Lectures 31-33

Lectures 31-33 - Lecture 31: energy conservation from...

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

View Full Document Right Arrow Icon
Lecture 31: energy conservation from thermodynamic perspectives 4/7/2008 ME203-002 Objectives: Energy conservation in the context of thermodynamics 1. understand the energy conservation equation in open system 22 11 (1 / 2 ) / 2 ) input output NN CV CV CV i i i i o o o o io dE QW m h V g z m h V g z dt == =−+ + +− + + ∑∑ & & && - what is the meaning of each term in the equation - what is the sign convention for Q and W? Example: Superheated vapor enters a nozzle shown below. The inlet conditions are: P 1 =40 bar, T 1 =400C, and u 1 = 10 m/s. The outlet conditions are: P 2 =15 bar and u 2 =665 m/s. Given that the mass flowrate is 2kg/s, compute the exit area. Homework: Thermodynamic book 4.19 and 4.23 (due on Apr 14) Required reading for this lecture : T4.1-4.5 Suggest reading for next lecture: T4.6-4.10 [ Reminder: Midterm 3 is scheduled on Apr 9 ] 1 2
Background image of page 1

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

View Full DocumentRight Arrow Icon
Lecture 32: Midterm 3 4/9/2008 ME203-002
Background image of page 2
Lecture 33: energy conservation from thermodynamic perspectives: II 4/11/2008 ME203-002 Objectives: Energy conservation in the context of thermodynamics 1.
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

Lectures 31-33 - Lecture 31: energy conservation from...

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