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Ground source heat pumps aim to save 250 tonnes of CO2 a year

Initial groundworks have been completed at a large heat pump installation at St George’s College Weybridge in Surrey, where 132 boreholes in the playing fields are set to save about 250 tonnes of CO2 a year.

Managing contractor ReEnergise is installing the system as part of its Zero-Carbon Schools Initiative. The school’s Estate Manager, Errol Minihan is spearheading a future-proof approach to reducing the school’s reliance on fossil fuels. The system sees the installation of four 230 kW Viessmann Vitocal 300-G Pro ground source heat pumps, which replace the school’s previous gas heating system in an adapted plant room in the college’s Kean Building complex.

Steve Faucherand, chief executive of ReEnergise, said, “It’s a pleasure to work with St George’s College, who are always forward-thinking and have been on the low-carbon journey for some time. This is a major investment in zero-carbon technology that will give them options as they develop the College estate. We are already working with them to maximise the benefit of the system and increase its sustainability by utilising its capability to cool classrooms in the summer and return excess heat to the ground.”

St George’s College, founded in 1869, is an independent Catholic day school for 11-18 year olds with around 1,000 students.

The Viessmann heat pumps will be installed by Aston Cord Energy Services, which has also offsite-prefabricated the 10 inch diameter distribution header into which the borehole loops and the heat pumps will be connected.

The borehole drilling has been undertaken by Oxfordshire-based AW Synergy.

The Zero-Carbon Schools initiative currently supports 50 schools and colleges to optimise projects at various stages of the decarbonisation process.

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