NEWS 25ADF JUNE 2019 WWW.ARCHITECTSDATAFILE.CO.UK
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t. Helena, one of the world’s most
remote island locations is using
actuators, monitoring and control
solutions from SE Controls Africa as part
of a new hybrid environmental ventilation
and smoke control solution at its airport
terminal on the East coast.
A British overseas territory, alongside,
Ascension Island and Tristan da Cunha,
St. Helena’s airport is operated by St. Helena
Airport Ltd and currently receives a weekly
flight from Johannesburg, South Africa.
Handling around 400 passengers each
week, the airport terminal’s ventilation
system is designed to monitor and control
both temperature and carbon dioxide (CO 2 )
levels, to help maintain a comfortable
environment for travellers and staff, while
also ensuring that escape routes are kept free
of smoke in the event of a fire.
To achieve this, 46 SE Controls SECO N
24 40 chain actuators with a 600mm stroke
length automatically open and close theairport terminal’s windows and vents,
depending on the CO 2 concentration and
interior temperature, which is monitored by
four combined sensor and control units
located in different zones within the building.
External rain, wind and temperaturesensors are also installed as part of the system
to ensure that only ‘down wind’ vents are
opened to remove the risk of rain entering the
building in windy conditions.
If a fire should occur, the building’s alarm
system triggers the ventilation system to
switch into smoke ventilation mode, which
automatically opens high level vents while
also allowing replacement air to enter the
terminal at low level to ensure that smoke can
be quickly vented from the building and keep
escape routes clear.
In smoke ventilation mode, the actuators
are controlled by five separate SE Controls
SHEVTEC controllers, which are fully
compliant with all relevant fire safety
regulations and international product
manufacturing and testing legislation.
The SHEVTEC controllers also include a
battery back up for failsafe operation even in
the event of a mains power failure.01543 443060 http://www.secontrols.comSE Controls high ying hybrid ventilation and
smoke control for St. Helena Airport