Key Parameters to Confirm When Selecting Electric Operable Ventilation Skylights for Steel Structure Buildings
Release time：
Electric operable ventilation skylights can help steel structure buildings achieve natural ventilation, cooling, and smoke exhaust. Overlooking core parameters during the selection process can easily lead to insufficient ventilation efficiency, roof overloading, or equipment failure. Among these, four major parameters require careful confirmation: ventilation area, throat opening size, self-weight load, and motor power.
1. Ventilation Area must be matched to the building's actual needs and should be calculated based on building volume, process heat generation intensity, and personnel density. For example, for a 3,000 m² machinery workshop requiring 6 air changes per hour, the total required ventilation volume should be calculated based on the building height. This volume is then used to determine the installation requirements (e.g., throat opening size, number of units) by referencing the skylight's "effective ventilation area per linear meter," thus avoiding ventilation dead zones or wasted energy.
2. Throat Opening Size needs to be compatible with the roof structure and ventilation efficiency. Common specifications range from 600mm to 12,000mm. Selection should consider the steel roof's purlin spacing. For instance, with a 3m purlin spacing, a throat opening between 1500-3000mm is suitable. This ensures precise alignment with the roof purlins during installation while optimizing airflow velocity through an appropriately sized throat, preventing increased ventilation resistance due to an overly narrow opening.
3. Self-weight Load relates to roof structural safety. The weight per linear meter of ventilation skylights typically ranges from 120-590kg (e.g., 150-590kg/m for TC2B type). Before selection, the load-bearing capacity limit of the steel roof structure must be clearly defined. The combined load of the skylight's self-weight plus local snow load (0.2-0.4 kn/m²) and wind load (1.0-1.2 kpa) must not exceed the roof's designed load-bearing capacity to prevent deformation or collapse.
4. Motor Power and Electrical Control Configuration are crucial for stable operation. A standard single electric control box typically has a power rating of 1.5 kW, with an input voltage of AC220V 50Hz and output voltages covering AC220V and DC24V, compatible with actuator requirements (rated current 0.56A). Control boxes for slim skylights can also operate up to 12 electric damper panels. The number of control boxes should be determined based on the quantity of skylights and damper panel groups to avoid overloading a single unit and to ensure synchronized, smooth opening and closing actions.
In summary, these four parameters are interrelated and must be confirmed comprehensively based on the building's operational conditions and structural constraints. The data in this article references the 18J621-3 "Ventilation Skylights" standard drawing set, which can be downloaded through the link https://www.mcwell.net/companyfile/4.html.
info@mcwell99.com
+86 13881905158