Engineering, 05.10.2019 00:20 machapman6594
3. exhaust gas from a chemical process flows at a rate of 8000 acfm from point a at 250 degrees f and 1 atm pressure. it is flows through a circular duct to a fan where the pressure is boosted by 4 inches of water and then flows to an incinerator. fuel gas is burned at a rate of 75 pounds per hour and the temperature of the exhaust gas is 1200 degrees f. assuming both the process exhaust and incinerator exhaust streams have properties similar to air, calculate the enthalpy that has been added by burning the fuel gas. assume that you can recover heat from the incinerator exhaust by purchasing aheat exchanger to cool the gases to 500 degrees f while recovering the useful heat. assuming that such heat is worth $7/million btu, how much money could you save by recovering the heat ($/day)
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Engineering, 04.07.2019 18:10
Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.
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Engineering, 04.07.2019 18:10
Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?
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Engineering, 04.07.2019 18:10
A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.
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Engineering, 04.07.2019 18:10
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
3. exhaust gas from a chemical process flows at a rate of 8000 acfm from point a at 250 degrees f an...
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