Icephobic Heat Exchange for Efficient, Resilient Building Cooling

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Lead Performer: Active Energy Systems Inc. - Knoxville, Tennessee
DOE Total Funding: $199,994
FY20 DOE Funding: $199,994
Project Term: June 29, 2020 – June 28, 2021
Funding Type: Small Business Innovative Research (SBIR) Project

Project Objective

This project will enable low-cost, efficient thermal energy storage to provide long-duration resilient cooling when the electric grid is down. Icephobic heat exchange stops freezing water from sticking to cold surfaces and can increase the attractiveness of ice thermal energy storage. Unlike today’s commercial ice-on-coil (IOC) systems, icephobic systems stops freezing water from sticking to cold surfaces, improving heat transfer rates and increasing system design freedom. The developed system will be able to provide 12 hours of cooling during a power outage (with a small amount of electrical input from backup power), pay for itself within 30 months, and improve energy efficiency by 15% compared to traditional ice storage.

Project Impact

This project will improve overall cost and efficiency of ice thermal storage and reduce barriers to deploying ice thermal storage as a resilience resource.


DOE Technology Manager: Antonio Bouza
Lead Performer: Mitchell Ishmael, Active Energy Systems