The University of Texas at Austin Fall 2013 CAEE Department, Architectural Engineering Program Course : Energy Simula

1. The University of Texas at Austin Fall 2013 CAEE Department, Architectural Engineering Program Course: Energy Simulation in Building Design Instructor: Dr. Atila Novoselac ECJ, 5.430 Office (512) 475-8175 e-mail: atila@mail.utexas.edu http://www.ce.utexas.edu/prof/Novoselac Office Hours: Tuesday and Thursday 11:00 a.m. – 12:00 p.m.

2. Lecture Objectives: • Discuss syllabus • Describe course scope • Introduce course themes • Address your concerns • Heat transfer review

3. Introduce yourself • Name • Background • Academic program • Graduate/undergraduate or auditing

4. Motivation for learning about Energy Simulation in Building Design Buildings: • Responsible for ~40% of total energy consumption in U.S. • Affect the CO2 emission • Building energy systems with the building envelope affect: • Energy consumption – operation cost • First cost – capital cost • Thermal comfort and IAQ Energy analysis for • Optimum balance between operational and capital cost

5. Motivation: Recognize inaccuracy in energy related technology statements

6. What do you think about this statement? In the article an advertiser claim 30% saving on electric bill.

7. Energy consumption in Austin’s residential house A well-insulated attic in Austin will only comprise 10% - 15% of the sensible Cooling and Heating load.

8. Energy target value for a new house in AustinNew single family 2262 sf, 2-story home

9. How about this statements? • http://alivestructures.com/FAQ/greenroof_faq/39 • http://smallbiztrends.com/2012/03/the-benefits-and-controversy-of-white-roofs.html • ……

10. Student interested in Sustainable Design LEED - Leadership in Energy and Environmental Design 1) LEED Certification require that building has analysis related to energy performance 2) All government buildings require energy analysis -all new UT buildings require energy analysis

11. What is Energy Analysis ? Samsung R&B Building UT Solar Decathlon House 2007

12. Example of energy modeling for building optimization Design iterations to optimize shape and energy use Solutions: • passive shadings • positions and area of windows • insulation value • tightly sealed envelope • high-performance window • position of solar collectors Architectural models Energy-simulation models Design iterations

13. Example of Solar Analysis for thePike Powers Commercialization Lab Solar panels

14. Heat and mass transfer in buildings

15. Energy simulation software Simulation Software Garbage IN Garbage OUT

16. Course Objectives 1. Identify basic building elements which affect building energy consumption and analyze the performance of these elements using energy conservation models. 2. Analyze the physics behind various numerical tools used for solving different heat transfer problems in building elements. 3. Use basic numerical methods for solving systems of linear and nonlinear equations. 4. Conduct building energy analysis using comprehensive computer simulation tools. 5. Evaluate performance of building envelope and environmental systems considering energy consumption. 6. Perform parametric analysis to evaluate the effects of design choices and operational strategies of building systems on building energy use. 7. Use building simulations in life-cycle cost analyses for selection of energy-efficient building components.

17. Prerequisites • ARE 346N Building Environmental Systems • ME 320 Thermodynamics or similar courses Knowledge of the following is beneficial: - Heat transfer - Numerical methods - Programming

18. Textbook Energy Simulation in Building Design J A Clarke, 2002 (2nd Edn)

19. Textbook References: 1) 2001 ASHRAE Handbook: Fundamentals. IP or SI edition, hard copy or CD 2) Numerical Heat Transfer and Fluid Flow S V Patankar, 1980 3) Solar Engineering of Thermal Processes John A. Duffie, William A. Beckman, 1991 4) Design of Thermal Systems W. F. Stoecker, 1998

20. Handouts • Copies of appropriate book sections • Book from the reference list • I will mark important sections • Disadvantage - different nomenclature and terminology • I will point-out terms nomenclature and terminology differences • Journal papers • Related to application of energy simulation programs

21. Other books for reading • ASHRAE Fundamentals • Great and very complete reference about HVAC and heat transfer • Heating Ventilating and Air Conditioning Mcqusiton, Spittler, Parker (2000) • Basic knowledge about HVAC systems • Fundamentals of Heat and Mass Transfer Incropera, Witt, (2001) • Excellent reference and textbook about fundamental of Heat transfer

22. Energy simulation (ES) software • We are going to learn to evaluate: • importance of input data • effects of simplification and assumptions • accuracy of results for each ES program • We are going to talk about several most commonly used ES programs • Concentrate on eQUEST and EnergyPlus – for projects and homework's http://www.doe2.com/equest/ , http://apps1.eere.energy.gov/buildings/energyplus/

24. Why eQUEST software • It is free - you can take it to your future company • It has user-friendly interface • It has built in functions for economic analyses • It is based on well tested DOE2 ES program There are certain limitations limited number of HVAC system

25. Energy Plus Open Studio BEopt

26. Topics 1. Course Introduction and Background 0.5 wk 2. Fundamentals of energy mass transfer 1.5 wks 3. Thermal analysis of building components 2 wk 4. Numerical methods 2 wks 5. Energy simulation tools 1 wk 6. Introduction to DOE2(eQUEST) and Energy+ 1 wk 7. Building envelope analyses 2 wks 8. HVAC System analyses 2 wks 9. Parametric Analyses 2 wks

28. Grading Test 25% Homework Assignments 30% Midterm Project 10% Final Project & Presentation 30% Classroom Participation 5% 100%

29. Grading Undergraduate Graduate > 90 A > 93 A 80-90 B 90-93 A- 70-80 C 86-90 B+ 60-70 D 83-86 B < 60 F 80-83 B- < 80 C-, C, C+

30. Participation 5% • How to get participation points • Come to class • Participate in class • Come see me in my office

31. Midterm Exam 25% • October 29 (will be confirmed) • Problems based on topics cover in first part of the course

32. Homework 30% Total 3 (or four) • HW1, two parts Solar radiation problem • HW2 , HW3 Problems related to building heat transfer modeling

33. Midterm Project 10% • Individual project 1) Use of eQUEST (or EnergyPlus) simulation tool for building envelope analysis • Primary goal is to get familiar with the software 2) You can suggest your own problem - modeling

34. Final Project 30% 1) Use of simulation tool (commercially available or your) for detail energy analysis • Energy analysis of building envelope and HVAC systems • Problems related to your future career • Problems related to your internship 2) Problem related your future job or reserch - You propose • Project seminar

35. Project Topic Examples • Pecan Street Project • Real project – building connected to smart grid • Optimization of • Envelope • HVAC systems • Solar collectors • Facade Thermal Lab at UT SOA • Design and optimization of thermal storage systems

36. Course Website All course information: http://www.ce.utexas.edu/prof/Novoselac/classes/ARE383/ • Your grades and progress on Blackboard • Look at assignments and handout sections • Class notes posted in the morning before the class • PLEASE LET ME KNOW ABOUT ERRORS

37. Units System We will use both SI and IP unit system • Research: SI • HVAC industry including architectural and consulting companies IP First part of the course more SI Second part of the course IP and SI

38. My Issues • Please try to use office hours for questions problems and other reasons for visit • Please don’t use e-mail to ask me questions which require long explanations • Call me or come to see me • I accept suggestions • The more specific the better

39. Questions ?

40. Assignment 0 • Your motivation and expectation • Due on Tuesday

41. Review - Heat transfer • Convection • Conduction • Radiation

42. Example Problem –radiant barrier in attic