Announcement about the final project presentations:

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Announcement about the final project
presentations

• Thursday 800 1045 am
• 16 presentations
• 5 minutes each 2 minutes for QA
• PowerPoint
• Upload the file before the class
• Approximately 5-6 slides (a minute per slide)
• Problem introduction
• Model development - specific problem
• Results
• Results
• Discussion / Summary

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Presenter list(will send you by email today)
Thursday 800 am ..

• Thursday 930 am
• ..

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Lecture Objectives

• Moisture transport
• Point out similarity with heat transfer
• Introduce the process and modeling software
• Finalize discussion about energy modeling
  Application
• Accuracy
• Use in LEED certification process
• Course summary and Course evaluation

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Moisture related problems
5
Moisture transport - fundamentals
However, you should be very carful how you use
vapor barrier ! Theory application (on the
whiteboard)
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Moisture transport (WUFI)

• http//www.wufi.de/index_e.html

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Moisture transfer software

• WUFI
• http//web.ornl.gov/sci/ees/etsd/btric/wufi/softwa
  re.shtml

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List of energy simulation tools

• Office of Energy Efficiency Renewable Energy
  (EERE)
• http//energy.gov/eere/efficiency
• Building Energy Software Tools Directory
• http//apps1.eere.energy.gov/buildings/tools_direc
  tory/subjects.cfm/pagenamesubjects/pagename_menu
  whole_building_analysis/pagename_submenuenergy_si
  mulation

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Your modeling in

• Excel
• MATLAB
• Scilab
• http//www.scilab.org/
• Many other
• Mathematica
• http//www.wolfram.com/mathematica/
• Mathcad
• http//www.ptc.com/product/mathcad/
• Python
• http//www.python.org/psf/
• EES
• http//www.fchart.com/ees/
• .

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What are the reasons for energy simulations?

• 1) Building design improvement
• 2) System Development
• 3) Economic benefits
• 4) Budget planning

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1) Energy Modeling for LEED Projects

• The methodology described in ASHRAE 90.12004
  (Appendix G), California Title 242005, and
  Oregon Energy Code 2005 involves the generation
  of two energy models
• one representing a baseline minimum-standard
  building and the
• other representing the proposed building with all
  its designed energy enhancements.
• ASHRAE Standard 90.1 Energy Standard for
  Buildings Except Low-Rise Residential Buildings
• posted in the course handouts, also UT library
  has all ASHRAE and ANSI standards
  http//www.lib.utexas.edu/indexes/titles.php?letA
  
• Relevant LEED Documentation
• ttp//www.usgbc.org/ShowFile.aspx?DocumentID7795
• Software List http//www.usgbc.org/ShowFile.aspx?D
  ocumentID3478

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DOE reference building that satisfy ASHRAE 90.1

• Sixteen climate zones
• Sixteen building types
• http//www1.eere.energy.gov/buildings/commercial_i
  nitiative/reference_buildings.html
• Models already built for use in EnergyPlus

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2) System development

• Example facade design tool

THERM heat thermal bridge analysis
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3) Economic benefitsLife Cycle Cost Analysis
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Budget planning for existing buildings

• 1) Building design improvement
• 2) System Development
• 3) Economic benefits
• 4) Budget planning

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Empirical model
Load vs. dry bulb temperature Measured for a
building in Syracuse, NY
Model
For average year use TMY2
835890ton hour 10.031 106 Btu
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Building modeling software

Very powerful tool
We need sophisticated users more than
sophisticated software
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How to get more info about software (any software)

• Software documentation
• http//apps1.eere.energy.gov/buildings/energyplus/
  energyplus_documentation.cfm
• ..
• Forums
• http//lists.onebuilding.org/pipermail/equest-user
  s-onebuilding.org/
• .
• Call developers
• works primarily for non-free software

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Review 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 the 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.