Overall Rating	Gold
Overall Score	65.84
Liaison	Morgan Hartman
Submission Date	Dec. 12, 2022

STARS v2.2

University of Nebraska - Lincoln
OP-5: Building Energy Efficiency

Status	Score	Responsible Party
	3.55 / 6.00	Morgan Hartman Recycling Coordinator FMO

"---" indicates that no data was submitted for this field

Part 1. Site energy use per unit of floor area

Performance year energy consumption

Electricity use, performance year (report kilowatt-hours):

	kWh	MMBtu
Imported electricity	154,046,650 Kilowatt-hours	525,607.17 MMBtu
Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)	53,183 Kilowatt-hours	181.46 MMBtu

Stationary fuels and thermal energy, performance year (report MMBtu):

	MMBtu
Stationary fuels used on-site to generate electricity and/or thermal energy	728,982 MMBtu
Imported steam, hot water, and/or chilled water	0 MMBtu

Total site energy consumption, performance year:

1,254,770.63 MMBtu

Performance year building space

Gross floor area of building space, performance year:

14,687,921 Gross square feet

Floor area of energy intensive space, performance year:

	Floor area
Laboratory space	1,441,530 Square feet
Healthcare space	108,428 Square feet
Other energy intensive space	252,703 Square feet

EUI-adjusted floor area, performance year:

18,040,540 Gross square feet

Performance year heating and cooling degree days

Degree days, performance year:

	Degree days
Heating degree days	5,694 Degree-Days (°F)
Cooling degree days	1,275 Degree-Days (°F)

Total degree days, performance year:

6,969 Degree-Days (°F)

Performance period

Start and end dates of the performance year (or 3-year period):

	Start date	End date
Performance period	Jan. 1, 2020	Dec. 31, 2020

Metric used in scoring for Part 1

Total site energy consumption per unit of EUI-adjusted floor area per degree day, performance year:

9.98 Btu / GSF / Degree-Day (°F)

Part 2. Reduction in source energy use per unit of floor area

Baseline year energy consumption

STARS 2.2 requires electricity data in kilowatt-hours (kWh). If a baseline has already been established in a previous version of STARS and the institution wishes to continue using it, the electricity data must be re-entered in kWh. To convert existing electricity figures from MMBtu to kWh, simply multiply by 293.07107 MMBtu/kWh.

Electricity use, baseline year (report kWh):

	kWh	MMBtu
Imported electricity	169,589,741 Kilowatt-hours	578,640.20 MMBtu
Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)	58,672 Kilowatt-hours	200.19 MMBtu

Stationary fuels and thermal energy, baseline year (report MMBtu):

	MMBtu
Stationary fuels used on-site to generate electricity and/or thermal energy	748,976 MMBtu
Imported steam, hot water, and/or chilled water	0 MMBtu

Total site energy consumption, baseline year:

1,327,816.39 MMBtu

Baseline year building space

Gross floor area of building space, baseline year:

13,907,986 Gross square feet

Baseline period

Start and end dates of the baseline year (or 3-year period):

	Start date	End date
Baseline period	Jan. 1, 2017	Dec. 31, 2017

A brief description of when and why the energy consumption baseline was adopted:

We changed the baseline year to one where we have very good data records.

Source energy

Source-site ratio for imported electricity:

Total energy consumption per unit of floor area:

	Site energy	Source energy
Performance year	0.09 MMBtu per square foot	0.16 MMBtu per square foot
Baseline year	0.10 MMBtu per square foot	0.18 MMBtu per square foot

Metric used in scoring for Part 2

Percentage reduction in total source energy consumption per unit of floor area from baseline:

12.13

Optional Fields

Documentation 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:

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A brief description of energy use standards and controls employed by the institution:

The central building operating system operates in all classroom/office/lab buildings.
Where possible (mostly classroom/office) air handlers are turned off at night and on weekends. Otherwise, room thermostats go to a low-energy mode at night and on weekends. Occupancy sensors reduce HVAC use when room is unoccupied, even during normal scheduled hours of operation.
Most lab spaces have occupancy switches. By using the switch, users can reduce ventilation when lab is not occupied.

A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:

New construction has LED lighting. The main university library recently (2019) had all fixtures with 4 ft T8 fluorescent tubes retrofitted with LED tubes. One parking garage is entirely LED, and one gym was recently converted to high-bay LED. Approximately 6 buildings per year are being retrofitted with LED tubes (4 ft T8 size) through an ongoing project. Fluorescent tubes are no longer stocked; all failed tubes are replaced with LEDs.

A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:

One academic building and one housing complex have ground coupled heat pump systems in use for all heating and cooling needs.

A brief description of co-generation employed by the institution:

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A brief description of the institution's initiatives to replace energy-consuming appliances, equipment, and systems with high efficiency alternatives:

Five buildings have heat recovery chillers installed. These either supply chilled water and hot water to the building or supplement that supplied by the campus utility.

Website URL where information about the institution’s energy conservation and efficiency program is available:

https://sustainability.unl.edu/

Additional documentation to support the submission:

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Data source(s) and notes about the submission:

OP 5 performance year is calendar year 2020. Information in PRE5 is based on 2021 data.

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.