Recovery Act - Phase Change Slurries for Residential Thermal Energy Storage

Award Information
Agency: Department of Energy
Branch: N/A
Contract: 02-10ER85667
Agency Tracking Number: 92460
Amount: $149,979.00
Phase: Phase I
Program: SBIR
Awards Year: 2010
Solicitation Year: 2009
Solicitation Topic Code: 01 b
Solicitation Number: DE-PS02-09ER09-27
Small Business Information
200 Yellow Place, Rockledge, FL, 32955
DUNS: 175302579
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James Cutbirth
 (321) 631-3550
Business Contact
 Michael Rizzo
Title: Dr.
Phone: (321) 631-3550
Research Institution
Currently, refrigeration and air conditioning in buildings account for approximately 8.5 quads of U.S. primary energy conception of which the primary consumption occurs with the refrigeration compressor. To alleviate this demand, thermal energy storage (TES) systems can be utilized to shift thermal loads to off-peak times. Cost savings can result if the pumping cost associated with the TES system is less than the difference of the compressor cost during peak times and off peak times. To assist in reducing energy demands within residential buildings, Mainstream proposes using an active TES based upon a phase change slurry (PCS) comprised of a water-glycol carrier and micro-encapsulated phase change material (PCM). This active system which can be integrated with the heating-ventilation-air conditioning (HVAC) system as well as directly coupled to the air stream within the building will reduce peak demand with a minimal energy penalty. For a 200-gallon capacity TES system, a 40% loading of the micro-encapsulated PCM will offer a thermal capacitance of 50 MJ. In practice, the thermal capacity will be greater than this value as the carrier fluid will possess additional capacitance as sensible heat storage. The conservative estimate translates to approximately 2.3 kW for 6 hours or 3.5 kW for 4 hours. TES systems, primarily based upon chilled water or ice-storage, have been utilized as a cost reduction method for industrial and large commercial sites for several decades and for the residential market in select trials. Each system has unique advantages and disadvantages. Chilled water systems are simple to implement but only offer moderate thermal capacitance per unit weight. Ice-storage systems offer high thermal capacitance but result in a greater system complexity. The proposed technology would have the operational simplicity of chilled water system while maintaining high thermal capacitance similar to ice-storage. The proposed TES would be integrated within the building

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government