoot the cue ball so that the eight ball entered the pocket at C? (b) In what direction did the cue ball move after the collision? (c) What percentage of its kinetic energy did the cue ball impart to the e..
Calculate the fraction of total atrazine that will be adsorbed to the soil given that the soil has an organic carbon content of 2.5%. The bulk density of the soil is 1.25 g/cm3; this means that each cubic centimeter of soil (soil plus water) conta..
a freeway exit ramp has a single lane and consists entirely of a horizontal curve with a central angle of 90 degrees and a length of 628 ft. if the distance cleared from the centerline for sight distance is 19.4ft, what design speed was used
determine critical depth in a circular pipe of 36 inches diameter and roughness coefficient of 0.015. The flow rate is 15 cfs. So = 0.002
Suppose a sample of the 90 °C air is put in a closed variable-volume chamber containing a mirror, and the pressure is raised at constant temperature until a mist forms on the mirror. At what pressure would the mist form
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