SCHOOLS & EDUCATION FACILITIES SUPPLEMENT NEW-BUILD ACADEMY AQUIFER THERMAL ENERGY STORE SYSTEM


4 2 3 1 5


1 ‘Warm’ bore hole, charged the previous summer, supplies warm water to the building at around 14C


2 Warm water from bore hole raised to 50C by high coeffi cient of performance heat pump – which cools the water taken from the warm bore hole


3 Water returned to charge ‘cold’ bore hole at around 8C 4 Water into ‘cold’ bore hole – charges cold store for the following summer 5 Distribution pipework carries warm and cold water


1 Charging of ‘warm’ bore hole with water warmed by cooling the building – stores heat for the following winter


2 Water at around 15C discharged to ‘warm’ bore hole


3 Water at around 10C supplied to building at coeffi cient of performance of up to 25%


4 ‘Cold’ bore hole supplying cool water to buildings


5 Distribution pipework carries warm and cold water around site between buildings and bore holes


We’ve worked with FCBS not just to provide good daylight factors but to create interesting patterns that can be inspirational to children


expected to rise as more and more technology comes into classrooms. ‘This way, we’ve been able to include an element of future-proofi ng into the building,’ says Muhsinovic. He adds that high-level IT usage could see a heat output of 1,500 W in a typical classroom, so it would be possible to pump more coolth – heat used for cooling – into the building, if necessary. The sponsor’s aspiration to create an


inspirational experience within the space meant the approach to daylight stretched beyond good daylight factors in the classrooms –3% to 3.5% – to bring light and shade into the heart of the school via a network of lightwells and glazed atria. ‘We’ve worked with FCBS not just to


provide good daylight factors but to create interesting patterns that can be inspirational to children,’ says Muhsinovic. Certainly, despite the surroundings, the way the building looks inwards gives an almost courtyard feel and the light bounces attractively around the glazed rooftops and atria. Artifi cial lighting is


18 CIBSE Journal March 2012


Figure 2: Open-loop boreholes have been sunk to create an aquifer for use as a thermal energy store. The diagram combines winner and summer illustrations


daylight-linked and is combined with presence detection to further reduce unnecessary energy consumption. Although open since September 2010, it is


only in the 2011 academic year that Chelsea Academy has been at full occupancy. ‘The building is performing as we expected,’ says Muhsinovic, ‘and the client is very happy with the way the building behaves and operates. What’s more, the students are highly appreciative of their surroundings.’ As you would expect with any new build, a


few tweaks have sorted out any initial teething problems. With the rooftop very much part of the general circulation routes around the school, there was a problem with draughts rushing through the building on windy days. This has been easily solved by more robust door closures to the roof. ‘We didn’t want to have to resort to overdoor heaters,’ says Muhsinovic. The main reception area also proved to be


somewhat exposed and that has since been enclosed a little more. There can be no doubt that inspirational surroundings spark creativity in pupils, and the building services design is no different. ‘At the opening ceremony, we were given a tour of the building by pupils and they had a very good grasp of how the building is intended to operate in terms of the ventilation strategy, controls and the energy issues,’ says Muhsinovic. Let’s hope the academy inspires some


budding building services designers of the future. CJ


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