eml 3100 lec 8a problems

eml 3100 lec 8a problems - Thermodynamics Moving Boundary...

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UNIVERSITY OF FLORIDA Lecture No. 8 1 Thermodynamics Moving Boundary Work-Closed Systems /kg m .71643 0 C 200 kPa 00 3 /kg m 0.60582 vapor Sat. kPa 300 3 2 2 2 3 kPa 300 @ 1 1 = ° = = = = = v v v T P P g kJ 165.9 = - = - = - = = 3 3 1 2 1 2 2 1 out , m kPa 1 kJ 1 /kg m 0.60582) 43 kPa)(0.716 kg)(300 (5 ) ( ) ( v v V V V mP P d P W b P (kPa ) V 300 1 2 5 kg of saturated water vapor in a cylinder is heated at constant pressure (300kPa) until its temperature rises to a specified value(200 deg C). The boundary work done during this process is to be determined. Assumptions The process is quasi-equilibrium. Properties Noting that the pressure remains constant during this process, the specific volumes at the initial and the final states are Analysis The boundary work is determined from its definition to be Discussion The positive sign indicates that work is done by the system (work output). In order to estimate heat transfer to piston cylinder device, we would need to also calculate the change in internal energy using tabular data. Then Q = deltaU+Wmb E = Q – Wother – Wmb = U + KE + PE 0 0 0

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UNIVERSITY OF FLORIDA Lecture No. 8 2 Thermodynamics /lbm ft .1623 3 0.01715 3 . 0
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This note was uploaded on 08/03/2011 for the course EML 3100 taught by Professor Sherif during the Summer '08 term at University of Florida.

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eml 3100 lec 8a problems - Thermodynamics Moving Boundary...

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