Modeling of heat and mass transfer in a tec-driven lyophilizer

Zeng Guang Yuan*, Uday Hegde, Eric Litwiller, Michael Flynn, John Fisher

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

Dewatering of wet waste during space exploration missions is important for crew safety as it stabilizes the waste. It may also be used to recover water and serve as a preconditioning step for waste compaction. A thermoelectric cooler (TEC)- driven lyophilizer is under development at NASA Ames Research Center for this purpose. It has three major components: (i) an evaporator section where water vapor sublimes from the frozen waste, (ii) a condenser section where this water vapor deposits as ice, and (iii) a TEC section which serves as a heat pump to transfer heat from the condenser to the evaporator. This paper analyses the heat and mass transfer processes in the lyophilizer in an effort to understand the ice formation behavior in the condenser. The analysis is supported by experimental observations of ice formation patterns in two different condenser units.

Original languageEnglish (US)
DOIs
StatePublished - Dec 1 2006
Event36th International Conference on Environmental Systems, ICES 2006 - Norfolk, VA, United States
Duration: Jul 17 2006Jul 20 2006

Other

Other36th International Conference on Environmental Systems, ICES 2006
CountryUnited States
CityNorfolk, VA
Period07/17/0607/20/06

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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