A new vehicle propulsion scheme calls for the use of liquid nitrogen as "fuel." The details of the power cycle are not the issue here (in brief, the liquid nitrogen is heated in contact with the atmosphere, pressurized, and expanded through the turbine that drives the vehicle). Calculate the max- imum work that could theoretically be extracted from the liquid nitrogen fuel. During each refueling stop, the driver purchases a Dewar vessel (a bottle) containing 0.05 m of liquid nitrogen at atmospheric pressure. The driver leaves in exchange a used bottle, that is, a bottle contain- ang gaseous N2 at atmospheric pressure and temperature. The proper- ties of nitrogen as saturated liquid at 1 atm are v = 1.24 x 10- m'/kg, h = -121.5 kJ/kg, and s ties of nitrogen at atmospheric temperature and pressure (300 K, 1 atm) are v = 0.49 m'/kg, h = 2.85 kJ/kg K. The corresponding proper- %3D = 172.1 kJ/kg, and s 6.25 kJ/kg K. %3D

A new vehicle propulsion scheme calls for the use of liquid nitrogen as "fuel." The details of the power cycle are not the issue here (in brief, the liquid nitrogen is heated in contact with the atmosphere, pressurized, and expanded through the turbine that drives the vehicle). Calculate the max- imum work that could theoretically be extracted from the liquid nitrogen fuel. During each refueling stop, the driver purchases a Dewar vessel (a bottle) containing 0.05 m of liquid nitrogen at atmospheric pressure. The driver leaves in exchange a used bottle, that is, a bottle contain- ang gaseous N2 at atmospheric pressure and temperature. The proper- ties of nitrogen as saturated liquid at 1 atm are v = 1.24 x 10- m'/kg, h = -121.5 kJ/kg, and s ties of nitrogen at atmospheric temperature and pressure (300 K, 1 atm) are v = 0.49 m'/kg, h = 2.85 kJ/kg K. The corresponding proper- %3D = 172.1 kJ/kg, and s 6.25 kJ/kg K. %3D

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

3.4 A new vehicle propulsion scheme calls for the use of liquid nitrogen as
"fuel." The details of the power cycle are not the issue here (in brief, the
liquid nitrogen is heated in contact with the atmosphere, pressurized, and
expanded through the turbine that drives the vehicle). Calculate the max-
imum work that could theoretically be extracted from the liquid nitrogen
fuel. During each refueling stop, the driver purchases a Dewar vessel
(a bottle) containing 0.05 m3 of liquid nitrogen at atmospheric pressure.
The driver leaves in exchange a used bottle, that is, a bottle contain-
ing gaseous N, at atmospheric pressure and temperature. The proper-
ties of nitrogen as saturated liquid at 1 atm are v = 1.24 x 10- m/kg,
h = -121.5 kJ/kg, and s = 2.85 kJ/kg · K. The corresponding proper-
ties of nitrogen at atmospheric temperature and pressure (300 K, 1 atm)
are v = 0.49 m /kg, h = 172.1 kJ/kg, and s =
6.25 kJ/kg · K.

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