AIR SOURCE & GROUND SOURCE HEAT PUMPS
Decarbonisation projects to cut carbon emissions by 66%
South Norfolk Council and Broadland District Councils are embarking on three major decarbonisation projects which will see fossil fuel boilers replaced with low carbon heat pumps
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s part of the Councils’ Public Sector Decarbonisation project, funded by a £2million grant from Salix, Norfolk- based renewable heating specialist Finn Geotherm has
been appointed to remove the gas boilers in South Norfolk Council & Broadland District Councils’ new shared offices in Norwich and at Diss Leisure Centre, as well as a city-centre HMO (house with multiple occupation) facility managed by South Norfolk Council. The boilers be replaced with low carbon heat pumps. The project at the Horizon Centre, which commenced in December, will see two large scale Panasonic 210kW Air Source Heat Pumps (ASHP) installed by Finn Geotherm to provide all the heating, hot water and cooling for the 5000m2 shared offices located on Broadland Business Park in Norwich. The new ASHPs will cut emissions by 66%, saving approximately 50 tonnes of carbon a year - the equivalent to driving 461,700km in a small car, or taking 775 flights from London to Manchester. At Diss Leisure Centre, Finn Geotherm is
replacing the existing gas boilers with three 210kW ASHPs to provide all the facility’s pool and space heating and installing a further two 16kW heat pumps for hot water. This work is being undertaken as part of South Norfolk Council’s £4million modernisation and refurbishment project at the leisure centre. Work will be completed by March 2024, with the new heat pump system set to reduce energy use and emissions by 66%. Finn Geotherm became the first company in
Europe to install Panasonic’s colossal 210kW air source heat pumps in 2021. The first installations, undertaken for the University of West London, demonstrated the vast potential for air source heat pumps in large scale projects, with Finn Geotherm going on to install the 210kW air
Councillor Dan Roper, Portfolio Holder for Transformation & Organisational Development - Broadland District Council, Councillor Daniel Elmer, Deputy Leader of South Norfolk Council, and Guy Ransom, commercial director – Finn Geotherm
source systems in more than a dozen other public sector properties. The third installation currently being undertaken is the installation of two Stiebel Eltron ground source heat pumps for an HMO in Norwich managed by South Norfolk Council. Linked to eight bore holes, the 63kW system will provide all the heating and hot water for the residents and replace an existing gas boiler. The heat pump will be supplemented by a 26kWp Solar PV system, linked to battery storage cells. This will enable the heat pump to run using self-generated electricity for much of the year, further enhancing the positive impact of the project on the environment. Annie Sommazzi, clean growth and sustainability manager for South Norfolk Council and Broadland District Councils, said: “The two Councils have committed to being Net Zero by 2030 and the work we are doing at the new Horizon building will help to reduce the Councils’
carbon footprint by an incredible 84%. We are delighted to have appointed Finn Geotherm, a local heat pump installer with a wealth of experience and expertise in this sector, to undertake these three new renewable heating projects which will have a significant impact on our energy use and emissions.” Guy Ransom, commercial director at Finn Geotherm, said: “At the same time as ensuring everyone in the Horizon Centre, Diss Leisure Centre and the HMO can enjoy a warm and welcoming environment, these new air source and ground source heat pump systems will help support the Councils’ journey to Net Zero. Heating premises such as large office buildings and leisure centres in particular can often be seen as a challenge but these vast air source units provide the ideal solution. We’re looking forward to completing these three great projects for South Norfolk Council and Broadland District Councils over the coming weeks.”
Homegrown ground source heating for Cornwall homes
Truro-based Ground Source Heat Pump manufacturer and contractor, The Kensa Group, is deploying Networked Heat Pumps to provide 140 new homes in Quintrell Downs, Newquay, with low-cost, energy- efficient heating
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Cherilyn Mackrory, (3rd from right) was shown around the new
development by Kensa chief executive, Tamsin Lishman (3rd from left)
30 BUILDING SERVICES & ENVIRONMENTAL ENGINEER MARCH 2024
ornish MP, Cherilyn Mackrory joined Kensa chief executive, Tamsin Lishman, for a close-up tour and demonstration of the renewable heating system being installed, which
will save residents hundreds of pounds in annual heating costs. Each modern home will have its own ground
source heat pump connected to a Shared Ambient Heat Network, giving residents access to an effective, year-round clean heating system. This significant project comes as Kensa plans to deliver 70,000 heat pumps nationwide by 2030, a move that will create over 7,000 green jobs and help bring people out of fuel poverty. Tamsin said: “I was delighted to show Cherilyn how Kensa’s ground source heat pumps will
supply new homes with low-cost, energy- efficient, low-carbon heating. “What we’re doing here at Quintrell Rise is a great example of how networked heat pumps are a perfect green heating solution for new housing developments, benefiting both consumers and the environment. “This model can be deployed at scale for new build developments across the country, and can even be replicated for complex-to- decarbonise properties like retrofit high-rise flats or terraced streets.”
Mark England, head of innovation, sustainability and procurement at Coastline Housing, said: “Renewable heating schemes such as this are a fantastic addition to any new housing development. It means reduced costs for customers moving forward with their energy
bills and it’s also much more environmentally friendly so it’s really a win-win.” By having a ground source heat pump connected to the shared network, each home at Quintrell Rise will experience reliable heating with low running costs. Homes with ground source heat pumps also produce around 80% less CO2 than if they were supplied by gas.
Key development stats:
• Estimated annual cost for each home to power their heat pump is between £211 - £388 per year, depending on property size - significantly lower than if the properties were heated by electric panel heaters*
• 140 Kensa Shoebox heat pumps to be installed
• 58 boreholes across the development
This latest development follows other energy- saving projects completed by the Cornish company, including the ground-breaking Heat the Streets project in Stithians, the retrofit of 273 high-rise flats in Thurrock and the installation at Trelissick House, an 18th-century National Trust property in Truro. With the Future Homes Standard set to effectively ban installations of gas boilers in new build homes from 2025, ground source heat pumps are expected to be an essential solution for the Government to meet its target of 600,000 heat pump installations a year by 2028.
Read the latest at:
www.bsee.co.uk
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