1. Objectives Talk about the final projects Discuss HW2 and HW3 problems
Guest Speaker
Discuss HW2 and HW3 problems

2. Guest Speaker Amanda Berens Energy Steward, Facilities Maintenance
The University of Texas at Austin

3. The goal of this presentation is to inform you of different funding sources and strategies for the entire list of buildings that were included in the LoanSTAR Energy Assessment Report.
The next slide shows the complete list
NEXT SLIDE

4. Energy Utilization Index Projected to 2020
4.3% reduction in weather adjusted EUI from baseline year 2008/9 to 2011/12
Annual MMBTU Savings from 2008/09 to 2019/20 = 542,000 MMBTU/yr, at 2008/09 gsf

5. The “Dirty 30” Annual Energy Use
($1,384,000) Fuel Rate Only
($3,214,000) Fully Burdened
($732,000)
($1,691,000)
($610,000)
($1,436,000)
Data are for Jan 2011 through Dec 2011
THE DIRTY THIRTY>>>>>>
30 buildings consuming 80% of our energy … A large number of these buildings also appear on our high EUI list (only seven do not (PCL, BEL, SZB, HRC, PAI, JON, and FAC).

6. Energy Conservation Measures
Technical
HVAC Scheduling
Hot deck & cold deck resets
Lab ventilation air change reduction
General maintenance
Building optimization
Behavioral
Lights out campaign
UTake Charge Challenge
Lab equipment
Events

7. Overview of Hot/Cold Deck Operation
To Office
Return Air
Cooling Coil
Supply Air
Heating Coil
Hot Deck
Cold Deck
Mixing Box T
Return & OA Air
Separate heating/cooling source, hot & cold air supplied to mixing box, mixing box controlled by space T-stat blends air to serve space.
Hot Deck Reset – If OA is 100F, then HD set point is 75F. If OA is 40F, then HD set point is 120F. Linear relationship between points.
Cold Deck Reset – If space RH is < 57%, then CD set point is 59F. If space RH is > 57%, then CD set point is 55F. Can be on/off or linear relationship.
Reset schedules can be tweaked to provide maximum performance and efficiency! T

8. Problem #1 – Hot Deck Reset Savings
Calculate steam consumption reduction over a year due to hot deck reset adjustments.
Given:
Assume a 10,000 CFM Dual Duct AHU system
Original hot deck temp set point = 120 oF
New hot deck temp set point = 95 oF

9. Building Automation - Hot/Cold Deck Resets

10. Problem #2 – Lab Ventilation Reductions
Calculate the reduction in chilled water consumption when a lab air change rate is reduced from 12 to 6 ACH. 
Given:
Assume 10,000 CFM Dual Duct 100 % OA AHU
Laboratory room volume
Assume 5 labs with 2,000 CFM of supply and exhaust air

11. Problem #2 – Lab Ventilation Reductions
2,000 CFM
1,000 CFM
2,000 CFM of OA
2,000 CFM
400 CFM
400 CFM
600 CFM
600 CFM

12. Problem #3 – Increase lab exhaust capacity
ETC has run out of exhaust capacity.  Based on design drawings and actual condition, how can we adapt the building to provide exhaust for a new research on the 9th floor?
Options:
Reduce hood exhaust rate at existing hoods
Convert exhaust system to VAV
Ductless exhaust system

13. Final Project Assignment
During the following two classes I will introduce more project topics
You will need to define your project till April 4th
Define project groups
Undergraduate students group of 2
Graduate students individual projects
Prepare ½ page proposal and it to me till March 26th
Visit me in my office in-between March 26th and April 4th

14. Design problem 3: problems 8.27 and 8. 28
HW 2
Design problem 3:
problems 8.27 and 8. 28

15. HW 3 Cooling Cycles Problems: 1) Book: 3.1 (page 69),
3) Solve 3. 1 for ammonia,
4) Same like 3.5 for R22 with no intercooler
Book 3.9 (pages 70-71)
Book 3.10 (pages 70-71)
Due date: March 21, 2013