| Overall Rating | Gold |
|---|---|
| Overall Score | 71.04 |
| Liaison | Natalie Hayes |
| Submission Date | Oct. 19, 2023 |
Bentley University
OP-5: Building Energy Efficiency
| Status | Score | Responsible Party |
|---|---|---|
|
5.45 / 6.00 |
Natalie
Hayes Associate Director of Sustainability Office of Sustainability |
"---"
indicates that no data was submitted for this field
Part 1. Site energy use per unit of floor area
Performance year energy consumption
| kWh | MMBtu | |
| Imported electricity | 17,424,358 Kilowatt-hours | 59,451.91 MMBtu |
| Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems) | 561,647 Kilowatt-hours | 1,916.34 MMBtu |
Stationary fuels and thermal energy, performance year (report MMBtu):
| MMBtu | |
| Stationary fuels used on-site to generate electricity and/or thermal energy | 50,078 MMBtu |
| Imported steam, hot water, and/or chilled water | 0 MMBtu |
Total site energy consumption, performance year:
111,446.25
MMBtu
Performance year building space
2,200,000
Gross square feet
Floor area of energy intensive space, performance year:
| Floor area | |
| Laboratory space | 3,500 Square feet |
| Healthcare space | 0 Square feet |
| Other energy intensive space | 5,009 Square feet |
EUI-adjusted floor area, performance year:
2,212,009
Gross square feet
Performance year heating and cooling degree days
| Degree days | |
| Heating degree days | 5,494 Degree-Days (°F) |
| Cooling degree days | 688 Degree-Days (°F) |
Total degree days, performance year:
6,182
Degree-Days (°F)
Performance period
| Start date | End date | |
| Performance period | July 1, 2021 | June 30, 2022 |
Metric used in scoring for Part 1
8.15
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.
| kWh | MMBtu | |
| Imported electricity | 27,339,811.76 Kilowatt-hours | 93,283.44 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):
| MMBtu | |
| Stationary fuels used on-site to generate electricity and/or thermal energy | 55,147.86 MMBtu |
| Imported steam, hot water, and/or chilled water | 0 MMBtu |
Total site energy consumption, baseline year:
148,431.30
MMBtu
Baseline year building space
1,850,233
Gross square feet
Baseline 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:
A baseline year of 2008 is used for Bentley's carbon footprint reduction targets. Bentley signed the ACUPCC in 2007 as such 2008 was selected as the baseline.
Source energy
3
Total energy consumption per unit of floor area:
| Site energy | Source energy | |
| Performance year | 0.05 MMBtu per square foot | 0.10 MMBtu per square foot |
| Baseline year | 0.08 MMBtu per square foot | 0.18 MMBtu per square foot |
Metric used in scoring for Part 2
42.17
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:
---
A brief description of energy use standards and controls employed by the institution:
The University enforces a temperature policy which is managed by Facilities Management. All interior spaces will be cooled to 74°F and heated to 68°F. Facilities Management recognizes that temperatures will vary within buildings and every effort is made to stay within 3°F of this range. These temperatures are set by Facilities Management using a centralized building energy control system. Occupants who control their own temperature are asked to adhere to this policy.
A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:
Bentley University continues to upgrade interior lighting to LED in stages on campus. Currently Bentley has upgraded lighting to LED fixtures in all outdoor roadways, walkways, and parking garages and in several buildings starting with interior stairways and hallways.
A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:
The construction of a 3,000 square foot solar thermal wall on the southern external wall of the Dana Athletic Center was completed in September 2009. The solar wall is made of perforated material and is installed several inches from the exterior wall of the building to create an air cavity.
The solar wall, which traps heat from the sun, is hooked up to a heating, ventilation and air conditioning (HVAC) unit. When the HVAC unit calls for outdoor air, the air is pulled through the solar wall and is heated in the process. The hot air rises up the air cavity created between the solar wall and the building's exterior wall and enters the HVAC unit. By providing the unit with pre-heated air, less energy is required to warm the air to room temperature.
The solar wall, which traps heat from the sun, is hooked up to a heating, ventilation and air conditioning (HVAC) unit. When the HVAC unit calls for outdoor air, the air is pulled through the solar wall and is heated in the process. The hot air rises up the air cavity created between the solar wall and the building's exterior wall and enters the HVAC unit. By providing the unit with pre-heated air, less energy is required to warm the air to room temperature.
A brief description of co-generation employed by the institution:
N/A
A brief description of the institution's initiatives to replace energy-consuming appliances, equipment, and systems with high efficiency alternatives:
Bentley's facilities management team closely monitors the performance of campus buildings and equipment via the EMS. The Energy & Utilities Manager tweaks HVAC and mechanical settings in all buildings to ensure high efficiency performance.
Website URL where information about the institution’s energy conservation and efficiency program is available:
Additional documentation to support the submission:
---
Data source(s) and notes about the submission:
Electricity conversion from KWh to MMBTU = (KWH * 3412.14)/1,000,000
Heating and Cooling Days calculated from Energy Star Portfolio Manager.
The reduction in electricity usage from baseline year to performance year is due to Facilities Management long-standing commitment to energy efficiency, completing numerous projects each year, retrofitting building systems to reduce both electricity and natural gas. Supplemental to this, the Bentley Green Revolving Fund serves as an ongoing mechanism to fund energy efficiency projects to reduce energy and operating costs. Finally, the university uses a state-of-the-art Energy Management System which allows Facilities Management to both determine how much energy is being used in various campus buildings and ensure efficient operation of heating, cooling and lighting systems.
Heating and Cooling Days calculated from Energy Star Portfolio Manager.
The reduction in electricity usage from baseline year to performance year is due to Facilities Management long-standing commitment to energy efficiency, completing numerous projects each year, retrofitting building systems to reduce both electricity and natural gas. Supplemental to this, the Bentley Green Revolving Fund serves as an ongoing mechanism to fund energy efficiency projects to reduce energy and operating costs. Finally, the university uses a state-of-the-art Energy Management System which allows Facilities Management to both determine how much energy is being used in various campus buildings and ensure efficient operation of heating, cooling and lighting systems.
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.