A piston cylinder assembly shown in the figure contains 0.9 kg of air. Initially the piston is resting on the stops and has a temperature of T, = 190°C. The height, h, from the bottom of the cylinder is 1.2 m. The piston has a mass (mp) of 3.6 kg and a diameter (D) of 600 mm. Weights with a total mass of mw are sitting on top of the piston. Heat is added until the temperature reaches T2-260°C at which point the piston just starts to lift off the stops. More heat is then added until the temperature reaches T;= 310°C. Treat air as an ideal gas. Assume Po = 101 kPa. a) Determine the initial pressure P1,of the air. b) Determine the mass of the weights, mw. c) Determine the change in height of the piston from state 1 to state 3 (h3-hi). d) Draw all state points and process lines on a P-V (pressure - volume) diagram. Include labeled constant temperature lines and label the pressure and volume values corresponding to each state point.

A piston cylinder assembly shown in the figure contains 0.9 kg of air. Initially the piston is resting on the stops and has a temperature of T, = 190°C. The height, h, from the bottom of the cylinder is 1.2 m. The piston has a mass (mp) of 3.6 kg and a diameter (D) of 600 mm. Weights with a total mass of mw are sitting on top of the piston. Heat is added until the temperature reaches T2-260°C at which point the piston just starts to lift off the stops. More heat is then added until the temperature reaches T;= 310°C. Treat air as an ideal gas. Assume Po = 101 kPa. a) Determine the initial pressure P1,of the air. b) Determine the mass of the weights, mw. c) Determine the change in height of the piston from state 1 to state 3 (h3-hi). d) Draw all state points and process lines on a P-V (pressure - volume) diagram. Include labeled constant temperature lines and label the pressure and volume values corresponding to each state point.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter3: Transient Heat Conduction

Section: Chapter Questions

Problem 3.37P

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