Overall Rating Gold - expired
Overall Score 70.69
Liaison Careen Arsenault
Submission Date March 8, 2013
Executive Letter Download

STARS v1.2

Cornell University
OP-8: Clean and Renewable Energy

Status Score Responsible Party
Complete 2.60 / 7.00 Ed Wilson
Sustainable Energy Team Manager
Energy & Sustainability
"---" indicates that no data was submitted for this field

Option 1: Total clean and renewable electricity generated on site during the performance year and for which the institution retains or has retired the associated environmental attributes :
18,352 MMBtu

Option 2: Non-electric renewable energy generated:
580,093 MMBtu

Option 3: Total clean and renewable electricity generated by off-site projects that the institution catalyzed and for which the institution retains or has retired the associated environmental attributes :
0 MMBtu

Option 4: Total RECs and other similar renewable energy products that the institution purchased during the performance year that are Green-e certified or meet the Green-e standard's technical requirements and are third party verified:
0 MMBtu

Option 5: Total electricity generated with cogeneration technology using non-renewable fuel sources :
1,874,542 MMBtu

Total energy consumed during the performance year :
2,878,243 MMBtu

A brief description of on-site renewable electricity generating devices :

Cornell owns and operates two hydroelectric generators. The turbine manufacturer is Ossberger and the units are rated at 712 kw and 997 kw. In addition, there are two solar photovoltaic installations of 15.0 and 2.2 kw.


A brief description of on-site renewable non-electric energy devices:

Cornell has installed two solar hydronic hot water systems. The systems use the solar energy to heat water in evacuated tube solar collectors. The systems are designed to offset the need for fossil fuels to provide a portion of the heating and hot water needs of two campus facilities (23 total panels with 30 tubes each). Each tube is rated at 1,000 btu/day at peak summer solar insolation.

Cornell also has a heat exchange facility (Lake Source Cooling) to produce up to 20,000 peak tons of chilled water for campus. It generates renewable cooling by exchange heat to cold water from deep in Cayuga Lake saving 86% of the energy of conventional cooling (~25 million kWhr/year, about 10% of total campus electricity usage).


A brief description of off-site, institution-catalyzed, renewable electricity generating devices:
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A brief description of RECs or other similar renewable energy products purchased during the previous year, including contract timeframes:
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A brief description of cogeneration technologies deployed:

Cornell placed into service two Solar Titan 130 Combustion Turbines (2@15 MWe)with Rentech dual pressure Heat Recovery Steam Generators in December of 2009. In addition, there are two back pressure steam turbines (8 MWe total) that produce electricity with steam prior to the steam being used for heating purposes on campus. These co-generation systems result in a thermal efficiency of approximately 78% and have allowed the university to discontinue the use of coal. Energy generated with co-generation technology includes electric and steam.


The website URL where information about the institution's renewable energy sources is available:

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 and complete the Data Inquiry Form.