Page 123 - JCAU-6-4

Journal of Chinese
Architecture and Urbanism Indoor wind environment in buildings for Qinghai-Tibet plateau of China

3.5. PHOENICS simulation results barriers, the airflow can move smoothly from the windows
on the north side into the south courtyard.
The numerical simulation results are illustrated in
Figures 6 and 7. Under southeast wind conditions, the wind 4. Discussion
enters and exits through the south side of DSPH. The wind
enters the atrium through the south-side door and the gap 4.1. Architectural features affecting the wind
above it, creating an updraft in the atrium. A portion of environment of DSPH
the airflow also enters the interior of the building through This section outlines the main architectural features of
the south-side windows. In addition, a significant amount DSPH that contribute to the favorable natural ventilation
of airflow enters through the rooftop atrium, creating and the temperature and humidity conditions suitable for
circulation within the internal atrium. This circulation preserving the wooden scripture carving boards.
drives airflow throughout the building, with most of it
exiting through the north windows. The roof vents function 4.1.1. Building layout conducive to natural ventilation
as both air inlets and outlets. With an outdoor wind speed The DSPH has a good architectural layout, with a south-
of 1.5 m/s, the storage area for wooden scripture carving by-west-facing building orientation. The northeast winds,
boards achieves an average wind speed of 0.35 m/s, which entering primarily through the north-side windows,
falls within a comfortable range for human perception. Due facilitate the entry of fresh air into the building. In addition,
to the narrow tube effect, wind speeds in some areas, such as DSPH’s height is reduced on the sides facing the dominant
the convective vents and windows, can reach up to 1 m/s (as summer winds, making it easier for these winds to enter
shown in Figures 6 and 7). The simulation results indicate the building.
rd
th
nd
that the 2 , 3 , and 4 floors are well-ventilated, while the
1 floor, which houses the Dharma Protector’s Hall and the 4.1.2. Ventilation system to enhance airflow
st
Great Sutra Hall, experiences poorer ventilation with an On the 2 and 3 floors, the storage areas of the wooden
rd
nd
st
average wind speed below 0.1 m/s. Since the 1 floor is a scripture carving boards are strategically located near the
worship space and a densely populated area of the DSPH, north-facing windows. This placement allows for smooth
inadequate ventilation could lead to poor air quality, which air exchange with the upper spaces through air vents,
is detrimental to the health of the occupants. promoting better ventilation. Furthermore, these storage
As shown in Figure 8, airflow enters through the areas are designed with air exchange channels running in
windows on the north side and flows abundantly toward both horizontal and vertical directions, further enhancing
the south side. Due to the large space and fewer internal airflow.
Table 4. Comparison of wind environment simulation and field measurements

Parameter Outdoor Wind speed at 2 ‑floor Wind speed at 3 ‑floor Wind speed at
nd
rd
wind speed windows (m/s) windows (m/s) rooftop vents (m/s)
Measured 1 0.42 0.62 −0.31
Simulation 1 0.44 0.59 −0.28

A B

Figure 6. Wind speed cloud diagram of building surface. (A) Southeast axonometric map. (B) Northwest axonometric map. Source: Drawings by Zhong
(created with PHOENICS)

Volume 6 Issue 4 (2024) 9 https://doi.org/10.36922/jcau.2396