Low humidity in the aircraft cabin environment has been identified as a possible cause of symptoms experienced during long flights. A mock-up of a 21-seat section of an aircraft cabin with realistic pollution sources was built inside a climate chamber, capable of providing fresh outside air at very low humidity. Experiments simulating 7-hour transatlantic flights were car-ried out at four outside air supply rates - 1.4, 3.3, 4.7 and 9.4 L/s per person (3, 7, 10 and 20 cfm/p) - yielding average humidity levels of 28%, 16%, 11% and 7% RH, respectively. Four groups of 16-18 subjects were exposed to the four conditions. The subjects completed ques-tionnaires to provide subjective assessments of symptoms commonly experienced during flights. Increasing humidity to 28% RH by reducing outside air supply rate did not reduce the intensity of the symptoms typical of the aircraft cabin environment, and intensified headache, dizziness and claustrophobia.
|Title of host publication||Proceedings of the 10th International Conference on Indoor Air Quality and Climate - Indoor Air 2005|
|Place of Publication||Beijing|
|Publisher||Tsinghua University Press|
|Publication status||Published - 2005|
|Event||10th International Conference on Indoor Air Quality and Climate - Beijing, China|
Duration: 4 Sep 2005 → 9 Sep 2005
Conference number: 10
|Conference||10th International Conference on Indoor Air Quality and Climate|
|Period||04/09/2005 → 09/09/2005|
Strøm-Tejsen, P., Wyon, D. P., Lagercrantz, L. P., & Fang, L. (2005). Occupant evaluation of 7-hour exposures in a simulated aircraft cabin - Part 1: Optimum balance between fresh air supply and humidity. In Proceedings of the 10th International Conference on Indoor Air Quality and Climate - Indoor Air 2005 (Vol. 1.1, pp. 40-45). Tsinghua University Press.