Effect of Increased Cabin Recirculation Airflow Fraction on Relative Humidity, CO2 and TVOC

Norrefeldt, Victor; Mayer, Florian; Herbig, Britta ; Ströhlein, Ria; Wargocki, Pawel and Lei, Fang (13. January 2021): Effect of Increased Cabin Recirculation Airflow Fraction on Relative Humidity, CO2 and TVOC. In: Aerospace, Vol. 8, No. 15: pp. 1-16

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.

• Item Type: Journal article
• EU Funded Grant Agreement Number: 820872
• EU Projects: Horizon 2020 > Other > Joint Technology Initiative > Joint Technology Initiative - Clean Sky 2
• Form of publication: Publisher's Version
• Keywords: aircraft air quality; adaptive ECS; subject testing
• Faculties: Medicine > Institute and Polyclinic for Occupational, Social and Environmental Medicine
• Subjects: 600 Technology > 600 Technology; 600 Technology > 610 Medicine and health
• ISSN: 2226-4310
• Language: English

References

1. Zavaglio, E.; Le Cam, M.; Thibaud, C.; Quartarone, G.; Zhu, Y.; Franzini, G.; Roux, P.; Dinca, M.;Walte, A.; Rothe, P. Innovative Environmental Control System for Aircraft. In Proceedings of the 49th International Conference on Environmental Systems ICES-2019-171, Boston, MA, USA, 7–11 July 2019. 2. Oehler, B. Modeling and Simulation of Global Thermal and Fluid Effects in an Aircraft Fuselage. In Proceedings of the 4th International Modelica Conference, Hamburg University of Technology, Hamburg-Harburg, Germany, 7–8 March 2005. 3. ASHRAE. Standard 161-Air Quality Within Commercial Aircraft; ASHRAE: Atlanta, GA, USA, 2007. 4. Umweltbundesamt: Beurteilung von Innenraumluftkontaminationen mittels Referenz- und Richtwerten. Bundesgesundheitsbl Gesundheitsforsch Gesundheitsschutz 2007, 50, 990–1005. 5. DIN EN 15251:2012-12: Indoor Environmental Input Parameters for Design and Assessment of Energy Performance of Buildings Addressing Indoor Air Quality, Thermal Environment, Lighting and Acoustics; German Version EN 15251:2007; Beuth Verlag: Berlin, Germany, 2012. 6. Zavaglio, E.; Le Cam, M.; Quartarone, G.; Thibaud, C. An overview of indoor air quality and ventilation standards in Commercial buildings and aircrafts. In Proceedings of the Indoor Air Conference, Philadelphia, PA, USA, 22–27 July 2018. 7. Giaconia, C.; Orioli, A.; Di Gangi, A. Air quality and relative humidity in commercial aircrafts: An experimental investigation on short-haul domestic flights. Build. Environ. 2013, 67, 69–81. 8. Vaisala: Application Note-How to Measure Carbon Dioxide. 2019. Available online: https://www.vaisala.com/en/file/66231/ download?token=k98ud14E (accessed on 1 October 2020). 9. Cao, X.; Zevitas, C.D.; Spengler, J.D.; Coull, B.; McNeely, E.; Jones, B.; Loo, S.M.; MacNaughton, P.; Allen, J.G. The on-board carbon dioxide concentrations and ventilation performance in passenger cabins of US domestic flights. Indoor Built Environ. 2019, 28, 761–771. 10. EU Funding and Tenders. Available online: https://ec.europa.eu/info/funding-tenders/opportunities/portal/screen/ opportunities/topic-details/jti-cs2-2015-cpw02-sys-02-02 (accessed on 19 June 2015). 11. DIN EN 60751:2009-05: Industrial Platinum Resistance Thermometer Sensors; German Version EN 60751:2008; Beuth Verlag: Berlin, Germany, 2009. 12. Rotronic: Gesamtkatalog 2009/10–Feuchte- und Temperaturmessung. 2009. Available online: https://www.rotronic.com/de-de/ productattachments/index/download?id=419 (accessed on 1 October 2020). 13. DIN ISO 16000-6:2012-11: Indoor Air—Part 6: Determination of Volatile Organic Compounds in Indoor and Test Chamber Air by Active Sampling on Tenax TA®Sorbent, Thermal Desorption and Gas Chromatography Using MS or MS-FID, German version ISO 16000-6:2011; Beuth Verlag: Berlin, Germany, 2012. 14. DIN ISO 16000-3:2013-01: Indoor air—Part 3: Determination of Formaldehyde and Other Carbonyl Compounds in Indoor Air and Test Chamber Air—Active Sampling Method; German Version ISO 16000-3:2011; Beuth Verlag: Berlin, Germany, 2013. 15. Schmidt Technology: Flow Sensor SS20.500. 2020. Available online: https://schmidttechnology.de/wp-content/uploads/ wpallimport/files/api_files/downloads/Instr_SS20.500_dt.pdf (accessed on 1 October 2020). 16. Federal Aviation Administration (FAA). Airworthiness Standards: Transport Category Airplanes. Federal Aviation Regulation-Part 25; FAA:Washington, DC, USA, 2005. 17. DIN ISO 16000-30:2015-05: Indoor Air—Part 30: Sensory Testing of Indoor Air; German Version ISO 16000-30:2014; Beuth Verlag: Berlin, Germany, 2015. 18. Wargocki, P. Measurements of the effects of air quality on sensory perception. Chem. Sens. 2001, 26, 345–348. 19. Wargocki, P. Sensory pollution sources in buildings. Indoor Air 2004, 14, 82–91. 20. DIN EN ISO 7730:2006-05: Ergonomics of the Thermal Environment–Analytical Determination and Interpretation of Thermal Comfort Using Calculation of the PMV and PPD Indices and Local Thermal Comfort Criteria; German Version ISO 7730:2005; Beuth Verlag: Berlin, Germany, 2006. 21. Herbig, B.; Ivandic, I.; Ströhlein, R.; Mayer, F.; Norrefeldt, V.; Lei, F.; Wargocki, P. Impact of different ventilation strategies on aircraft cabin air quality and passengers’ comfort and wellbeing-the ComAir study. In Proceedings of the ICES-International Conference on Environmental Systems, Lisbon, Portugal, 12–16 July 2020.