1. The University of Texas at Austin Spring 2017
CAEE Department, Architectural Engineering Program
Course: Building Energy Management Systems
Instructor: Dr. Atila Novoselac
ECJ, 5.430
Office phone: (512)
Office Hours:
Tuesday and Thursday 11:00 a.m. – 12:00 p.m.
Contacting me
Web site not operational yet
Office – come see me, come see me, come see me,
Call me. Fax me.
me if youmust. Fine for quick answers, to let me know that you are going to miss a class

2. Lecture Objectives: Discuss syllabus Describe course scope
Introduce course themes
Address your concerns
Start with review

3. Introduce yourself Name Background Academic program
Interest and motivation for this course

4. Building Energy Management Systems
Comparison to HVAC Design course
HVAC Design focus on system design
This course:
Focus on large buildings building energy systems
More analyses based than just design
More independent project
Geared towards grad students

5. Course Objectives:
Learn about advanced building energy and environmental control systems.
Obtain knowledge about district cooling and heating systems.
Gain the skills and tools necessary to evaluate integration of sustainable energy production systems to a given building site.
Study application of combined heat and power systems in a specific building or group of buildings.
Conduct thermal, hydraulic and economic modeling of integrated building energy systems for planning and design

6. Prerequisites
Graduate students in CAEE, or other engineering fields. Student should have at least one Fluid Dynamics course and at least one Thermodynamics course.

7. Reading Assignment
Kuehn, T.H.; Ramsey, J.W.; Threlkeld, J.L Thermal Environmental Engineering (3rd Edition) Prentice Hall ISBN:
Taylor, S., P. Dupont, B. Jones, T. Hartman and M. Hydeman Chilled water plant design guide. San Francisco: Pacific Gas & Electric Company.
ASHRAE ASHRAE Handbook HVAC Systems and Equipment. Atlanta: American Society of Heating, Refrigerating, and Air-Conditioning Engineers.
ASHRAE Handbook Fundamentals. Atlanta: American Society of Heating, Refrigerating, and Air-Conditioning Engineers.
Handouts
Journal papers

8. Topics 2. Building ventilation heat recovery systems 1 wks
1. Class intro and HVAC systems review wks
2. Building ventilation heat recovery systems 1 wks
3. Thermal (solar and waste heat) powered desiccant systems 1.5 wk
4. Centralized (compressor and sorption based) cooling systems 3 wks
5. Centralized heating systems wk
6. District heating and cooling distribution systems 1 wk
7. Geothermal and low temperature buildings systems 1 wk
8. Combined cooling heat and power systems wks
9. Systems integration and control wk
Priorities
HVAC first
Lighting Second
Electrical
Plumbing and Noise control - important, but we don’t have time
New professors

9. Grading Test 30% Homework Assignments 35%
Final Project & Presentation 30%
Classroom Participation 5%
100%
Quizzes – 9 of them – every Wednesday (unless otherwise noted)
Midterm October 16th, Wednsday
Project
Homework (every week or two) – if you do the homework and come to class –
Participation – 5% internet resources, completing homework assignment, participating in class discussions, coming to see me, fieldtrips and guest speakers
Final Exam – sorry about the time

10. Grading
> 93 A
90-93 A-
86-90 B+
83-86 B
80-83 B-
< 80 C-, C, C+

11. Course Website All course information:
Your grades and progress on Blackboard
Look at assignments and handout sections
Class notes posted in the morning before the class

12. Questions ?

13. Review – Example problems
Thermodynamics (cycles)
Heat pump example
Psychrometrics:
Swimming pool dehumidification
Focus on various operation conditions (not just design condition)

14. Heat pump example A recreation center Heat Pump Ice Rink Swimming pool
Condenser
Evaporator
85-89oF
30oF
Consumes heat energy
Rejects heat energy
Electric power
for a compressor

15. Ice Rinks
Energy flow

16. Swimming pools
Energy flow

17. Challenges for this problem
Circulating fluid
Adjustment of evaporation and condensation temperatures
Adjustment of capacity for design condition
Control of capacity for non design conditions
Need to study load profiles
Design sophisticated control
Provide backup system

18. Example of capacity profile (building cooling demand)

19. Psychrometric Chart Need two quantities for a state point
Can get all other quantities from a state point
Can do all calculations without a chart
Often require iteration
Many “digital” psychrometric charts available
Can make your own
Best source is ASHRAE fundamentals (Chapter 6)
Or electronic version at:

21. Connection between W and Pw (W humidity ratio – Pw water partial pressure)
PV = mRT (Ideal Gas Law )
P = Pw + Pa
R = gas constant
P = pressure
V = volume
T = absolute temperature
W = humidity ratio
Subscripts: w is water vapor, a is dry air

22. Swimming pool energy and mass balance

23. Evaporation Heat loss by evaporation: hm
Tpool
Tair
pool
W s W ≈ hm Ws
Tpool
Wair
pool
Depends on the air speed and even
more on the condition of the water surface
(people splashing in the water)
Further analysis can be conducted in the psychrometric chart

24. Process in AHUs
Example AHUs for swimming pools
MENERGA ThermoCond 19

25. Swimming pool heating

26. Dehumidification using outside air in Winter and Summer

27. More advance control
MENERGA
ThermoCond 29

28. Dehumidification using outside air in winter
Condenser in the air stream
Evaporator
Compressor of
the heat pump
Condenser in the swimming pool

29. Recirculation of air with dehumidification
catalog