24 research outputs found
Performance evaluation of different air distraction system on thermal uniformity and energy saving: A case study of a Japanese detached house
Field measurements of comfort, seasonal performance and cold stress in cross-laminated timber (CLT) school buildings
Simulated comparative investigation of the daylight and airflow of the conventional Egyptian shutter ‘ sheesh’
The Energy Saving Potential and the Associated Thermal Comfort of Displacement Ventilation Systems Assisted by Personalised Ventilation
An approach for making optimal decisions in building energy efficiency retrofit projects
Tracing indoor contaminant release location based on local mean residual-life-time of air
Numerical study of different ceiling-mounted air distribution systems for a virtual classroom environment
This paper presents a comparative numerical study of different ceiling-mounted-localized air distribution systems placed above students in a virtual classroom in summer conditions. The influence of four different ceiling-mounted-localized air distribution systems, using vertical descendent jets, on the thermal comfort, local thermal discomfort, and air quality levels was numerically evaluated. The air distribution index, developed previously, was used for non-uniform environment. This index considers the thermal comfort level, air quality level, effectiveness for heat removal, and effectiveness for contaminant removal. Numerical simulations were conducted for a virtual classroom equipped with one of four different ceiling-mounted-localized air distribution systems and with 6 desks, 6 or 12 students, and 2 upper airflow outlets. Inlet air supply temperature of 20 and 24? and an outdoor air temperature of 28? were used. The simulation results show that the air supply system having a vertical air jet placed at 1.8m above the floor level (Case III), and with an inlet area of 0.01m(2) and a supply air velocity of 3m/s would represent the best option in comparison with other air supply methods. In general, the air distribution index value decreases with an increase in inlet air temperature and the number of occupants. The air distribution index values are highest for Case III representing a classroom with 6 or 12 occupants with an inlet air temperature of 20 or 24?.info:eu-repo/semantics/publishedVersio