Effect of increased cabin recirculation airflow fraction on relative humidity, CO2 and TVOC

Victor Norrefeldt; Florian Mayer; Britta Herbig; Ria Ströhlein; Pawel Wargocki; Fang Lei

doi:10.3390/aerospace8010015

Effect of increased cabin recirculation airflow fraction on relative humidity, CO₂ and TVOC

Victor Norrefeldt^*, Florian Mayer, Britta Herbig, Ria Ströhlein, Pawel Wargocki, Fang Lei

^*Corresponding author for this work

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Abstract

In the CleanSky 2 ComAir study, subject tests were conducted in the Fraunhofer Flight Test Facility cabin mock-up. This mock-up consists of the front section of a former in-service A310 hosting up to 80 passengers. In 12 sessions the outdoor/recirculation airflow ratio was altered from today’s typically applied fractions to up to 88% recirculation fraction. This leads to increased relative humidity, carbon dioxide (CO₂) and Total Volatile Organic Compounds (TVOC) levels in the cabin air, as the emissions by passengers become less diluted by outdoor, dry air. This paper describes the measured increase of relative humidity, CO₂ and TVOC level in the cabin air for the different test conditions.

Original language	English
Article number	15
Journal	Aerospace
Volume	8
Issue number	1
Pages (from-to)	1-16
ISSN	2226-4310
DOIs	https://doi.org/10.3390/aerospace8010015
Publication status	Published - 2021

Bibliographical note

Funding Information:
Funding: This study received funding from the Clean Sky 2 Joint Undertaking under the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 820872-ComAir-H2020-CS2-CFP07-2017-02.

Keywords

Adaptive ECS
Aircraft air quality
Subject testing

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Cite this

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abstract = "In the CleanSky 2 ComAir study, subject tests were conducted in the Fraunhofer Flight Test Facility cabin mock-up. This mock-up consists of the front section of a former in-service A310 hosting up to 80 passengers. In 12 sessions the outdoor/recirculation airflow ratio was altered from today{\textquoteright}s typically applied fractions to up to 88% recirculation fraction. This leads to increased relative humidity, carbon dioxide (CO2) and Total Volatile Organic Compounds (TVOC) levels in the cabin air, as the emissions by passengers become less diluted by outdoor, dry air. This paper describes the measured increase of relative humidity, CO2 and TVOC level in the cabin air for the different test conditions.",

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AU - Wargocki, Pawel

AU - Lei, Fang

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