| Overall Rating | Silver - expired |
|---|---|
| Overall Score | 50.03 |
| Liaison | Mike Evans |
| Submission Date | May 28, 2019 |
| Executive Letter | Download |
Williams College
OP-5: Building Energy Consumption
| Status | Score | Responsible Party |
|---|---|---|
|
4.36 / 6.00 |
Amy
Johns Director Zilkha Center for Environmental Initiatives |
"---"
indicates that no data was submitted for this field
Part 1
This credit is based on energy inputs from offsite sources and electricity produced by onsite renewables. When the institution purchases one fuel and uses it to produce heat and/or power, you should enter only what is purchased. For example, if the institution purchases natural gas to fuel a CHP system and produce steam and electricity, only the purchased natural gas should be reported.
| Performance Year | Baseline Year | |
| Grid-purchased electricity | 135,823 MMBtu | 139,546 MMBtu |
| Electricity from on-site renewables | 99 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) | 228,959 MMBtu | 261,222 MMBtu |
| Total | 364,881 MMBtu | 400,768 MMBtu |
Start and end dates of the performance year and baseline year (or 3-year periods):
| Start Date | End Date | |
| Performance Year | July 1, 2017 | June 30, 2018 |
| Baseline Year | July 1, 2004 | June 30, 2005 |
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 building energy consumption baseline was chosen because 2005 was immediately prior to the college's first greenhouse gas emissions goals.
Gross floor area of building space:
| Performance Year | Baseline Year | |
| Gross floor area of building space | 2,996,585 Gross square feet | 2,298,096 Gross square feet |
Source-site ratio for grid-purchased electricity:
3.14
Total building energy consumption per unit of floor area:
| Performance Year | Baseline Year | |
| Site energy | 0.12 MMBtu per square foot | 0.17 MMBtu per square foot |
| Source energy | 0.22 MMBtu per square foot | 0.30 MMBtu per square foot |
Percentage reduction in total building energy consumption (source energy) per unit of floor area from baseline:
28.12
Part 2
| Degree days (see help icon above) | |
| Heating degree days | 7,756 Degree-Days (°F) |
| Cooling degree days | 296 Degree-Days (°F) |
Floor area of energy intensive space, performance year:
| Floor Area | |
| Laboratory space | 247,000 Square feet |
| Healthcare space | 13,000 Square feet |
| Other energy intensive space |
EUI-adjusted floor area, performance year:
3,541,292
Gross square feet
Building energy consumption (site energy) per unit of EUI-adjusted floor area per degree day, performance year:
12.80
Btu / GSF / Degree-Day (°F)
Optional Fields
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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):
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A brief description of energy use standards and controls employed by the institution (e.g. building temperature standards, occupancy and vacancy sensors):
Williams has a campus wide building management system. One of the many things that the BMS is used for is turning buildings to unoccupied mode at appropriate times, with both reduced temperatures and reduced ventilation rates.
A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:
Williams has installed indoor LED lighting in many campus buildings. We have also installed LED exterior lights throughout much of campus.
A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:
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A brief description of co-generation employed by the institution, e.g. combined heat and power (CHP):
In 2002, Williams replaced one of the three boilers at the heating plant with a boiler capable of supporting cogeneration, and installed a steam turbine/generator at the same time.
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):
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The website URL where information about the programs or initiatives is available:
Additional documentation to support the submission:
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Data source(s) and notes about the submission:
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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.