A novel targeted personalized ventilation system based on the shooting concept

Publication date: 1 May 2018
Source:Building and Environment, Volume 135
Author(s): Ran Gao, Chengzhe Wang, Angui Li, Shengrui Yu, Baoshun Deng
Thermal comfort and energy saving has drawn widespread attention in recent years, and personalized ventilation (PV) is a theoretical air supply method designed for both comfort and energy savings. This study introduces a targeted personalized ventilation (TPV) system formed by a multi-tuyere apparatus and based on the concept of targeted ventilation. Corresponding targeted ventilation indices are introduced to evaluate regional thermal comfort, and the effectiveness of the ventilation systems is presented. Turbulence model selection is conducted by comparing computational fluid dynamics (CFD) and experimental data to determine the practical effect of the TPV. The TPV provides air supply to the controlled area and thus improves the utilization ratio of the flow field. The air supply through the coupled tuyeres results in a uniform flow field with air speeds very close to 0.3 m/s. Compared with other PV systems, the velocity target value of the TPV system proposed in this paper is 40.5% lower, and the energy-saving rate reaches 52.9%. The effects of the TPVs were verified in a full-scale experiment.