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High Efficiency, High Temperature Foam Core Heat Exchanger for Fission Surface Power Systems, Phase II Project

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
9 April 2015
Modified Date
8 July 2015
Publishers
National Aeronautics and Space Administration
Keywords
completed, glenn-research-center, project
Identifier
high-efficiency-high-temperature-foam-core-heat-exchanger-for-fission-surface-power-system-15a2a
Landing Page
http://techport.nasa.gov/view/7751
Maintainers
TECHPORT SUPPORT hq-techport@mail.nasa.gov
Language
en-US

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Description

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.

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This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

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