me 476: 2 nd law analysis of engineering systems spring 2008 derek baker

ME 476: ME 476: 22ndnd Law Analysis of Law Analysis of

Engineering SystemsEngineering Systems

Spring 2008

Derek Baker

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

This Week’s Schedule

Today: Overview of Classo Gradingo Assignmentso Structure

Thursday:o Class Policieso Begin Review of Non-Reacting Energy Processes

(Thermo I) 25 Şubat (Monday), 17.00: Ethics HW 1 Due 3 Şubat (Monday), 17.00: Ethics HW 2 Due

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

2nd Law Analysis Advanced Thermodynamic Analysis Also Calledo Availability Analysiso Exergy Analysis

Active area of thermodynamics Exergy quantifies part of energy available to do useful

work (i.e., quality of energy)

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Exergy: Pollution, Climate Change, Resources

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

2nd Law Analysis Exergy not conserved. A thermodynamically perfect process

o Is completely reversible • Generates no entropy• Destroys/loses no exergy

o Generates no pollution/global warming gases All real processes destroy exergy, which results in

o Consumption of non-renewable resourceso Pollutiono Global warming

Goals:o Quantify exergy destroyed/lost by real processeso Identify processes that destroy/lose the most exergyo Minimize exergy destruction through improved engineering

Thermal design and optimization

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Topics:

1. Non-Reacting Energy and Exergy Processesa) Energy: Review Thermo Ib) Exergy: Review Thermo IIc) Non-Reacting Mixtures: Review Thermo II and extend

to Exergy

2. Reacting Mixtures: a) Review Thermo IIb) Extend to Exergy

3. Exergy, Heat Transfer and Fluid Flow (Thermal Systems)

4. Economics5. Thermoeconomics6. Optimization

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Grading

20% Homeworko ½ directly related to projecto ½ covers other topics

25% MT1 25% MT2 30% Final

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Grading

20% Homeworko ½ directly related to projecto ½ covers other topics

25% MT1 25% MT2 30% Final

For MTs and Finalo ½ Take-home related to projecto ½ In-class

~ 50+% of grade is based on project!

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Quizzes and Attendance

No Quizzes Attendance taken but not used to calculate final

grade Grading Curve:

o Defined by students with good attendanceo Not effected by students with poor attendance

Students with good attendance given benefit of doubt

You are responsible for all material I cover in class.

If you miss class without an excuse, do not create extra work for me by asking me what you missed

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Project

Develop model of simple gas turbine engine with heat recovery steam generator

Modeling: MathCado Not Excel or MatLabo Will teach MathCad in Class

Reports:o ~ 7 total (4 HW, 2 for MT’s and 1 for Final) 1 every 2

weekso ~ 2 pages each + methodologyo Table summarizing resultso Graph of resultso ~ 1 page of interpretationo Methodology

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Parts to Project

1. Non-reacting Energy Model

2. Non-reacting exergy model

3. Add water injection before combustion (psychrometrics): Energy and Exergy

4. Combustion + Global Warming

5. Pollution: NOx generation

6. Heat recovery steam generator

7. Economics

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Parts to Project

1. Non-reacting Energy Model

2. Non-reacting exergy model

3. Add water injection before combustion (psychrometrics): Energy and Exergy

4. Combustion + Global Warming

5. Pollution: NOx generation

6. Heat recovery steam generator

7. Economics

** To do well in this course you must work on project over whole semester!**

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Prior Knowledge Assume you knowo Word, Excel (for graphing and tables)o Can answer individual questions

Assume you know but will review main ideas in classo ME 203, Thermo o ME 204, Thermo IIo These classes are Prereqs!

Assume you do not know and will cover in class:o MathCado Economicso Heat Transfero Fluid Mechanics

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

Selection Criteria

If class fills-up…. Attendance on Thursday Cumulative GPA Complete Ethics HW1 by Monday

ME 476 2nd Law Analysis Orta Doğu Teknik Üniversitesi

2nd Law Analysis of Engineering Systems

Questions?????