The expansion phase of a simplified diesel cycle is simulated by an air-filledpiston-cylinder system, as shown in the figure. A servo-actuator attached to thepiston controls the pressure. The air first undergoes a constant pressureexpansion followed by a polytropic expansion (with n=1.4). The ratio of finalspecific volume to initial specific volume, rex, is rex = V3/v1.Initially (state 1) the temperature is T1 = 682 °C and the specific volume is v1 =Piston0.04135 m/kg. Heat is transferred to the air during the constant pressureprocess, 192, and the air temperature increases to T2 = 2475 °C (state 2). Duringthe polytropic expansion process the volume is increased to meet the designexpansion ratio of rex = 20.Treat air as an ideal gas.a) Determine the initial pressure, P1.b) Determine the pressure and specific volume at state 2, P2 and v2, respectively.c) Determine the specific volume, V3, pressure, Ps, and temperature, T3, at the end of thepolytropic expansion.

Given: The ratio of the final specific volume to the initial specific volume is, rex=20=v3v1. The…

The expansion phase of a simplified diesel cycle is simulated by an air-filled piston-cylinder system, as shown in the figure. A servo-actuator attached to the piston controls the pressure. The air first undergoes a constant pressure expansion followed by a polytropic expansion (with n=1.4). The ratio of final specific volume to initial specific volume, res, is rex = Vs/V1. Initially (state 1) the temperature is T1 = 682 °C and the specific volume is vi = 0.04135 m/kg. Heat is transferred to the air during the constant pressure process, 192, and the air temperature increases to T; = 2475 °C (state 2). During the polytropic expansion process the volume is increased to meet the design expansion ratio of rex = 20. Piston Treat air as an ideal gas. a) Determine the initial pressure, P.. b) Determine the pressure and specific volume at state 2, P2 and v2, respectively. c) Determine the specific volume, Vs, pressure, Ps, and temperature, T3, at the end of the polytropic expansion.

The expansion phase of a simplified diesel cycle is simulated by an air-filled piston-cylinder system, as shown in the figure. A servo-actuator attached to the piston controls the pressure. The air first undergoes a constant pressure expansion followed by a polytropic expansion (with n=1.4). The ratio of final specific volume to initial specific volume, res, is rex = Vs/V1. Initially (state 1) the temperature is T1 = 682 °C and the specific volume is vi = 0.04135 m/kg. Heat is transferred to the air during the constant pressure process, 192, and the air temperature increases to T; = 2475 °C (state 2). During the polytropic expansion process the volume is increased to meet the design expansion ratio of rex = 20. Piston Treat air as an ideal gas. a) Determine the initial pressure, P.. b) Determine the pressure and specific volume at state 2, P2 and v2, respectively. c) Determine the specific volume, Vs, pressure, Ps, and temperature, T3, at the end of the polytropic expansion.

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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