Description / Abstract:
A life support system (LSS) is usually defined as a system that
provides elements necessary for maintaining human life and health
in the state required for performing a prescribed mission. The LSS,
depending upon specific design requirements, will provide pressure,
temperature, and composition of local atmosphere, food, and water.
It may or may not collect, dispose, or reprocess wastes such as
carbon dioxide, water vapor, urine, and feces.
It can be seen from the preceding definition that LSS
requirements may differ widely, depending on the mission specified,
such as operation in Earth orbit or lunar mission. In all cases the
time of operation is an important design factor. An LSS is
sometimes briefly defined as a system providing atmospheric control
and water, waster, and thermal management.
The major subsystems required to accomplish the general
functions mentioned above are:
1. Breathing and pressurization gas storage system.
2. Temperature and humidity control system.
3. Carbon dioxide control system.
4. Trace contaminant control system.
5. Water management system.
6. Waste management system.