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High Efficiency, High Temperature Foam Core Heat Exchanger for Fission Surface…

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2009 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
CA Pacoima, CA 91331-2210
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2009
Title: High Efficiency, High Temperature Foam Core Heat Exchanger for Fission Surface Power Systems, Phase II
Agency: NASA
Contract: NNX09CA52C
Award Amount: $600,000.00


Fission-based power systems with power levels of 30 to ≥100 kWe will be needed for planetary surface bases. Development of high temperature, high efficiency heat exchangers is critical for next-generation nuclear power and space propulsion systems. In Phase I, Ultramet and Sandia National Laboratories demonstrated the feasibility of using high surface area foam core heat exchanger technology to substantially improve the power conversion efficiency of liquid metal-to-gas high temperature heat exchangers for fission surface power systems. Preliminary design and modeling suggested a substantial improvement in the efficiency of a liquid lithium-to-helium component relative to conventional plate-fin heat exchangers, and hardware fabrication and testing demonstrated the manufacturability, performance, and simplicity of the foam-based design. Open-cell foam is a natural coolant channel that does not require extensive, expensive machining of intricate coolant passages and eliminates the need for braze-bonding or welding of numerous individual sections. Initial testing showed the ability of textured, vapor-deposited lithium-compatible coatings to be uniformly wetted by liquid lithium at low temperature. The technology has the potential to best minimize the temperature difference between the maximum lithium reactor coolant and helium working fluid temperatures, as well as to reduce system mass and volume through the use of high surface area, low density open-cell foam, and increase safety and reliability by minimizing the number of piece parts and associated joints. In Phase II, Ultramet will team with Sandia to expand on the Phase I success by performing comprehensive design and stress analysis, determining physical properties, and establishing performance through high temperature (1000 K) thermal response and flow testing of coaxial heat exchangers using the Helium Flow Loop and Liquid Metal Integrated Test System at Sandia's Plasma Materials Test Facility.

Principal Investigator:

Brian E. Williams
Principal Investigator

Business Contact:

Craig N. Ward
Engineering Administrative Mgr
Small Business Information at Submission:

12173 Montague Street Pacoima, CA 91331

EIN/Tax ID: 952662293
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No