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M&E, ENERGY AND BUILDING PHYSICS

Jubilee Wharf had not only to make a step change in its response to climate change, but also to do so at an appropriate cost. While larger projects are able to support the added design time for delivering innovation, smaller schemes inevitably bring hard choices between investment in design or in construction. The approach adopted here was to use an experienced design team which had previously delivered all of the technologies, thereby minimising design time. Arup's primary role involved concept design work, preparing a detailed set of employer's requirements and thereafter acting as troubleshooter for the team. The prerequisites for this lighter design touch included: using only design aspects thoroughly tested by the same team on previous projects; specifying specialist suppliers who have a proven design capability (as opposed to choosing them based on lowest cost); and having an architect with sufficient experience of the technical aspects to act as the team's eyes and ears on site. While it would be nice to have analytically quantified such aspects as the wind turbine annual energy yield for this location, the priority went into getting the right order of magnitude of energy saving and renewable-energy generation, leaving more funds for buying the systems. Jubilee Wharf is expected to achieve very low energy demands, of the order of 50kWh/m². This involved the application of super-insulation levels; exceptional envelope airtightness; wind-powered heatrecovery ventilation to avoid fan power; low hot-water-demand - ttings; and close specification of maximum installed electrical demands. With the aim of achieving a zero carbon rating, this was then matched to four 6kW wind turbines, a 75kW wood-pellet boiler with heat stores, and solar hot-water systems. Wiring is installed ready for the future installation of micro wind turbines and PV.

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