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Technical Focus

may not be enough to meet the building’s daily needs, the system draws upon this stored heat.

Storing energy in the earth

An integrated system carefully measures the temperatures within the property and its hot water cylinders

The EEB itself consists of a matrix of boreholes that are just 1.5m deep

Housed between a building’s foundations, the Earth Energy Bank’s design utilises the poor thermal conducting qualities of the ground, so heat will only escape slowly, as the sides and top are insulated.The EEB itself consists of a matrix of boreholes that are just 1.5m deep and are arranged in the ground within the building’s foundations. It offers several advantages over traditional ground or air-source systems. Firstly, when drawing upon the EEB, the heat pump operates more efficiently, as the raised ground temperature creates a lower differential between the source and output temperatures. Secondly, the EEB requires no deep bore holes or long ground loops. Installation can consequently be completed without the use of specialist drilling equipment or additional space, ensuring significant cost savings. With the electrical energy generated from the PV-T array enough to power the system, buildings using the Zero Carbon Solution are able to remain entirely self sufficient for space heating and hot water all year round – a concept that offers a lot of potential for the building industry.

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FC&A July 2015  

FC&A July 2015