Case Study
BEG cleans up with smartphone-accessible lighting controls solution for Dyson
T
he 10th and newest engineering department at the Imperial College in London was established thanks to a
£12m donation from the James Dyson Foundation.
Opened by George Osborne, the Chancellor of the Exchequer, and inventor and industrial designer Sir James Dyson in 2015, the school was launched to help the next generation of much-needed graduate engineers and technology leaders. BEG Lighting Controls were selected by ICL to
provide a user-friendly system, which could be maintained by their own maintenance department and meet the lighting control standards required by the research university. The lighting controls manufacturer worked with mechanical and electrical consultants, Buro Happold, who were tasked to oversee the project and ensure that the system achieved the best solution for ICL. ICL’s main criteria was that the project had to
result in energy cost savings for the University for the various areas of the Dyson School department and take advantage of any natural daylight. This included the teaching rooms, laboratories, offices, corridors, stairwells, toilets and store rooms. BEG Lighting Controls and Buro Happold worked on the layout of the lighting as well as the level of light and type of control required for these areas. Tom Greenrod, Specification Director at BEG Lighting Controls, said: “The design brief from the Imperial College London meant we had to carefully specify lighting controls products for each area which differed greatly from room to room so this was by no means a ‘one size fits all’
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solution. It was imperative that the lighting was mostly switched on in the offices and teaching rooms during working hours and that it could be controlled to reduce lighting levels when the natural daylight was brighter. For the laboratories, we used DALI photocells instead of occupancy sensors. “Areas such as the corridors, stairwell, toilets
and store rooms did not need to be fully lit and lighting only need to be switched on once our occupancy sensors sensed there was a person or persons in the room. It is in these areas, naturally, that the most energy consumption could be saved so it was vitally important we selected the right products for these areas. Due to the extensive range of BEG DALI Broadcast Occupancy Sensors we have available, we were able to offer a suitable sensor for all sections of the building.” The luminaires selected on the project were
DALI dimmable and daylight harvesting was to be achieved mainly for the light fittings adjacent to the windows. For these areas, the BEG DAA4G Occupancy Sensor was chosen, as this sensor could be programmed so that the window luminaires were dimmed by 25 per cent to the main room. If the sensor’s photocell detected any change in the level of natural daylight then all luminaires would adjust accordingly. This sensor was specifically used in the teaching rooms, where up to four lighting zones could be set; one being the whiteboard and then up to three zones for the classroom. A two-gang retractive switch would control the
whiteboard and the main classroom lights. Programming of the sensor was achieved using a
BEGcleans up with smartphone-accessible lighting controls solution for Dyson
The Dyson School of Design Engineeringhas increased its energy efficiency aſter having a new easy-to-use BEG lighting controls system installed, which the maintenance team can control themselves via their smartphones.
smart phone with the BEG Lighting Controls app and Infra-Red adaptor. This app also allows remote programming of all of the DALI sensors used on the project.
The only mains fitting on the project was a
feature chandelier in the main stairwell as Greenrod explained. “This needed to be controlled by occupancy sensors together with the DALI luminaires,” he said: “We solved this by using their sensor with a DALI and switching output. This sensor was also used in the toilet areas where the lighting and the extraction fans required occupancy control. The DALI would control the luminaires and monitor any natural daylight whereas the fan was controlled independently and worked on occupancy detection only. In laboratories, occupancy sensors were not
required as ICL wanted to avoid the possibility of lights turning off which could be considered unsafe depending on the type of experimental work being carried out. In these rooms, the BEG DALI photocell was used to control the window row of luminaires to provide some level of energy saving. Greenrod added: “The main considerations
were whether the sensor needed to be in presence or absence mode, if manual switching was required and the wiring of master and slave sensors. These meetings ensured that a smooth trouble-free installation was achieved. Once the all the sensors had been installed, BEG Lighting Controls was on site to provide a commissioning certificate. We also gave sensor programming training to the University’s maintenance team who were a pleasure to deal with.”
beg-luxomat.com April 2019 electrical wholesaler | 5
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