Determine isentropic efficiency and exergetic efficiency
Hydrogen at 25 bar, 450°C enters an adiabatic turbine and expands to 2 bar, 160°C with a mass flow rate of 0.2 kg/s. For a dead state of To= 25°C, Po = 1 atm determine the isentropic efficiency and the exergetic efficiency.
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A helicopter moves in such a way that its position at any time is described by the horizontal and vertical equations x = 5t + 12t2 and y = 10 + 2t + 6t2 , where x and y are in meters and t is in seconds. (a) What is the initial position of the hel
Determine the (a) work in kJ, (b) the change in exergy of the air in kJ, and (c) the amount of exergy destroyed, in kJ. Kinetic and potential energy effects can be ignored and the dead state is To= 20°C, Po =100 kPa.
Elaine provides more than half of the support for her son James, who does NOT live with her. James is 26 and is a full-time law student. He earns $2,000 from a part-time job.
On a snowy day with the temperature near the freezing point, the coefficient of static friction between a car's tires and an icy road is 0.08. What is the maximum incline that this four-wheel-drive vehicle can climb with zero acceleration?
Hydrogen at 25 bar, 450°C enters an adiabatic turbine and expands to 2 bar, 160°C with a mass flow rate of 0.2 kg/s. For a dead state of To= 25°C, Po = 1 atm.
Saul Cervantes has just purchased some equipment for his landscaping business. For this equipment he must pay the following amounts at the end of each of the next five years: $12,823, $11,146, $10,844, $11,681, and $10,979.
Calculate stoichiometric A/F ratiop of benzene (c6H6). in an actual combustion of benzene the air'fule ratio was 12/1. calculate the analysis of the wet products of combustion.
At the beginning of the year, Keller Company's liabilities equal $60,000. During the year, assets increase by $80,000. and at year end assets equal $180,00.
Calculate effective annual interest rate (EAR) for the following investments. A bank CD that pays 8.16 percent compounded quarterly. Calculate effective annual interest rate (EAR)?
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