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Power plant burns 150,000 tonnes (1 tonne = 1,000 kg) of coal each year. The coal has a 2.5% sulfur content, and the air pollution control equipment removals approximately 94% of sulfur. Assume 10% of the sulfur content ends up in the ash. The remaining combustion products are discharged through an 80 m stack with a diameter of 3.0 m. The stack off gas temperature and velocity are 320 oC and 4 m/s, respectively, and the atmospheric conditions are 102 kPa and 25 oC. If the atmospheric conditions are slightly unstable (Class C) and the wind velocity at 10 m elevation is 3.5 m/s:
1. Plot the ground level concentration of sulfur dioxide as a function of distance from the stack and determine the maximum ground level concentration at both with and without air pollution control and the distance from the stack where the maximum concentration occurs.
2. With air pollution control equipment in place, plot the contours for a ground level concentration that is half and ¼ of the maximum value and indicate on your plot the location of the stack and the location of the point where the maximum ground level concentration would occur.
A business wishes to discharge salt into a river. the concentration of salt from the business is 210 mg/L. the flow of water in the river (upstream) is 0.5 m^3/s. Upstram the concentration of salt in the river 15 mg/L.
Water are mixed with 150g of another fluid (density = 790 kg/m3 ). What is the specific volume of the mixture, assuming that the volumes are additive and the mixture is homogeneous?
compute the allowable load on a column with fixed ends if it is 5.45 meters long and made from an S150 x 18.6(S6 x 12.5) beam. The material is ASTM A36 steel. Use the AISC formula.
A conversion of land from tomato farming to cotton is planned. Is it true that less water will be used to supplement rainfall based on one growing season ?
A nuclear power plant produces heat through fission of uranium which is used to create high pressure steam. The steam expands through a turbine to a low pressure in order to produce work which drives a generator to produce electric power.
An engineering student, recognizing that the "ideal gas law" requires gas velocity to be function of temperature, suggests that an easy way to increase efficiency would be to change the temperature of the exhaust gas being treated.
A rig accelerates a load of 200000 lbf from zero to 60 ft/min in 5 seconds. compute the load shown on the hook load indicator.
Two wooden members of uniform rectangular cross section of sides a = 100 mm and b = 60 mm are joined by a simple glued joint as shown. knowing that the ultimate stress of the joint are 1.26 MPa in tension and 1.50 MPA in shear and that P= 6kN, determ..
The pressure gage on an airplane flying overhead indicates that the atmospheric pressure at that point is 9.7 psia and that the air temperature is 42 deg. Fahrenheit. Assume a linear decrease of temperature with elevation
A 10 m long built-up beam is to be fabricated from a universal section beam (UB) and two 'C' channel sections (as indicated). The beams are joined by bolts, with the allowable shear load in each bolt being 12 kN.
At a plant making MSG (monosodium glutamate) for use inAsian cooking the waste stream discharged to a nearby streamcontains 100 mg of glutamic acid(C5H9O4N) per liter
What is the diameter of a circular concrete column needed to support a load of 300,000 pounds with a factor of safety of 2. Round the diameter up to the whole inch. The concrete ultimate strength is 3000 lb/in^2.
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