Williams College
OP-6: Clean and Renewable Energy
| Status | Score | Responsible Party |
|---|---|---|
|
1.83 / 4.00 |
Tanja
Srebotnjak Director Zilkha Center for Environmental Initiatives |
Total energy consumption, performance year:
Clean and renewable electricity (report kilowatt-hours):
| kWh | MMBtu | |
| Imported electricity from certified/verified clean and renewable sources (i.e., bundled green power purchases) | 18,649,707 Kilowatt-hours | 63,632.80 MMBtu |
| Electricity from on-site, clean and renewable sources (rights retained/retired) | 74.37 Kilowatt-hours | 0.25 MMBtu |
A brief description of the certified/verified sources of clean and renewable electricity:
On-site solar PV and purchased clean, renewable power.
A brief description of the on-site renewable electricity generating facilities/devices:
Williams has many solar photovoltaic arrays on campus, but most are through a power purchase agreement and we do not retain the RECs for those system. We have four systems for which we retain the RECs-- a 7.2 kw at Morley Labs and a 26.88 kw at Library shelving facility both of which are older and currently do not have working metering. There is a 14kw system on the Log, and at 20kW ground mount system at the Kellogg House. Data is only available for Kellogg House for FY21.
Clean and renewable thermal energy (report MMBtu):
| MMBtu | |
| Clean and renewable stationary fuels used on-site to generate thermal energy | 82.87 MMBtu |
| Imported steam, hot water, and/or chilled water from certified/verified clean and renewable sources | 0 MMBtu |
A brief description of the clean and renewable stationary fuels:
Williams has three solar hot water systems, but unfortunately does not have metering systems on them, so the energy generated from them is not included in this total. Williams also has geothermal energy systems at the Center for Development Economics dormitory and the Fort Bradshaw building. The metered heat pump data is shown here.
A brief description of the certified/verified sources of clean and renewable thermal energy:
The geothermal heat pumps are metered and thus verified internally.
Unbundled renewable energy products (report kWh):
| kWh | MMBtu | |
| Purchased RECs, GOs, I-RECs or equivalent unbundled renewable energy products certified by a third party | 19,232,785 Kilowatt-hours | 65,622.26 MMBtu |
A brief description of the unbundled renewable energy products:
Williams purchased Vintage 2020/2021 LIHI-certified ME Class I hydro RECs equivalent to approximately 79% of campus electricity usage occuring in FY21 (15,250 RECs). MA Class I RECs equivalent to 21% of campus electricity usage are retired on Williams' behalf by the electricity suppliers that serve Williams' campus electricity imports, to meet state Renewable Portfolio Standard and Clean Energy Standard goals.
Total clean and renewable energy generated or purchased:
Percentage of total energy consumption from clean and renewable sources:
Website URL where information about the institution’s support for clean and renewable energy is available:
Electricity use, by source (percentage of total, 0-100):
| Percentage of total electricity use (0-100) | |
| Biomass | 0.60 |
| Coal | 0.50 |
| Geothermal | 0 |
| Hydro | 2.80 |
| Natural gas | 43.90 |
| Nuclear | 6.10 |
| Solar photovoltaic | 10.90 |
| Wind | 8.60 |
| Other (please specify and explain below) | 26.60 |
A brief description of other sources of electricity not specified above:
The data reflect the energy mix from our main utility account with National Grid. The National Grid energy label also includes: Other: municipal trash (4.2%) + other renewable (0.7%) + imported power (17%) + oil (4.7%).
A more complete breakdown of all of our electricity sources (we have multiple smaller electric power accounts and generate electricity at our co-gen plant, which runs on natural gas) is not feasible to calculate.
Energy used for heating buildings, by source::
| Percentage of total energy used to heat buildings (0-100) | |
| Biomass | 0 |
| Coal | 0 |
| Electricity | 0 |
| Fuel oil | 8 |
| Geothermal | 2 |
| Natural gas | 90 |
| Other (please specify and explain below) | 0 |
A brief description of other sources of building heating not specified above:
Values are approximate. The main source is natural gas used by the co-gen central plant. A smaller amount of gas and fuel oil is used at buildings not on the central plant steam pipeline. A small but growing number of buildings is now using geothermal heat exchange systems.
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.