Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Modeling of VOC removal in a commercial airplane hangar by multiple exhaust hoods

Fei Liu, Tengfei Zhang, Haiqiao Zhang, Qiannan Huo, Jihong Wang, Zhengwei Long, Junjie Liu
Tianjin University, China, People's Republic of

Abstract: Ventilation is a major means to remove volatile organic compounds (VOCs). Currently both an upside-supply and floor-exhaust (UF) system and an upside-supply and downside-exhaust (UD) system are used in airplane painting hangars. However, these two conventional systems have low ventilation efficiency. To improve the VOC removal efficiency, this study proposed a novel upside-supply and multiple air-exhaust (UM) system. The new system delivers conditioned air through ceiling inlets, as do the UF and UD systems, but it uses multiple portable exhaust hoods to extract VOCs. The VOC emission sources move with the painting locations; in response, the exhaust hoods are also moved so that they are adjacent to the sources. The ventilation performance of the proposed UM system, and that of the UF and UD systems, was modeled with computational fluid dynamics (CFD). In addition, the UM system was measured on site after putting it into engineering application. The results revealed that the flow pattern of the UM system is similar to that of the push-pull ventilation, and the VOCs are efficiently exhausted. The VOC concentrations in the occupied zone are significantly reduced as compared with the conventional UF and UD systems.
Keywords: Ventilation, Painting, VOCs, Hangar, CFD
Pages: 3389 - 3395