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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 particulate emissions 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 electrical energy.
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.
In what direction did the cue ball move after the collision? What percentage of its kinetic energy did the cue ball impart to the eight ball?
develop a simple urban constructed wetland design guidelines and drawings. your report should include the followingi.
The diameter of the soil column is 8.0 cm, the length of the soil column is 16.0 cm. The hydraulic head loss across the soil specimen is 6.4 cm. Over a period of 3 min, 350 mL of water is collected at the downstream side of the soil specimen.
a bearing wall carries a dead load of 120kn/m and live load of 100 kn/m. It is to be supported on a 400mm deep continuous footing underlain by a medium sand (unit weight = 19.2 kn/m3, phi= 37 deg, effective c = 0).
At the beginning of compression the pressure is 14 psi and the temperature if 60°F. The temperature at the end of combustion heat addition is 1500°F and the compression ratio is 9. Use constant specific heats at room temperature
Assume the section has cracked and use the transformed area method to compute their flexural stresses for the load. Given: Beam 30 ft long with uniform load of 2 k/ft and a point load of 30 k at 10 ft.
Diesel fuel has an average chemical formula of C12H23 and a density of 6.45 lb/gal. Calculate how many lbs of CO2 are produced per gallon of diesel burned (assume complete combustion).
What are the annual runoff coefficient (Runoff/Rainfall ratio) for the sub areas and for the total watershed taken as whole Sub-area Area (m2)/ Annual Precipitation (mm)/ Annual Evaporation (mm) A 10.7 1030 530 B 3.0 830 438 C 8.2 900 430 D 17...
A body slides down a frictionless plane and during the third second after starting from rest if it travels 20.4m. What is the angle of inclination of the plane?
A galvanized (zinc-coated) steel sheet is found to uniformly corrode with an average current density of 1.4 X 10-7 A/cm2. How many years will it take to uniformly corrode a thickness of 0.030 mm of the zinc coating?
Properties of frozen tissues have been measured as part of understanding the response of tissue to cryopreservation. In one set of experiments, frozen bovine carotid arteries were tested in uniaxial tension.
The posItIon of a particle along a straight line is given by s = (t 3 - 9t 2 + 1St) ft, where t is in seconds. Determine its maximum acceleration and maximum velocity during the time interval 0 :5: t :5: 10 s.
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