CFD study of the thermal environment in an air-conditioned train station building

Investigation on the thermal comfort and energy efficiency of stratified air distribution systems

“…They found that by using a stratified air distribution in the terminal building, a satisfactory thermal environment was achieved in the occupied zone. Similarly, Li et al (Li et al, 2009) investigated different air distribution designs to optimize the thermal environment in a train station building with a high ceiling level. The numerical results indicated that satisfactory thermal comfort in the occupied region was realized using a stratified air distribution design and supplying air at midheight horizontally.…”

Experimental and numerical study of a small-scale and low-velocity indoor diffuser for displacement ventilation: Isothermal floor

“…For the sake of simplicity, the diffusers are installed equispaced, and little attention has been given to the general air distribution. Though this problem is very complex due to the nature of the flow (non steady, turbulent state with relatively high vertical temperature gradient in large areas), there are different turbulent models to achieve three-dimensional simulations successfully in a whole building [30]. However, these simulations are too time consuming, as the different boundaries and scales must be solved accurately [31], even by using nonlinear RANS models [32].…”

A Novel Design for a Fluorescent Lamp With an Air Cleaning Function and Better Lighting Efficiency

“…In general, CRI of the fluorescent lamp is about 80-95 and acceptable. Furthermore, the fluorescent lamp has the advantage of lower heat dissipation compared with incandescent lamp such that the air-conditioning load can also be reduced (American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 2009;Li et al 2009b), more uniform-distributed emitting light compared with LED such that direct glare can be avoided, and a reasonable price that is the determinant issue for the consumer. Although the fluorescent lamp has the drawback of containing mercury that pollutes the environment, the mercury contained in the fluorescent lamp has been reduced from 100 mg in 1980 to 10 mg in 2007, and further down to 3 mg (Devonshire 2008;Fagerhult Lighting 2010).…”