Increased Capacity for Thermal Energy Storage by Combining Latent and Bonding Reaction Heat Storage

Award Information
Agency:
Department of Defense
Branch
n/a
Amount:
$99,674.00
Award Year:
2011
Program:
SBIR
Phase:
Phase I
Contract:
FA8650-11-M-5124
Award Id:
n/a
Agency Tracking Number:
F103-163-2289
Solicitation Year:
2010
Solicitation Topic Code:
AF103-163
Solicitation Number:
2010.3
Small Business Information
200 Yellow Place, Pines Industrial Center, Rockledge, FL, -
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
175302579
Principal Investigator:
J. Cutbirth
Sr. Mechanical Engineer
(321) 631-3550
mcutbirth@mainstream-engr.com
Business Contact:
Michael Rizzo
Chief Financial Officer
(321) 631-3550
mar@mainstream-engr.com
Research Institute:
Stub




Abstract
Avionic systems which feature low duty cycle heat loads, such as high-powered microwave (HPM) or high-energy lasers (HEL) require thermal energy storage (TES) to minimize the volume/mass of the thermal management system. The Air Force currently seeks a TES with system-based heat capacities of 68 kJ/kg and 120 MJ/m3 while allowing for a charge/discharge rate of 2 kW/kg. Currently state-of-the-art paraffin-, metal-hydride-, and ammonia-based reversible systems have volume based system heat capacities that do not exceed 90 MJ/m3. Mainstreams approach which combines both latent- and bond-reaction thermal storage is capable of>450 MJ/m3 by employing an open-loop concept that allows for recharging during ground-operations. This approach can easily be tailored for either HPM, 70 aC, or HEL, 20 aC, DEW. For the Phase I effort, Mainstream will experimentally demonstrate the heat capacity and heat input rate. The Phase II effort will focus on the integration of the TES with an avionic TMS. BENEFIT: Solid-state lasers for direct energy weapons (DEW) require a minimum capacity of 100 kW of optical power. However, existing efficiencies of the DEW are<10%, yielding a thermal load of>1 MW. However, DEWs are also characterized by low duty cycles allowing for thermal energy storage (TES) to significantly reduce the size of the thermal management system (TMS). Even if a reversible system could be designed to yield 120 MJ/m3 (current state of the art is<90 MJ/m3), the TES would require 12.6 m3 (assuming ATLS mission profile). However, if a mission profile can be designated pre-flight, the total energy storage would be defined allowing for an open-loop system that can be recharged during ground-operations between missions. Mainstreams open-loop system provides for a 5x increase over the SBIR solicitation in both mass- and volume-specific heat capacity without the obstacles faced with common open-loop systems such as water vaporization (inadequate operating temperatures and high vacuum requirement) and ammonia vaporization (hazardous material storage and venting). The proposed design would allow for optimization of TMS/TES for finite mission/life cycle systems such as single-flight UAVs, missiles, and DEWs.

* 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

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government