Effects of the wind speeds on heat transfer in a street canyon with a skytrain station

Abstract

The street under a skytrain station can be seen in many urban cities. Due to the cavity geometry of the street canyon, natural ventilation is decreased. The reduction of the ventilation causes the heat accumulation in the street canyon. To keep the thermal climate at an acceptable level in the street canyon, controlling the air movement with proper temperature is important. In this paper, mathematical models of air flow and heat transfer in the skytrain street canyon are developed. The governing equations are the Reynolds-averaged Navier-Stokes equations and the energy equation. Finite element method is applied for the solution of the problem. The effect of wind speeds on temperature distribution in the street canyon is investigated. Three levels of wind speed including gentle, moderate, and strong wind speeds are chosen in this study. The results indicate that our model can capture the air flow and temperature distribution within a street canyon with a skytrain station.

Experimental evaluation of the wind convection heat transfer on the glass cover of the single‐slope solar still

“…The wind convection heat transfer coefficient is of great importance in several research fields, such as building energy analysis, 1 research on animal and plant biology, 2,3 environmental sciences, 4 and energy systems research 5–8 . Appropriate estimation of h w is essential for solar‐based systems.…”