Title: Investigation of thermodynamic performance based on the humidity effect in the aircraft environmental control systems
Authors: Seda Tuzemen; Onder Altuntas; M. Ziya Sogut; T. Hikmet Karakoc
Addresses: TUSAS Engine Industries (TEI), TR-26003, Eskisehir, Turkey ' Faculty of Aeronautics and Astronautics, Anadolu University, TR-26470 Eskisehir, Turkey ' Faculty of Aeronautics and Astronautics, Anadolu University, TR-26470 Eskisehir, Turkey ' Faculty of Aeronautics and Astronautics, Anadolu University, TR-26470 Eskisehir, Turkey
Abstract: Some environmental parameters, such as pressure, temperature, humidity and velocity, of air are important for passengers, stayed in aircraft cabin. These values change with altitudes, also atmospheric conditions. The humidity values, especially one of these values, inside aircraft not only affect the indoor air quality directly but also may damage electronic equipment. Environmental control systems (ECSs) have a very important role to control temperature and humidity and to eliminate the negative effects such as increasing fossil fuel use and accordingly global warming potential due to the irreversibilities in the system. In this study, thermodynamic analyses of the effect of humidity on the indoor air quality for a commercial airplane were performed in different altitudes. Energy efficiency was obtained between 93.6% and 55.2% and exergy efficiency was obtained between 49.6% and 23.14% at the altitude range of 0-12,192 m.
Keywords: environmental control systems; ECS; thermodynamic performance; humidity effect; thermodynamics; aircraft environmental control; indoor air quality; electronic equipment; temperature control; commercial airplanes; energy efficiency; exergy efficiency.
International Journal of Sustainable Aviation, 2015 Vol.1 No.3, pp.203 - 217
Received: 18 Jul 2014
Accepted: 22 Aug 2014
Published online: 03 Jul 2015 *