1. Final project presentations
on December 9th
8 am
Same Classroom
Send me tee power point file latest at 7:45 am

2. Final presentation slides format
Introduction of the problem: 1-2 slides
Methodology (model description): 1-2 slides
Results: 3-5 Slides
Summary (findings): 1 Slide
Presentation Time: 5 minutes (sharply)
2 minutes for questions
Upload slides before the class !

3. How to evaluate the whole building simulation tools
Two 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

4. Testing the Accuracy of Energy Simulations Comparison with measured data
Cranfield test rooms (from Lomas et al 1994a)

5. BESTEST Building Energy Simulation TEST
System of tests (~ 40 cases)
- Each test emphasizes certain phenomena like
external (internal) convection, radiation, ground contact
Simple geometry
Mountain climate
COMPARE THE RESULTS

6. Example of best test comparison

7. Data Driven Modeling Empirical model For average year use TMY2
Load vs. dry bulb temperature
Measured for a building in Syracuse, NY
Model
For average year use TMY2
=835890ton hour = Btu

8. Advance Energy Modeling with coupled energy and airflow Example: Night Cooling/Hybrid Ventilation
The IONICA Office Building, Cambridge, UK

9. Night Cooling/Hybrid Ventilation:
Requires combined Energy and airflow modeling

10. Night Cooling/Hybrid Ventilation: The IONICA Office Building, Cambridge, UK

11. Available software Which software to use:
- Depends on project requirements
- If you have a choice: the one which passed BETEST
Be ready to conduct additional analysis based on your modeling skills

12. Structure of All ES programs
Graphical User
Interface
(GUI)
Solver
Interface for
input data
Interface for result
presentation
Preprocessor
ASCI
file
Preprocessor
Engine

13. Matlab vs. Scilab http://www.scilab.org/ Many other free versions:
Python …

14. THERM Two-Dimensional Building Heat-Transfer Modeling https://windows
Thermal bridge analysis
Window performance analysis

15. WUFI http://web.ornl.gov/sci/buildings/tools/wufi/
Heat and moisture analysis in building structural components

16. 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.