Your company would like to build a plant that produces 200 kMTA of fuel-grade ethanol from corn using a dry-milling process. The overall yield is 2.5 gallons of ethanol per bushel of corn. A byproduct of the process is livestock feed produced at 22 pounds per bushel of corn (the livestock feed is valued at $0.05/lb). Assuming the total operating costs for the plant will be $20MM per year, determine the simple payback time and the simple pre-tax return on investment for building the plant.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

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?