| Overall Rating | Gold - expired |
|---|---|
| Overall Score | 71.75 |
| Liaison | Cindy Shea |
| Submission Date | July 24, 2017 |
| Executive Letter | Download |
University of North Carolina at Chapel Hill
OP-5: Building Energy Consumption
| Status | Score | Responsible Party |
|---|---|---|
|
2.91 / 6.00 |
Cindy
Register Assist Director of Engineering Services Engineering Services |
Figures needed to determine total building energy consumption:
| Performance Year | Baseline Year | |
| Grid-purchased electricity | 1,175,638 MMBtu | 813,896 MMBtu |
| Electricity from on-site renewables | 127 MMBtu | 0 MMBtu |
| District steam/hot water (sourced from offsite) | 0 MMBtu | 0 MMBtu |
| Energy from all other sources (e.g., natural gas, fuel oil, propane/LPG, district chilled water, coal/coke, biomass) | 2,363,623 MMBtu | 2,598,665 MMBtu |
| Total | 3,539,388 MMBtu | 3,412,561 MMBtu |
Start and end dates of the performance year and baseline year (or 3-year periods):
| Start Date | End Date | |
| Performance Year | Jan. 1, 2015 | Dec. 31, 2015 |
| Baseline Year | Jan. 1, 2003 | Dec. 31, 2003 |
A brief description of when and why the building energy consumption baseline was adopted (e.g. in sustainability plans and policies or in the context of other reporting obligations):
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 by 2015 relative to a FY 2003 baseline
Gross floor area of building space:
| Performance Year | Baseline Year | |
| Gross floor area of building space | 18,943,498 Gross square feet | 13,477,719 Gross square feet |
Source-site ratio for grid-purchased electricity:
Total building energy consumption per unit of floor area:
| Performance Year | Baseline Year | |
| Site energy | 0.19 MMBtu per square foot | 0.25 MMBtu per square foot |
| Source energy | 0.32 MMBtu per square foot | 0.38 MMBtu per square foot |
Percentage reduction in total building energy consumption (source energy) per unit of floor area from baseline:
Degree days, performance year (base 65 °F / 18 °C):
| Degree days (see help icon above) | |
| Heating degree days | 3,148 Degree-Days (°F) |
| Cooling degree days | 1,727 Degree-Days (°F) |
Floor area of energy intensive space, performance year:
| Floor Area | |
| Laboratory space | 2,768,221 Square feet |
| Healthcare space | 262,750 Square feet |
| Other energy intensive space |
EUI-adjusted floor area, performance year:
Building energy consumption (site energy) per unit of EUI-adjusted floor area per degree day, performance year:
Documentation (e.g. spreadsheet or utility records) to support the performance year energy consumption figures reported above:
A brief description of the institution's initiatives to shift individual attitudes and practices in regard to energy efficiency (e.g. outreach and education efforts):
A brief description of energy use standards and controls employed by the institution (e.g. building temperature standards, occupancy and vacancy sensors):
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 Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies 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 and office lighting.
A brief description of passive solar heating, geothermal systems, and related strategies 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 co-generation employed by the institution, e.g. combined heat and power (CHP):
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 the institution's initiatives to replace energy-consuming appliances, equipment and systems with high efficiency alternatives (e.g. building re-commissioning or retrofit programs):
Extensive building retrocommissioning program in effect in more than 10 million GSF of space.
The website URL where information about the programs or initiatives is available:
Additional documentation to support the submission:
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.