Overall Rating Expired
Overall Score Expired
Liaison Michael Gulich
Submission Date March 27, 2013
Executive Letter Download

STARS v1.2

Purdue University
SD-10: Energy Use by Type

Status Score Responsible Party
Complete Expired Michael Gulich
Director of University Sustainability
University Sustainability
"---" indicates that no data was submitted for this field

The percentage of total electricity use from coal.:
90

The percentage of total electricity use from wind.:
0

The percentage of total electricity use from biomass.:
0

The percentage of total electricity use from natural gas.:
10

The percentage of total electricity use from solar PV.:
0

The percentage of total electricity use from geothermal.:
0

The percentage of total electricity use from nuclear.:
0

The percentage of total electricity use from hydro.:
0

The percentage of total electricity use from other.:
0

Provide a brief description.:
See Notes.

The percentage of total energy used for heating buildings from coal.:
90

The percentage of total energy used for heating buildings from biomass.:
0

The percentage of total energy used for heating buildings from electricity.:
0

The percentage of total energy used for heating buildings from natural gas.:
10

The percentage of total energy used for heating buildings from geothermal.:
0

The percentage of total energy used for heating buildings from fuel oil.:
0

The percentage of total energy used for heating buildings from other.:
0

Provide a brief description.:
---

If cogeneration, please explain.:
See Notes.

Boiler configuration:
•Two stoker coal boilers that can co-fire natural gas at 20% of each boiler's total capacity
•One fluidized bed coal boiler
•One dual fuel natural gas/fuel oil boiler
In 2013, after the new natural gas boiler is operational, one of the stoker coal boilers will be decommissioned.
The utility plant boilers generate steam which is distributed through a steam tunnel system at 125 PSIG and 15 PSIG. That steam is the sole heating source for 13.5 million gross square feet of campus buildings and is utilized in air handling units and for perimeter heat. Potable water is also heated with that steam. As the steam is used, it condenses and the condensate is returned to the utility plant. Over 90% of the steam that is distributed to campus is recycled back to the boilers.

Purdue produces electricity as a result of the cogeneration process. In the cogeneration process, steam is used to heat buildings, drive chillers, and produce electricity. As the result of cogeneration, Purdue's environmental footprint is significantly reduced. Over the course of the year, we typically generate 30-50% of the electricity required to meet campus needs.

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