Stonewater Ground Source Heat Pump ESO Pilot

A local energy system demonstrator project aiming to evidence how ground source heat pumps with smart heating controls can reduce heating costs for residents, whilst also lowering carbon emissions, is officially underway in Oxford.

Leading housing provider Stonewater has partnered with Kensa Contracting to have 60 of its homes at Blackbird Leys installed with Kensa’s innovative low carbon heating solution.

Individual Kensa Shoebox ground source heat pumps in each property, connected to a communal ground array, will integrate with smart controls and time-of-use tariffs to optimise heat production for cost and carbon savings.

The heat pump installations form part of Energy Superhub Oxford (ESO), a world-first project showcasing an integrated approach to decarbonising power, heat, and transport across Oxford. Supported by Innovate UK, ESO is led by consortium partners Oxford City Council, Pivot Power, Habitat Energy, Kensa Contracting, Invinity Energy Systems, and the University of Oxford.

The renewable heating scheme with Stonewater is the first phase of Kensa Contracting’s aim to pilot the smart technology in 300 homes around Oxford over the next two years under the ESO project.

ESO aims to demonstrate how ground source heat pumps with smart controls can help balance the electricity grid as part of an integrated local energy solution that also includes grid-connected batteries and smart electric vehicle charging. This innovative project sets out a clear blueprint to enable a significant increase in the deployment of heat pumps as part of the mass decarbonisation of the grid.

Leon Storer, Assistant Director – Capital Investment at Stonewater, said:

We’re delighted to be a part of this innovative and forward-thinking project, supporting the local authority in achieving a net zero carbon future.

By replacing our residents’ current high carbon night storage heaters with Kensa’s ground source heat pump systems, we’re able to not only work towards a more sustainable future, but an economical one too. This is because a benefit of transitioning to this type of heat pump system is the significant cost savings it provides for residents.

Dr Matthew Trewhella, Managing Director of Kensa Contracting, said:

Kensa is delighted to partner with Stonewater for the first phase in this 300 property pilot ground source heat pump project.

The residents will benefit from clean, renewable heat with demonstrable savings expected from the combination of smart controls and automated load shifting.

In this case, smart meters enable residents to switch to Octopus Agile, an experimental flexible tariff which varies the electricity price every half hour and optimises energy use when renewable power is prevalent on the grid.

Internet connected ‘Switchee’ smart heating controls will automatically run resident’s heating systems at the lowest cost times to reduce their bills while maintaining their comfort levels, and caring for the environment.

This is a set up that can be replicated in other ground source heat pump projects across the country to support mass decarbonisation and further electrification of the grid.

Despite delays to commence as a result of coronavirus, Kensa expects to complete the installations across the Stonewater homes before winter 2020.

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