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Lyophilization for Water Recovery
Technical Paper
2001-01-2348
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An energy-efficient lyophilization technique is being developed to recover water from highly contaminated spacecraft waste streams. In the lyophilization process, water in an aqueous waste is frozen and then sublimed, separating the waste into a dried solid material and liquid water. This technology is ideally suited to applications such as the Mars Reference Mission, where water recovery rates approaching 100% are desirable but production of CO2 is not. Candidate wastes include feces, concentrated brines from water processors, and other solid wastes that contain water. To operate in microgravity, and to minimize power consumption, thermoelectric heat pumps can be used in place of traditional fluid cycle heat pumps. A mathematical model of a thermoelectric lyophilizer is described and used to generate energy use and processing rate estimates.
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Citation
Litwiller, E., Reinhard, M., Flynn, M., and Fisher, J., "Lyophilization for Water Recovery," SAE Technical Paper 2001-01-2348, 2001, https://doi.org/10.4271/2001-01-2348.Also In
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