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Analysis of an algae-based CELSS. Part 1: model development.

M T Holtzapple1, F E Little, M E Makela

  • 1Texas A&M University, College Station 77843-3118, USA.

Acta Astronautica
|April 1, 1989
PubMed
Summary
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A steady state chemical model aids life support system design by calculating material balances for oxygen, water, and food. This model supports trade-off studies for partially closed environmental control systems.

Area of Science:

  • Environmental Science
  • Chemical Engineering
  • Space Systems Engineering

Background:

  • Developing sustainable life support systems is crucial for long-duration space missions.
  • Accurate modeling is essential for optimizing resource utilization and minimizing waste in closed environments.

Purpose of the Study:

  • To develop a steady state chemical model and computer program for life support systems.
  • To apply the model to trade-off studies for system sizing and subsystem optimization.

Main Methods:

  • A steady state chemical model was developed based on crew metabolic needs for food and oxygen.
  • Modules for water recycle, waste treatment, CO2 removal, and food production were integrated.
  • A simple non-iterative solution using steady state rate equations was employed.

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Main Results:

  • The computer program calculates material balances for food, oxygen, water, nitrogen, and waste recycling.
  • The model was successfully applied to system sizing and subsystem trade-off analyses.
  • It provides a framework for evaluating different configurations of partially closed life support systems.

Conclusions:

  • The developed steady state chemical model and program are effective tools for life support system analysis.
  • This approach facilitates informed decision-making in the design and optimization of environmental control systems.
  • The model supports trade-off studies crucial for the development of sustainable space habitats.