Closed-Loop Life Support (Early Forms)

Initial development of systems for recycling air and water in confined environments like submarines and early spacecraft.

Core metadata

ID: closed_loop_life_support_early_forms
Era: Modern
First known date: 1947 (decade)
Region: Global / multiple regions
Review status: structurally_validated
Maturity: N/A

Prerequisites

Dependents

Fields

None.

Node sources

Advanced Technology for Human Support in Space (National Academies Press, 1997, review) • Supports: node
Locator: National Academies chapter explains that closed-loop life support processes waste products such as carbon dioxide, urine, and wastewater to recover oxygen or water for reuse.
Environmental Control & Life Support System (ECLSS) (NASA, 2023, official_agency) • Supports: node
Locator: NASA technical brief describes spacecraft ECLSS functions including cabin atmosphere maintenance and contaminant removal.

Prerequisite edge evidence

Edge/source evidence summary:

Prerequisite edges: 6
Average edge confidence: 69%
Prerequisite sources: 5
expert_inference: 6

Prerequisite	Type	Confidence	Evidence level	Note	Sources
Advanced Chemistry (advanced_chemistry)	enabling	68%	expert_inference	Advanced Chemistry provides a capability that enables this technology without being the only possible path.	Chemistry (Encyclopaedia Britannica, 2026, generic_overview) • Supports: edge
Classical Monumental Construction (construction)	enabling	68%	expert_inference	Construction provides a capability that enables this technology without being the only possible path.	Overview: Greek Temples (Reed College Greek and Latin Archaeological Museum, 2026, museum) • Supports: edge
Mechanical Refrigeration (refrigeration)	enabling	68%	expert_inference	Mechanical Refrigeration provides a capability that enables this technology without being the only possible path.	No sources recorded.
Space Flight (space_flight)	enabling	68%	expert_inference	Space Flight provides a capability that enables this technology without being the only possible path.	Sputnik and the Dawn of the Space Age (NASA, 2026, official_agency) • Supports: edge
Clinical Medicine (medicine_clinical)	enabling	68%	expert_inference	Clinical Medicine provides a capability that enables this technology without being the only possible path.	The Origins of the History and Physical Examination (National Library of Medicine (NCBI Bookshelf), 1990, textbook) • Supports: edge
Filters & Membranes (Early) (filters_membranes_early)	historical_predecessor	75%	expert_inference	Filters & Membranes (Early) is an earlier historical predecessor or foundation, not a one-to-one engineering dependency.	Filtration (Encyclopaedia Britannica, 2026, textbook) • Supports: edge

This page is generated from canonical era JSON and is indexable by URL.