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A 500 MW coal-fired power plant is burning coal with a heating value of 12,000 Btu/lb. The coal contains 2.0% sulphur. The plant has a thermal efficiency of 38%, and uses an air/fuel ratio of 14:1 (mass basis). Calculate (a) the coal firing rate in lb/hr, (b) the fuel gas flow rate in scfm, and (c) the SO2 removal efficiency needed to meet a standard of 1.4 lb/MWh gross electrical energy output.
A gas turbine receives a mixture having the following molar analysis: 10% CO2, 19% H2O, 71% N2 at 720 K, 0.35 MPa and a volumetric flow rate of 3.2 m3 /s. The mixture exits the turbine at 380 K, 0.11 MPa. For adiabatic operation with negligible kinet..
A volcano has erupted, spewing stones, steam, and ash several thousand feet into the atmosphere. After some time, the particles begin to settle to the ground. Consider a nearly spherical ash particle that is 50 microns in diameter, falling in air who..
the water level in a sealed tank is 26 m above the ground. the pressure in the air space above the water is 0.25 mpa
plot a curve of the specific exergy of 1 kg of a substance that has a constant specific heat of 1 kjkg-k over the
in a 1-shell and 2-tube heat exchanger cold water with inlet temperature of 20 degree c is heated by hot water supplied
a pistoncylinder arrangement is filled with helium gas. the gas is compressed with a polytropic process with nk. the
a vertical cylinder containing air is fitted with a piston of 68lbm and cross sectional area of 35in2. the ambient
the bocks sits at rest on the sloping plane. the plane exerts two components of force on the block. the normal
nitrogen gas is compressed from pressure 80kpa and temperature 27degrees celsius to pressure 480kpa by a 10kw
a tank is filled with 8 gallon of brine in which 2 lb of salt is dissolved. brine having 3 lb of salt per gallon enters
with well illustrated diagrams show how the microstructure of a typical metallic material would change during
assuming there are both a pressure gage and a manometer attached to a gas tank which has a pressure lower than patm. if
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