Odor from Building Air Conditioners: Emission Characteristics, Odor Compounds and Influencing Factors

被引:3
|
作者
Pei, Jingjing [1 ]
Sun, Luyao [1 ]
机构
[1] Tianjin Univ, Sch Environm Sci & Engn, Tianjin Key Lab Indoor Air Environm Qual Control, Tianjin 300072, Peoples R China
关键词
odorant; odor active value; GC; O; MS; condensed water; perceived air quality; VOLATILE ORGANIC-COMPOUNDS; SENSORY EVALUATION; COOLING UNITS; INDOOR; EVAPORATOR; PARAMETERS; QUALITY; OFFICE;
D O I
10.3390/su15021495
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The odor generated by air conditioners is an important factor influencing the perceived air quality in buildings. In this study, different types of air conditioners and air filters were investigated to study the level of odor emission related to the operation state of the compressor, to identify the odor compounds and to analyze the cooling setpoint temperature on emitted odor intensity. Results show that the odor from constant frequency air conditioner use is periodic and stronger than that from variable frequency air conditioner use due to the different operation strategies of the compressor, which affect the evaporation of condensed water on the surface of the cooling coil. Ethyl acetate, acetic acid, 2-ethyl-1-hexanol, acetaldehyde, hexanal, nonanal, toluene and n-hexane are identified as odor compounds by Odor Active Value (OAV), Gas Chromatography/Olfactory/Mass Spectrometry (GC/O/MS) and Flavornet methods. The higher cooling setpoint temperature would lead to stronger odor, due to greater release of hydrophilic odorous compounds from condensed water. In our opinion, reducing the residual condensed water in air conditioners may be the key to control odor emission before purification.
引用
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页数:17
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