| Overall Rating | Gold - expired |
|---|---|
| Overall Score | 70.01 |
| Liaison | Cindy Shea |
| Submission Date | July 18, 2014 |
| Executive Letter | Download |
University of North Carolina at Chapel Hill
OP-8: Building Energy Consumption
| Status | Score | Responsible Party |
|---|---|---|
|
3.50 / 6.00 |
Chris
Martin Director Energy Management |
Total building energy consumption, all sources (transportation fuels excluded):
| Performance Year | Baseline Year | |
| Total building energy consumption | 2,401,525 MMBtu | 2,607,960 MMBtu |
Purchased electricity and steam:
| Performance Year | Baseline Year | |
| Grid-purchased electricity | 1,008,446 MMBtu | 1,466,134 MMBtu |
| District steam/hot water | 1,393,079 MMBtu | 1,141,826 MMBtu |
Gross floor area of building space::
| Performance Year | Baseline Year | |
| Gross floor area | 18,604,230 Gross square feet | 13,477,719 Gross square feet |
Floor area of energy intensive space, performance year::
| Floor Area | |
| Laboratory space | 2,414,764 Square feet |
| Healthcare space | 275,809 Square feet |
| Other energy intensive space |
Degree days, performance year (base 65 °F)::
| Degree days (see help icon above) | |
| Heating degree days | 3,436.20 |
| Cooling degree days | 1,599.90 |
Source-site ratios::
| Source-Site Ratio (see help icon above) | |
| Grid-purchased electricity | 3.14 |
| District steam/hot water | 1.20 |
Start and end dates of the performance year and baseline year (or 3-year periods)::
| Start Date | End Date | |
| Performance Year | July 1, 2012 | June 30, 2013 |
| Baseline Year | July 1, 2002 | June 30, 2003 |
A brief description of when and why the building energy consumption baseline was adopted:
The UNC Chapel Hill energy consumption baseline was adopted to be in alignment with the legislatively mandated Utility Savings Initiative. All state agencies, including universities, are required to reduce their energy consumption by 30% per square foot relative to a FY 2003 baseline.
A brief description of any building temperature standards employed by the institution:
Our centralized Building Automation System (BAS) allows us to program night setback temperatures in many of our buildings. This is done by programming the controllers in a specific building to change their space temperature setpoint at a specific time of day. So, for example, a building with an occupied setpoint of 70 degrees during the day might be allowed to cool down to 65 degrees between 6pm and 6am before the heating system would turn back on. Both the temperature and the time can be remotely adjusted from our centralized energy management center.
A brief description of any light emitting diode (LED) lighting employed by the institution:
LED lighting is used for an increasing number of applications on campus -- outdoor safety/way finding lights, parking decks, loading docks, building wall packs, and - because of a significant recent decrease in price - building corridor lighting.
A brief description of any occupancy and/or vacancy sensors employed by the institution:
Occupancy sensors are used in restrooms, break rooms, conference rooms, and other common areas throughout campus.
A brief description of any passive solar heating employed by the institution:
A brief description of any ground-source heat pumps employed by the institution:
The NC Botanical Garden has 31 geothermal wells, 25 of which are 500 feet deep. The system is used to heat and cool the three-building, LEED Platinum complex.
A brief description of any cogeneration technologies employed by the institution:
UNC operates a 32 MW cogeneration plant, with fluidized bed combustion and flue gas scrubbers, that simultaneously produces both steam- used for heating, humidification, domestic hot water, sterilization, and making distilled water in laboratories—and up to one-third of the campus peak electric load. Compared to standard power plants that produce 1/3 useable energy and 2/3 waste heat, UNC’s combined heat and power plant produces more than 2/3 useable energy and less than 1/3 waste heat.
A brief description of any building recommissioning or retrofit program employed by the institution:
Extensive building retrocommissioning program in effect in approximately 10 million GSF of space.
A brief description of any energy metering and management systems employed by the institution:
Virtually all campus buildings are individually metered for steam, electricity, and chilled water. Real time consumption data in more than 200 buildings is available via an online energy dashboard system.
Our centralized Energy Management Control System (EMCS) enables communication with and control of almost all of the buildings on campus. In addition to sending commands to change setpoints and schedules in a building, the system records status and alarm data from each building. The EMCS center is staffed 6:00am to 10:30pm Monday through Friday and 6:00am to 4:30pm Saturday and Sunday.
A brief description of the institution's program to replace energy-consuming appliances, equipment and systems with high efficiency alternatives:
A brief description of any energy-efficient landscape design initiatives employed by the institution:
A brief description of any vending machine sensors, lightless machines, or LED-lit machines employed by the institution:
A brief description of other energy conservation and efficiency initiatives employed by the institution:
The website URL where information about the institution’s energy conservation and efficiency initiatives is available:
Data source(s) and notes about the submission:
The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution or simply email your inquiry to stars@aashe.org.