HW_12_Solution

HW_12_Solution - Solution of Homework Assignment 12 1. 2....

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Solution of Homework Assignment 12 1. 2. Argon gas expands in a turbine. The exit temperature of the argon for a power output of 250 kW is to be determined. Assumptions 1 This is a steady-flow process since there is no change with time. 2 Potential energy changes are negligible. 3 The device is adiabatic and thus heat transfer is negligible. 4 Argon is an ideal gas with constant
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
specific heats. Properties The gas constant of Ar is R = 0.2081 kPa.m 3 /kg.K. The constant pressure specific heat of Ar is c p = 0.5203 kJ/kg· C (Table A-2a) Analysis There is only one inlet and one exit, and thus m m m 1 2 . The inlet specific volume of argon and its mass flow rate are     /kg m 0.185 kPa 900 K 800 K /kg m kPa 0.2081 3 3 1 1 1 P RT v Thus,     s kg 2.7 m/s 100 m 0.005 /kg m 0.185 1 1 2 3 1 1 1 / V A m v We take the turbine as the system, which is a control volume since mass crosses the boundary. The energy balance for this steady-flow system can be
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

HW_12_Solution - Solution of Homework Assignment 12 1. 2....

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online