Commercial replacement of fluorocarbons in mobile air conditioning systems (MACS) with typically HC-290/600a[60/40] and minimal precautions began in Idaho in 1993. R290/600a has low environmental impact but mixed with air is flammable and frequencies for fire, injury and cabin overpressure were predicted. No such accidents are known from 1993 to mid-2003. R290/600a suppliers consumption, repres...

Volatile organic compounds (VOCs) are indoor air pollutants with many adverse health effects for humans. Ozone reactions with human surfaces (skin, hair, and clothing) are an important source of VOCs in the indoor air, especially in aircraft cabins because of their typically high ozone concentrations and occupant densities. Therefore, it is important to study the ozoneinitiated VOC emissions fr...

The CO2 heat pump air conditioning system of new energy vehicle is designed, and the model module management established based on KULI simulation. effects refrigerant charge, running time compressor speed studied, consumption compared with PTC heating without waste recovery. results show that optimal charge for full-service operation 750 g; increasing can increase cooling capacity, so temperatu...

The results of in-flight experiments to determine the structure sound field in cabin and pressure fluctuation fields on surface fuselage RRJ-95NEW-100 prototype aircraft are presented here. Wall spectrums obtained for three zones measuring windows (forward, center, rear fuselage) cruising flight mode. effect jet levels tail is considered. For an without interior, contribution main sources total...

Possible exposure to TriCresyl Phosphates (TCPs) has led to concerns among airline crew members. One isomer, Tri-ortho-Cresyl Phosphate (ToCP) is known to be neurotoxic and exposure to ToCP via contaminated cabin air has been suggested to be associated with the alleged Aerotoxic syndrome. The symptoms associated with Aerotoxic syndrome are diverse, including headaches, loss of balance, numbness...

As an important environmental problem, air quality influences urban population’s health and economic development. To investigate air quality changing trend and main factors affecting the quality of Tianjin in China, we employed grey dynamic model group and grey relational analysis. For forecasting, we first use model group to fit the annual average air pollution concentration of Tianjin from 20...

In this study, solid-state fermentation of two types of agricultural residues/products for lipase production in a tray-bioreactor was investigated. Rhizopus oryzae was used as a potential fungus strain and two types of agricultural residues including soybean meal and sugarcane bagasse were utilized as substrate. Fermentation was carried out in two different operational conditions: one with cont...