Overall Rating Gold - expired
Overall Score 66.39
Liaison Shane Stennes
Submission Date Dec. 15, 2015
Executive Letter Download

STARS v2.0

University of Minnesota, Twin Cities
OP-8: Building Energy Consumption

Status Score Responsible Party
Complete 2.51 / 6.00 August Horner
Sustainability Student Asst
Office of Sustainability
"---" indicates that no data was submitted for this field

Total building energy consumption, all sources (transportation fuels excluded):
Performance Year Baseline Year
Total building energy consumption 3,818,594 MMBtu 4,276,824 MMBtu

Purchased electricity and steam:
Performance Year Baseline Year
Grid-purchased electricity 1,170,676 MMBtu 1,259,994 MMBtu
District steam/hot water 2,484,460 MMBtu 2,843,271 MMBtu

Gross floor area of building space::
Performance Year Baseline Year
Gross floor area 23,135,732 Gross Square Feet 21,636,237 Gross Square Feet

Floor area of energy intensive space, performance year::
Floor Area
Laboratory space 1,994,998 Square Feet
Healthcare space 421,064 Square Feet
Other energy intensive space

Degree days, performance year (base 65 °F)::
Degree days (see help icon above)
Heating degree days 7,599
Cooling degree days 705

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, 2014 June 30, 2015
Baseline Year July 1, 2007 June 30, 2008

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

A brief description of any building temperature standards employed by the institution:

o During building operating hours: 72 degree target, +/- 2 degrees (keep within 68-78 range for buildings with DDC systems)
o During building non-operating hours: temperature range broadened to conserve energy use: 62 degree minimum (winter), 85 degree maximum (summer).

A brief description of any light emitting diode (LED) lighting employed by the institution:

o In the last 3 years we have invested over $5M retro-fitting incandescent and fluorescent lighting fixtures with highly effieicent LED fixtures and bulbs.

A brief description of any occupancy and/or vacancy sensors employed by the institution:

o Occupancy sensors are used extensively around campus to control lighting and ventilation

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:

o Nothing as of now, although there is one proposed for the new Bell Museum

A brief description of any cogeneration technologies employed by the institution:

o $113M CHP Plant is in the building stage to be operational in 2016, which will include a 25MW Turbine powered generator and a steam generator utilizing the waste heat from the turbine.

A brief description of any building recommissioning or retrofit program employed by the institution:

o The Twin Cities campus has an active recommissioning program where we target between 5-10 buildings a year depending on the size and scope of work to be completed. Buildings are selected based on analysis of utilities usage and ends identified on the B3 website. Typical results of recommissioning are between 15-30% savings.

A brief description of any energy metering and management systems employed by the institution:

We use two separate programs to monitor energy on campus that monitor three different utilities, which are Chilled Water, Electricity, and Steam. All of our buildings are metered, however not all of the meters can be remotely read. Most of our buildings have at least one utility that can be remotely read by our programs, while a number have all three.

One of the programs that monitor and gather meter data is our SCADA system, which is used exclusively for electricity. This program stores meter data every 15 minutes for us to be able to use. The other program is our Modbus program, which is used for steam, chilled water, and some overlap for electricity. This program stores meter data every 5 minutes.

We use this meter data in a variety of ways. We use this data to bill our customers on how much energy they use, for trying to find ways to reduce energy usage on campus, and for providing informational data to interested parties through our energy websites (http://facm.umn.edu/energy-management/building-dashboards) and dashboard displays (located in some building lobbies).

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

o We have used “buy-back” programs in the past to encourage researchers to turn-in old refrigerators and replace them with new Energy-Star units. We are exploring a similar program with the -80 Freezers, to encourage the purchase of the new freezers with the highly efficient stirling compressors.

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:

o Steam Trap program to identify and repair/replace faulty steam traps
o We use Fault Detection software in our Building Control system to identify problems with our HVAC, Steam and Chill Water Systems
o We have an extensive metering and submetering system on campus to help isolate and identify energy usage
o It All Adds Up (IAAU) campaign. which is a joint venture between Susainability, Enery, Recycling, etc … encouraging sustainable practices for all students and faculty.

The website URL where information about the institution’s energy conservation and efficiency initiatives is available:

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 and complete the Data Inquiry Form.