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Low energy thermal mass projects

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An exemplar thermal mass building using embedded water pipes in pre-cast coffered structural slabs for comfort conditioning. The building makes use of the thermal energy storage capacity of the structure. As well as the exposed thermal mass the building has a mixed mode mechanical and natural ventilation strategy. The system uses a cooling pond to deliver passively cooled water to the slabs with the aim of keeping the slabs at around 20 degree C.

Tests had been carried out by BSRIA to confirm the cooling power of the slabs and the cool storage

IFDS (Formerly Basilica) Building, Basildon

Client:  Barclaycard Property Holdings

Architect:  Fitzroy Robinson

Contractor:  Tilbury Douglas

Consultant:  Troup Bywaters & Anders

Total Project Value:  £15.2 Million

Completed:  1998

effect which showed that as a minimum 64 W/m2 of cooling power was achievable.

The natural ventilation strategy is used both as a means of providing the ventilation air as well as for night time cooling. The central atrium is a key factor in naturally ventilating the building as it provides the exhaust route for the return air path.

When conditions dictate, the natural ventilation and passive design features are complemented by the mechanical systems of the building, the aim being to operate powered systems for the minimum amount of time at minimum energy use consistent

with maintaining conditions. For cooling, a hierarchical strategy is used to minimise energy use as follows:

An exemplar thermal mass building using embedded water pipes in pre cast coffered structural slabs for comfort conditioning. The building saves around 25% energy when compared to comparable buildings.

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