passive system
[ˈpæsɪv ˈsɪstəm]
nounpl: passive systems
sistema passivo
1. A system that operates without external energy input or active control, relying on natural forces such as gravity, thermal convection, or air circulation
The building uses a passive system for cooling, utilizing natural ventilation and thermal mass.
O edifício utiliza um sistema passivo de refrigeração, aproveitando a ventilação natural e a massa térmica.
2. In technology and engineering, a system that responds to stimuli without requiring active intervention or powered components
The passive system in the satellite relies on solar panels and natural radiation to maintain stability.
O sistema passivo do satélite depende de painéis solares e radiação natural para manter a estabilidade.
3. In safety systems, a mechanism that automatically activates protective measures without human intervention
The vehicle's passive system includes airbags and crumple zones designed to absorb impact.
O sistema passivo do veículo inclui airbags e zonas de deformação projetadas para absorver impacto.
The term 'passive system' has gained significant importance in Brazil and Portugal due to growing environmental concerns and the adoption of sustainable building standards. It is particularly relevant in discussions about energy efficiency and green construction in both countries, reflecting the global shift toward passive house architecture and climate-responsive design.
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