NASA ISS Portable Fan Assembly Acoustics

Boone, Andrew ; Allen, Christopher S ; Hess, Linda F

关键词: ACOUSTIC ATTENUATION;    CARBON DIOXIDE REMOVAL;    ENVIRONMENTAL CONTROL;    EXHAUST EMISSION;    LIFE SUPPORT SYSTEMS;    LITHIUM HYDROXIDES;    MUFFLERS;    NOISE INTENSITY;    SPACE STATION MODULES;    ACOUSTIC PROPERTIES;    AIRLOCK MODULES;    EXHAUST GASES;    INTERNATIONAL SPACE STATION;    NOISE REDUCTION;    VENTILATION;   

RP-ID  :  JSC-CN-40592

学科分类：航空航天科学

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来源: NASA Technical Reports Server

【 摘 要 】

The Portable Fan Assembly (PFA) is a variable speed fan that can be used to provide additional ventilation inside International Space Station (ISS) modules as needed for crew comfort or for enhanced mixing of the ISS atmosphere. This fan can also be configured with a Shuttle era lithium hydroxide (LiOH) canister for CO2 removal in confined areas partially of fully isolated from the primary Environmental Control and Life Support System (ECLSS) on ISS which is responsible for CO2 removal. This report documents noise emission levels of the PFA at various speed settings and configurations. It also documents the acoustic attenuation effects realized when circulating air through the PFA inlet and outlet mufflers and when operating in its CO2 removal configuration (CRK) with a LiOH canister (sorbent bed) installed over the fan outlet.