Final project presentationThursday 8 10:45 am16 presentations 5 minutes each +2 minutes for Q&A

PowerPointUpload the file before the class

Approximately 5-6 slides (a minute per slide)Problem introduction Model development - specific problemResults Results Discussion / Summary

Presenter list(will send you by email today) Thursday 9:30 am:

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Thursday 8:00 am:..

Lecture Objectives:Finalize discussion about energy modeling ApplicationAccuracyUse in LEED certification process

Course summary and Course evaluation

ES programs(specific)Window / Thermhttp://windows.lbl.gov/software/NFRC/NFRCSim6.3-2010-Cover-Chptr01.pdf

http://apps1.eere.energy.gov/buildings/tools_directory/software.cfm/ID=362/pagename=alpha_list_sub

WUFI-ORNL/IBP

Your models inExcelMATLABScilabhttp://www.scilab.org/

Many other Mathematicahttp://www.wolfram.com/mathematica/Mathcad http://www.ptc.com/product/mathcad/Pythonhttp://www.python.org/psf/EES http://www.fchart.com/ees/.

How to evaluate the whole building simulation toolsTwo options:

Comparison with the experimental data - monitoring- very expensive- feasible only for smaller buildings

2) Comparison with other energy simulation programs- for the same input data - system of numerical experiments - BESTEST

Comparison with measured dataCranfield test rooms (from Lomas et al 1994a)

BESTEST Building Energy Simulation TESTSystem of tests (~ 40 cases) - Each test emphasizes certain phenomena like external (internal) convection, radiation, ground contact Simple geometryMountain climateCOMPARE THE RESULTS

Example of best test comparison

Reasons for energy simulations 1) Building design improvement

2) System development

3) Economic benefits (pay back period)

4) Budget planning (fuel consumption)

1) Energy Modeling for LEED ProjectsThe 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 theother representing the proposed building with all its designed energy enhancements.

ASHRAE Standard 90.1 Energy Standard for Buildings Except Low-Rise Residential Buildingsposted in the course handouts, also UT library has all ASHRAE and ANSI standards http://www.lib.utexas.edu/indexes/titles.php?let=A

Relevant LEED Documentationttp://www.usgbc.org/ShowFile.aspx?DocumentID=7795Software List http://www.usgbc.org/ShowFile.aspx?DocumentID=3478

DOE reference building that satisfy ASHRAE 90.1Sixteen climate zones

Sixteen building types

http://www1.eere.energy.gov/buildings/commercial_initiative/reference_buildings.html

Models already built for use in EnergyPlus

2) System development THERM: heat thermal bridge analysis Example: facade design tool

3) Economic benefitsLife Cycle Cost AnalysisEngineering economics

Energy benefits

Parameters in life cycle cost analysisBeside energy benefits expressed in $,you should consider:

First costMaintenanceOperation lifeChange of the energy cost Interest (inflation)Taxes, Discounts, Rebates, other Government measures

Example Using eQUEST analyze the benefits (energy saving and pay back period) of installing - low-e double glazed window - economizer in the school building in NYC

Reasons for energy simulations System development

Building design improvement

Economic benefits (pay back period)

4) Budget planning (fuel consumption)

Least accurate

Source of inaccuracywhen considering final results Assumptions related to the model Lack of precise input data

Modeling software (tool) limitations

Limitation related to available computational resources

Result interpretations

Building modeling software

Very powerful tool

We need sophisticated users more than sophisticated software

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-users-onebuilding.org/.

Call developers works primarily for non-free software

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. Review Course Objectives

*First is overall theme relevant to everyone2nd also relevant to everyoneexample of mechanical engineer resisting your changeProject manager- knowledge of planning for BES stages4 main areas HVAC, electrical, lighting, plumbingNoise control and acoustics if we have time