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University of Arizona - Calmac

Technology Type Ice Thermal Storage
Rated Power 3000 kW
URL More about University of Arizona - Calmac
Ice storage technology is both common and unique. It is common since it does for cooling what a domestic water heater does for hot water. As a unique cooling option, ice storage is the only air-conditioning system that utilizes plentiful nighttime produced electricity to generate and store daytime cooling. As a result, it provides the key benefit of lowering greenhouse gas emissions along with reducing the cost of cooling from on-peak electric demand. In utility-driven cooling applications, ice storage provides a nighttime electric load to store cooling. In the U of A cogeneration application however, ice storage not only stores the cooling, it also provides a nighttime electric load in order to produce steam for use by the University Medical Center. The university placed three separate orders for energy storage tanks and they were added to two of their three existing central plants in 2004, 2006 and 2007. There are 205 tanks total at the two plants.
This data has been validated by project staff through a review of publicly available information about the project, and verified by the project owner.
Project Status
Status Operational
Commissioning On 07.08.2004
Project Includes Multiple Systems No

1339 E. Helen Street
Tucson, Arizona 85717
United States

Utility Tucson Electric Power
Utility Type Investor Owned
Paired Grid Resource Secondary Distribution
Paired Grid Resource Cogeneration plants at the University
Project Includes Multiple Systems No
Ownership & Value Chain Partners
Ownership Model Customer-Owned
Equity Owner 1 University of Arizona
Equity Owner 1 Percent 100%
Energy Storage Technology Provider CALMAC
Cost & Performance
Projected Project Lifetime 25 years
Performance RTE 99%
Service Use Case Electric Bill Management
Electric Energy Time Shift
Electric Supply Reserve Capacity - Non-Spinning
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