Case study
International Worship Center, Nigeria
Background
The International Worship Center, a new construction project in Uyo, Akwa-ibom, Nigeria, wanted to optimize air dispersion within its expansive 9,000 square meters multipurpose facility. The space can accommodate up to 5,500 visitors for religious and state events, library services, offices, and conference halls. With a concrete and steel structure featuring distinctive architectural elements, conventional metal ductwork posed limitations in providing efficient air distribution.
Combi 30
Type 01
56,000 m3/h
JetFlow™ and MicroFlow™
Solution
To address the air dispersion challenges in this immense structure, the facility opted for an innovative solution by installing FabricAir ducts. The Combi 30 fabric, in a subtle, light grey color, ensured a seamless aesthetic blend with the modern aesthetics of the structure. MicroFlow and JetFlow flow models were strategically employed to optimize air distribution to enhance indoor air quality, comfort and ventilation throughout the space. The ducts were suspended from the ceiling using FabricAir’s Type 1 single cable suspension system, with 50mm straps and hooks for secure and clean appearance.
A CFD analysis conducted by the FabricAir engineering team aimed to predict and evaluate the air dispersion system’s performance prior to installation. The simulation focused on ensuring the selected flow model(s) suitability, with a goal of even air dispersion, draft-free areas, proper mixing, and a homogeneous temperature.
Engineering Details
FabricAir ducts provided sufficient air movement with proper induction and no uncomfortable drafts in the occupied zone of the 125m by 56m and 30m high ceiling.
The installed air dispersion system consists of four runs of Ø1040 mm ducts in various lengths and shapes, positioned in a symmetrical pattern. Airflow is distributed through MicroFlow and JetFlow at the 6:00, 4:30, and 7:30 (o’clock) positions. The system operates at a static 150 Pa pressure, delivering a total airflow of 14,000 m3/h per duct. The supply air temperature is 18.7°C, maintaining a comfortable temperature 6.3°C lower than the intended room temperature of 25°C.
Results
The final, installed solution successfully ensures even air dispersion across the room, reaching all areas of the conditioned space. Air velocities create sufficient mixing in the occupied zone, staying below 0.25 m/s in most areas and not exceeding the recommended 0.5 m/s. With an average air velocity of 0.2 m/s in the occupied zone, the design ensures ample air movement, providing a pleasant draft-free environment without stale air zones.
Zion Assedo, Project Manager at ETCO Nigeria, the engineering company assigned to the project was pleased with the final results. “Choosing fabric ducting for the church project in Nigeria was a game-changer. Even airflow eliminated hot spots, providing consistent comfort. Not only did it blend seamlessly with the building’s design, but its low maintenance, sound-absorbing qualities, and energy efficiency made it a top choice. The installation was very easy, saving time and costs while ensuring a healthier indoor environment.”
Temperature analysis confirms a homogeneous temperature across the space, with a temperature gradient of less than 1°C in the occupied zone. The suggested air dispersion design ensures thermal comfort without drafts, contributing to good indoor air quality.
Additional Information
Learn more about FabricAir ducts for houses of worship
Beyond metal: Exploring remarkable applications for fabric ducts
