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on site and the renewable energy strategy. These features are aimed at drastically reducing energy use and carbon emissions for the development, as well as offering reduced running costs and supporting the development of low carbon buildings in the region.
Expected energy demand and peak load details have been estimated for the development. The early design stage means these figures may be revised, but represent the most up-to-date design and estimations available.
Although dynamic thermal modelling has not yet been undertaken for this building, the demands and loads have been estimated by considering the main centres of demand, load profiles, occupancy rates, weather data,
services strategy and energy efficiency measures. The estimated demands are given in Table for a base building i.e. the current design WITHOUT any integrated renewable energy supply. The figures are also given for
the full design, which includes a ground source heat pump system. This offers an indication of the energy saving realised by the heat pumps.
It can be seen that the Aylesbury design is significantly better in terms of energy use than the benchmarks. It should be noted that these benchmarks actually date from 1994, and the building regulations and available energy efficiency technology have evolved considerably since then. In addition, these figures do not state the extent of “additional” floor area considered e.g. the amount of circulation space, bar areas, foyers, office and meeting rooms considered. However, even allowing for these facts, Aylesbury Theatre and Entertainment Centre exceeds the good practice figures and this is due to the extensive use of energy efficiency measures and renewable energy technology.
Aylesbury Theatre and Entertainment Centre will be designed with a renewable energy heating and cooling system at its core. Ground source heat pumps have been selected due to their ability to meet a large proportion of the heating and cooling demand, their minimal architectural and visual impact, minimal noise generation and excellent carbon reductions.
Four, 90kW heat pumps are to be placed in the plant room, providing the base load for the main, low temperature heating circuit. In summer, they will reverse and provide all the artificial cooling for the auditorium and large meeting room.
They will be linked to an underground pipe network which will absorb and reject heat to the ground. The pipe network itself will be embedded in the building’s structural piles, each extending 25-30m below the surface. This reduces costs as no boreholes are needed and removes the need to dig large numbers of horizontal trenches.
Overall, it is estimated that the heat pumps will reduce carbon emissions onsite by at least 10%.
Conservation of Fuel and Power
In line with the new Part L Regulations, of the Building Regulations that came into force on 6 April 2006, the preliminary Dynamic Thermal Model of the Theatre has been developed. Using recorded metrological data, the computer generated 3D model enables theatre energy performance to be accurately analysed and optimized over an operational year in order that heating, cooling, lighting and ventilation demands can be minimised.
This modeling approach has enabled the design and servicing strategy to be developed in confidence that overall energy efficiency will meet the strict Part L requirements. Essentially the carbon emissions (kg/C