Investigation of varying louver angles and positions on cross ventilation in a generic isolated building using CFD simulation

Tai, Vin Cent; Kai-Seun, Joseph Wu; Mathew, Prasath Reuben; Moey, Lip Kean; Cheng, Xinwei; Baglee, David

doi:10.1016/j.jweia.2022.105172

Cited by 19 publications

(12 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar finding on the pressure contour where the static pressure will decrease slightly as the airflow and identical compression region was discovered at the window opening [24]. An identical airflow pattern was obtained for louvres opening at the inlet and outlet, as shown in Figure 7, where the wind is directed upward, and a region of low velocity is formed just under the airflow path [18,25].…”

Section: Internal Thermal Comfort Analysissupporting

confidence: 72%

“…Figure 12 shows the air velocity contour at the mid-plane of the classroom at 0° louvre (fully open). The simulation results are supported by Vin Cent et al, [18]. Hence, a greater thermal comfort level can be achieved as this provides an even distribution of wind to the occupants in the room.…”

Section: Design Optimisation 331 Operable Window and Its Anglesupporting

confidence: 61%

“…While experimental investigation on the performance of wind-driven ventilation is viable through wind tunnel experiments, it is often that researchers use Computational Fluid Dynamics (CFD) as an alternative method to perform virtual experiments as it is more costeffective and it provides accurate results analogous to model testing. For example, Bangalee et al, [16] used CFD to simulate the flow pattern inside and around a full-scale single-story building with multiple windows, mimicking the actual wind tunnel experiments using the virtual computational domain, Cheng et al, [17] suggested using CFD to find the relationship between ventilation coefficients and building parameters and form empirical equations that anticipate the natural ventilation potential, while Tai et al, [18] investigated the effect of louvres window position and the angle of louvres affecting the performance of natural cross ventilation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Natural Ventilation and Indoor Air Quality in Domestic School Building: CFD Simulation and Improvement Strategies

Adryan Seng Theng Ang,

Charlie Chin Voon Sia,

Yee Lee Yeu

et al. 2023

CFDL

View full text Add to dashboard Cite

Natural ventilation is a process of replenishing used air from the interior environment with fresh outer air without the use of mechanical equipment. This project aims to investigate the feasibility and performance of implementing natural ventilation in dilapidated classroom designs of actual geometry. Computer models of an existing classroom were created using SOLIDWORKS based on real-scale building floor plans, while the same software was applied to compute flow simulation studies to visualise the airflow pattern, temperature distribution, relative humidity, and the thermal comfort level of occupants in the classrooms. Estimated climate parameters were input in the simulation process to illustrate better the effect of hot and humid climate conditions in Malaysia towards the thermal comfort level of occupants. In this project, a visualised wind tunnel was created to simulate the prevailing wind source that supplies wind to the designed classroom, and the airflow pattern across the designed building was analysed. From the initial simulation results, it was discovered that the airflow into the classroom is uneven, whereby some locations in the building are experiencing extremely low wind breeze, which eventually affects the comfort level of occupants in the room. On the other hand, an internal analysis focusing on the interior comfortability of the classrooms was applied to examine the thermal comfort condition while using the naturally ventilated classrooms. Recommendation optimisation approaches such as the louvre angle and introduction of a windcatcher was presented in this project to improve the natural ventilation performance of the designed classroom.

show abstract

Section: Internal Thermal Comfort Analysissupporting

confidence: 72%

Section: Design Optimisation 331 Operable Window and Its Anglesupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Natural Ventilation and Indoor Air Quality in Domestic School Building: CFD Simulation and Improvement Strategies

Adryan Seng Theng Ang,

Charlie Chin Voon Sia,

Yee Lee Yeu

et al. 2023

CFDL

View full text Add to dashboard Cite

show abstract

“…Kosutova [18] conducted a study on the impact of louvers with varying positions and fixed angles in buildings with flat roofs on natural ventilation. Building upon this foundation, Tai [19] conducted research on the impact of louvers with different positions and angles in buildings with flat roofs on air exchange efficiency. He also proposed optimization factors to measure the relationship between AEE and DFR.…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis of Building Cross-Ventilation with Different Angled Gable Roofs and Opening Locations

Shi,

Zhao,

Liu

2023

Buildings

View full text Add to dashboard Cite

The geometric shape of the roof and the opening position are important parameters influencing the internal cross-ventilation of buildings. Although there has been extensive research on natural ventilation, most of it has focused on flat or sloping roofs with the same opening positions. There is still limited research on the impact of different opening positions and sloping roofs on natural ventilation. In this study, computational fluid dynamics (CFD) was used to investigate the air exchange efficiency (AEE) in general isolated buildings. These buildings encompassed three distinct opening configurations (top–top, top–bottom, and bottom–top) and six varying slope angles for gable roofs (0°, 9°, 18°, 27°, 36°, and 45°). Computational simulations were carried out using the SST k-omega turbulence model, and validation was performed against experimental data supplied by the Japanese AIJ Wind Tunnel Laboratory. Grid independence validation was also conducted to ensure the reliability of the CFD simulation results. The study revealed that the highest AEE was 48.1%, achieved with the top–bottom opening configuration and a gable roof slope angle of 45°. Conversely, the lowest AEE was 31.4%, attained with the bottom–top opening configuration and a gable roof slope angle of 27°. Furthermore, it was observed that when the opening configuration was set to top–top and bottom–top, the slope angle of the gable roof had minimal influence on AEE, with an average AEE of only around 33%. When the opening configuration was top–bottom, it was found that there was a positive correlation between the gable roof slope angle and AEE.

show abstract

“…Consequently, this study can be used to improve natural airflow rates in other buildings with interior corridors in their designs. Tai et al (2022) performed a numerical study using computational fluid dynamics on cross ventilation for a building equipped with louvers. Shutter configurations without louver and with different angles were determined as variables.…”

Section: Introductionmentioning

confidence: 99%

Bi̇r Savaş Gemi̇si̇ Kompartimaninda Hvac Si̇stemleri̇ni̇n Sayisal İncelenmesi̇: Doğal Havalandirma Ve İkli̇mlendi̇rme

ACAR,

URYAN,

DOĞRUL

et al. 2023

Journal of Naval Sciences and Engineering

View full text Add to dashboard Cite

HVAC system design and optimization of the ventilation and air-conditioning of indoor environments are crucial for human comfort. Especially in recent years, due to the Covid pandemic, the importance of this hot topic is noticed. This study aims to focus on the HVAC performance of a dorm compartment onboard a naval surface ship since the ship environment is a good example of indoor air ventilation problem. The HVAC performance was investigated using a RANS solver. The numerical analyses were conducted for different scenarios and the results were finally discussed in terms of HVAC system location, air temperature, air intake and outlet conditions. As a conclusion, the current HVAC system design was found insufficient and alternative solutions were proposed in order to improve indoor air quality and thermal comfort.

show abstract

Investigation of varying louver angles and positions on cross ventilation in a generic isolated building using CFD simulation

Cited by 19 publications

References 20 publications

Natural Ventilation and Indoor Air Quality in Domestic School Building: CFD Simulation and Improvement Strategies

Natural Ventilation and Indoor Air Quality in Domestic School Building: CFD Simulation and Improvement Strategies

CFD Analysis of Building Cross-Ventilation with Different Angled Gable Roofs and Opening Locations

Bi̇r Savaş Gemi̇si̇ Kompartimaninda Hvac Si̇stemleri̇ni̇n Sayisal İncelenmesi̇: Doğal Havalandirma Ve İkli̇mlendi̇rme

Contact Info

Product

Resources

About