Energy from the ground will heat and cool a school — and provide hot water

16 December, 2006

As part of preparations for one of the largest ground-source heat-pump applications in the UK, test boreholes are drilled on a site about a mile from the centre of Sheffield.

One of the largest ground-source heat-pump projects in the UK will provide heating, cooling and hot water for a school in Sheffield. Capable of supplying over 200 kW, the system has been designed by Eco Heat Pumps for Sharrow School and will serve new extension buildings which amalgamate nursery, infant and junior schools into a single entity. A water-glycol mix will be pumped through pipework in a large array of 90 m-deep boreholes. At this depth, the temperature averages 10°C, and heat pumps extract heat to serve space-heating and DHW systems. Thermia Robust heat pumps are used by Eco for such large-scale projects. The have a potential COP of 5:1 and feature a sub-cooler, de-superheater and quiet-running scroll compressor. Average seasonal performance for space-heating is expected to be 4:1 and 2.8:1 for DHW. Passive systems will be used for cooling, so the COP will be over 100:1.

For more information on this story, click here:Dec 06, 74

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