| Overall Rating | Platinum - expired |
|---|---|
| Overall Score | 87.10 |
| Liaison | Alex Davis |
| Submission Date | March 5, 2020 |
Arizona State University
OP-5: Building Energy Efficiency
| Status | Score | Responsible Party |
|---|---|---|
|
4.53 / 6.00 |
Alex
Davis Asst. Director University Sustainability Practices |
"---"
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 | 249,629,433.87 Kilowatt-hours | 851,735.63 MMBtu |
| Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems) | 36,869,557 Kilowatt-hours | 125,798.93 MMBtu |
Stationary fuels and thermal energy, performance year (report MMBtu):
| MMBtu | |
| Stationary fuels used on-site to generate electricity and/or thermal energy | 932,292 MMBtu |
| Imported steam, hot water, and/or chilled water | 47,574 MMBtu |
Total site energy consumption, performance year:
1,957,400.56
MMBtu
Performance year building space
24,300,504
Gross square feet
Floor area of energy intensive space, performance year:
| Floor area | |
| Laboratory space | 1,710,230 Square feet |
| Healthcare space | 32,721 Square feet |
| Other energy intensive space | 41,496 Square feet |
EUI-adjusted floor area, performance year:
27,827,902
Gross square feet
Performance year heating and cooling degree days
| Degree days | |
| Heating degree days | 1,226 Degree-Days (°F) |
| Cooling degree days | 4,713 Degree-Days (°F) |
Total degree days, performance year:
5,939
Degree-Days (°F)
Performance period
| Start date | End date | |
| Performance period | July 1, 2018 | June 30, 2019 |
Metric used in scoring for Part 1
11.84
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 | 281,491,396 Kilowatt-hours | 960,448.64 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 | 852,575 MMBtu |
| Imported steam, hot water, and/or chilled water | 18,079 MMBtu |
Total site energy consumption, baseline year:
1,831,102.64
MMBtu
Baseline year building space
17,419,855
Gross square feet
Baseline period
| Start date | End date | |
| Baseline period | July 1, 2006 | June 30, 2007 |
A brief description of when and why the energy consumption baseline was adopted:
To coincide with Arizona State University's first formal Greenhouse Gas inventory.
Source energy
3
Total energy consumption per unit of floor area:
| Site energy | Source energy | |
| Performance year | 0.08 MMBtu per square foot | 0.15 MMBtu per square foot |
| Baseline year | 0.11 MMBtu per square foot | 0.22 MMBtu per square foot |
Metric used in scoring for Part 2
30.06
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:
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A brief description of energy use standards and controls employed by the institution:
Approximately 75% of Arizona State University's buildings at the Tempe campus can be scheduled through the building automation system. This is a Johnson Controls Metasys system that is used to turn air handlers and pumps, etc. on and off according to the scheduling needs for a particular building or zone within a building. Building occupancy needs are determined by academic, research, and administrative staff, then equipment schedules are optimized to prevent unnecessary run-time.
The Polytechnic campus employs a system called Direct Digital Control (DDC). It’s an Alerton system that controls and maintains temperature ranges and generates reports on our energy usage, remote monitoring, and alarms.
West campus buildings have been upgraded to Computerized Direct Digital Controls. Buildings are operated based on the needs of the customer reducing building systems operating hours by over 50%.
Non-critical program spaces are designed around ASHRAE design conditions at 99% for heating and 2% for cooling. This results in less energy consumption to condition outdoor air.
Other typical strategies include, but are not limited to, outdoor air economizer control, occupancy/vacancy sensors, demand-control ventilation, and energy recovery.
The Polytechnic campus employs a system called Direct Digital Control (DDC). It’s an Alerton system that controls and maintains temperature ranges and generates reports on our energy usage, remote monitoring, and alarms.
West campus buildings have been upgraded to Computerized Direct Digital Controls. Buildings are operated based on the needs of the customer reducing building systems operating hours by over 50%.
Non-critical program spaces are designed around ASHRAE design conditions at 99% for heating and 2% for cooling. This results in less energy consumption to condition outdoor air.
Other typical strategies include, but are not limited to, outdoor air economizer control, occupancy/vacancy sensors, demand-control ventilation, and energy recovery.
A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:
Arizona State University continues its rollout of LED technologies in both new construction projects as well as tenant improvements. In many cases, ASU leverages its Sustainability Initiatives Revolving Fund (SIRF) as a financial resource to implement these upgrades due to the quick return on investment of these projects. To date, ASU has updated over 10,000 fixtures with LEDs and has saved over 1,500,000 kWh annually.
A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:
None.
A brief description of co-generation employed by the institution:
An 8.8 MW natural gas-fired combined heat & power plant provides nearly 45,000 MWh of electricity to ASU's research community at the Tempe Campus and is able to provide 6,000 tons of chilled water and 80,000 lbs of steam to the whole campus.
A brief description of the institution's initiatives to replace energy-consuming appliances, equipment, and systems with high efficiency alternatives:
ASU currently recommissions 30 buildings from the Energy Savings Performance Contract – Phase II on a rotational basis every 4 years. This portfolio equates to 2,929,643 square feet of space, approximately 13% of ASUs gross square footage.
ASU is currently evaluating a third Energy Savings Performance Contract - Phase III which will provide Energy Conservation Measures in approximately 34 buildings, equating to 3,343,302 square feet of space, approximately 14% of ASU's gross square footage.
ASU has set up an Energy Innovations Team that is actively pursuing and implementing other energy savings opportunities at all campuses, such as LED retrofits, central plant optimization, motor replacements, control strategies, etc.
ASU is currently evaluating a third Energy Savings Performance Contract - Phase III which will provide Energy Conservation Measures in approximately 34 buildings, equating to 3,343,302 square feet of space, approximately 14% of ASU's gross square footage.
ASU has set up an Energy Innovations Team that is actively pursuing and implementing other energy savings opportunities at all campuses, such as LED retrofits, central plant optimization, motor replacements, control strategies, etc.
Website URL where information about the institution’s energy conservation and efficiency program is available:
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Additional documentation to support the submission:
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Data source(s) and notes about the submission:
Under "Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)," the 36,869,557 kWh represents electricity generated by ASU's 24 MW of on-campus solar. We do not retain the RECs for these systems. However, this electricity feeds directly into our campus buildings and as such does not suffer from transmission and distribution losses. Please note that this reported electricity for on-site systems is only that which is directly consumed by our campus buildings. Any electricity that was exported to the regional grid because instantaneous on-site generation exceeded instantaneous on-site demand was not included. Additionally, please note that for GHG accounting purposes, this electricity is reported in OP-6 as grid mix that is matched with Green-e RECs.
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.