|Submission Date||Dec. 20, 2019|
OP-5: Building Energy Efficiency
|2.80 / 6.00||
Facilities Business Manager
Electricity use, performance year (report kilowatt-hours):
|Imported electricity||5,191,122 Kilowatt-hours||17,712.11 MMBtu|
|Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)||1,416,745 Kilowatt-hours||4,833.93 MMBtu|
Stationary fuels and thermal energy, performance year (report MMBtu):
|Stationary fuels used on-site to generate electricity and/or thermal energy||373,341 MMBtu|
|Imported steam, hot water, and/or chilled water||0 MMBtu|
Total site energy consumption, performance year:
Gross floor area of building space, performance year:
Floor area of energy intensive space, performance year:
|Laboratory space||87,356 Square Feet|
|Healthcare space||0 Square Feet|
|Other energy intensive space||17,843 Square Feet|
EUI-adjusted floor area, performance year:
Degree days, performance year:
|Heating degree days||5,929 Degree-Days (°F)|
|Cooling degree days||999 Degree-Days (°F)|
Total degree days, performance year:
Start and end dates of the performance year (or 3-year period):
|Start date||End date|
|Performance period||July 1, 2018||June 30, 2019|
Total site energy consumption per unit of EUI-adjusted floor area per degree day, performance year:
Electricity use, baseline year (report kWh):
|Imported electricity||28,426,545 Kilowatt-hours||96,991.37 MMBtu|
|Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)||0 Kilowatt-hours||0 MMBtu|
Stationary fuels and thermal energy, baseline year (report MMBtu):
|Stationary fuels used on-site to generate electricity and/or thermal energy||74,787.70 MMBtu|
|Imported steam, hot water, and/or chilled water||150,287 MMBtu|
Total site energy consumption, baseline year:
Gross floor area of building space, baseline year:
Start and end dates of the baseline year (or 3-year period):
|Start date||End date|
|Baseline period||July 1, 2007||June 30, 2008|
A brief description of when and why the energy consumption baseline was adopted:
FY 2008 is used as the baseline for greenhouse gas inventory reporting and is the first year for which we have complete (non-extrapolated) data.
Source-site ratio for imported electricity:
Total energy consumption per unit of floor area:
|Site energy||Source energy|
|Performance year||0.15 MMBtu / GSF||0.16 MMBtu / GSF|
|Baseline year||0.11 MMBtu / GSF||0.18 MMBtu / GSF|
Percentage reduction in total source energy consumption per unit of floor area from baseline:
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:
Since 2014, the Eco Facilitators Program has worked to change attitudes and practices within dorms on campus. Sustainability Interns have done the same in program houses and woodframes, where most upperclass students live.
Wesleyan instituted a very successful energy comfort policy in 2015 that establishes (and restricts) temperature ranges for summer and winter to control energy consumption. We are continually working to gain buy-in on this policy at the individual and group levels.
In Wesleyan's Green Office Certification program, offices are rewarded for adopting energy conserving behaviors, including adhering to the energy comfort policy, not using space heaters, finding low-energy solutions to warm up or cool off, and reduce plug loads through changes in workflow and end-of-day habits.
A brief description of energy use standards and controls employed by the institution:
Wesleyan uses an energy management system and individual boiler controls.
A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:
LEDs are used in the vast majority of outdoor lighting applications and parking lots. Roughly 70% of the indoor spaces have been converted to LEDs with another 17% planned for the next two years. The larger buildings on campus (e.g. Freeman, Usdan, Olin, Hall Atwater, Film, 291 Main) use advanced lighting control strategies to maximize savings.
A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:
There is a geothermal system supplying two prototype senior houses with heating and cooling.
A brief description of co-generation employed by the institution:
Wesleyan operates two natural gas reciprocating engines (2.4 MW and 676 kW), which power over 80% of campus with electricity and heat. Wesleyan currently sells all RECs for energy generated by the cogeneration plant.
A brief description of the institution's initiatives to replace energy-consuming appliances, equipment, and systems with high efficiency alternatives:
Since 2010, Wesleyan has completed 12 phases of campus wide energy conservation projects. In addition to the standard conservation and efficiency improvement measures of lighting, (including LEDs) motors/pumps, VFD’s and expansion of the Energy Management system, work has included the complete replacement of central HVAC systems.
To date, approximately $18 million has been invested, with nearly $5 million received in the form of incentives and grants. In response, peak electrical consumption has been reduced by 1.4 MW (from 5.2 MW in 2005 to 3.8 MW in 2013) and oil consumption has declined by 300,000 gallons. In 2012, the university commenced a retro-commissioning effort for buildings with HVAC/BAS systems that are 10± years old. This effort is expected to continue for approximately 3 more years.
Website URL where information about the institution’s energy conservation and efficiency program is available:
Additional documentation to support the submission:
Between our original submission and current submission, Wesleyan added a second gas cogeneration unit and solar PV capacity, drastically reducing our purchased electricity consumption.
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.