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Situated in the heart of London, 5 Broadgate is a new build property adjacent to Liverpool Street Station and will become the new home of UBS financial services when they take occupancy in 2016. The building also offers additional commercial and retail opportunities.
The 12-storey building has been designed with a clear sustainability strategy including 700 square feet of green roof space, 242 square feet of plantations, waste management, integrated solar shading and insulation, and a 138.24 kWp roof-mounted solar PV system; collectively, it is anticipated that the building will achieve an ‘excellent’ BREEAM rating.
The contractor, Mace Group, turned to EvoEnergy to design and deliver the solar PV system solution on a purpose built steel frame, 4m above roof level, that also sat above the buildings ventilation units and building management systems.
One particular technicality that EvoEnergy had to consider was that part of the building, by law, was restricted to a maximum height of 75 metres due to the fact that no structures/trees can obstruct the view of St Paul’s Cathedral when stood on King Henry’s (VIII) Mount, some eight miles away (the line of sight must be unbroken to pay tribute to the folklore story of King Henry viewing a rocket launched from the Cathedral to know when his wife had been executed for treason, so he could marry Lady Jane Seymour).
As the building was already within inches of breaching the 75m height restriction, EvoEnergy had to design a system knowing that the maximum angle the panels could be installed at could be no greater than 5 degrees. With the design of the steel frame in mind, EvoEnergy subsequently innovated and installed a system consisting of 576 Panasonic 240Wp panels using a bespoke SunFixing mounting system that consisted of four different types of mounting solutions.
Materials were delivered to the roof using a goods lift that was accessed underneath the building, although strict timed deliveries were enforced meaning constant co-ordination with security was necessary to ensure materials were moved through the process efficiently and on time.
James Sutton, Project Manager for EvoEnergy, commented;
“The finished product not only represents a remarkable feat of engineering by incorporating a uniquely bespoke PV system on one of the most striking building in the banking quarter of London, but also sends a message that no matter how crowded a roof may be, there are ways and means to negotiate any obstacle or obstruction to promote renewable energy at a time when we should be thinking about the environment with every step towards new constructions.“
The ten man team installed the system over a phased installation spanning 6 weeks and had to use rope access and tension lines to manoeuvre the complex steel rooftop structure; health and safety, as always, was of paramount importance.
The 138.24 kWp solar PV system is expected to generate 108,104 kWh every year for the benefit of the tenants and will also produce over 57 tonnes of CO2 savings annually.