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ground source heat pumps

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BDC 319 : Aug 2024

ground source heat pumps

Glasgow street shows the only way to install 600,000 heat pumps each year and hit net zero is to replace the UK’s gas grid

Green Street in Glasgow, just a stone’s throw from COP26 will show that the only way to install 600,000 heat pumps a year and hit net zero is by replacing the UK’s current gas grid. The inner city street will be brought to life using pioneering augmented reality to show how networked ground source heat pumps that mimic the current gas network are the cheapest way to decarbonise heat and could save the UK an estimated £1bn a year to 2050. The solution shifts responsibility from consumers getting rid of their gas boilers and installing individual infrastructure for ground source heat pumps on an ad-hoc house-by-house basis, to the pre-installation of utility-scale underground infrastructure that allows consumers to easily and cheaply change to ground source heat pumps when they’re ready. The infrastructure is funded, owned and maintained by an energy or water company, local authority or private investor removing the cost from consumers who pay a standing charge similar to gas. Simon Lomax, CEO of Kensa, the UK’s only manufacturer of ground source heat pumps, said: “It isn’t possible to reach critical mass or secure the cost reductions expected by government by adopting a house-by-house approach, placing responsibility to deliver our climate targets on individuals. “To really kick-start the transition to heat pumps, the government needs to work with the energy industry and suppliers to popularise a networked ground source heat pump where the cost of infrastructure is divorced from the heat pump in a split-ownership approach. “Running costs and carbon emissions will be far lower than any other heating choice. Pre-installation of the infrastructure means whole communities such as tower blocks can switch to individual networked heat pumps simultaneously, as well as enabling households to easily and affordably make the transition from their gas boiler to a heat pump when they’re ready to change, with minimal disruption.” Kensa’s ‘Welcome to Green Street’ launching on 1 November at COP26, created by Emmy award winners Alchemy Immersive, will prove how a whole systems approach to decarbonising how we heat our homes can unlock benefits across communities and compliment and balance the electric network as we come to reply more heavily on it with heating and electric vehicles. Simon added: “Green Street is our way of setting out a virtual street map that proves any street can be a Green Street, by showing how the ground beneath our feet can transform how we heat and power our homes and accelerate progress on climate change through the lowest carbon, cost and electrical grid compact solution. “By utilising waste heat and low-temperature ambient loop systems our solution connects homes and businesses to deliver sustainable heating and cooling that’s highly efficient, low carbon and low cost for all stakeholders and enables the balance of energy supply and demand.” Kensa has been engaging with energy suppliers, the UK and Scottish governments and other leading organisations and continues to make progress to making the ‘Green Street’ solution a national reality. Thousands of properties across the UK are already enjoying the benefits of networked heat pumps. Thenue Housing which has homes in Green Street, said it welcomed innovative and trailblazing solutions to the global climate emergency including those which relate to domestic energy consumption. Eleanor Derbyshire, Head of Property Services at Thenue Housing, said: “Thenue Housing is delighted that one of the streets where we have our housing stock should be showcased in this way as the way forward in terms of energy consumption and conservation. We recently invested in our on-site heating so while we are currently not planning to make energy-related changes to our homes in Green Street, we think there is no better-named street anywhere in the city to highlight this work. “As a housing provider which has strong historical links with Glasgow and its heritage, we readily acknowledge the need for action at this game-changing summit where so much can be gained by global co-operation on climate change.” Since 1999 Cornwall’s Kensa has saved over 1 million tonnes of carbon through ground source heat pump installations across social housing, new build and retrofit homes and businesses. It was the first company to prove a solution for flats and apartments through its small ‘Shoebox’ heat pump, used by many city councils and recognised by the Greater London Authority as the most efficient, lowest carbon, lowest cost solution for heating and cooling high-rise buildings. To experience Green Street please visit www.welcometogreenstreet.com

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Ground source heat pumps eligible under new £160m social housing retrofit fund

As the Social Housing Decarbonisation Fund (SHDF) opens to applications, Kensa Contracting is urging local authorities and housing associations in England to act now and bid for a portion of the £160m available in 2021/22 to install highly efficient low carbon ground source heat pumps to tackle climate change and protect their tenants from fuel poverty. Ieman Barmaki, Director of Low Carbon Partnerships at Kensa Contracting, says: “We are very pleased to see ground source heat pumps included as a measure in this funding scheme which will help local authorities replace fossil fuel heating systems and deliver warm, energy-efficient homes whilst reducing carbon emissions and fuel bills.   “It is critical that some of the most vulnerable in society can benefit from low cost and low carbon heating systems. There are currently 2.5m households across the UK in fuel poverty who are unable to afford adequate heating. This fund can make a significant impact on fuel poverty if ground source heat pumps are installed as part of the solution to place residents on a net zero pathway.” There is an 8-week application window for the first wave of SHDF funding bids, beginning on 23rd August and ending on 15th October. To help capitalise on this opportunity, Kensa Contracting will be delivering free CPD sessions showcasing the benefits of ground source heat pumps in social housing with large-scale retrofit case studies and demonstrating how the technology is eligible under the scheme. Local authorities are invited to register their interest here: https://kensa.group/shdf-cpd Kensa can also support local authorities in making a bid by delivering desktop feasibility studies of building stock to help identify ‘retrofit-ready’ projects, and providing estimates for the investment budgets and potential grant amounts needed for installing ground source heating systems. The UK government has committed to reducing emissions to net-zero by 2050, and over 10 years, the SHDF fund will potentially provide up to £3.8 billion in subsequent funding waves to encourage local authorities in England to retrofit measures such as low-carbon heating and insulation to increase energy efficiency and decarbonise their housing stock.  The primary objective of the SHDF scheme is to upgrade a significant amount of England’s 4.1m social homes to an Energy Performance Certificate (EPC) rating of C by 2030. Currently, nearly 40% of properties fall below this, with fuel poverty posing a serious risk for residents when high fuel bills mean tough choices between heating or eating. Under the scheme’s guidelines, low carbon heating, including ground source heat pumps, can be installed where a ‘fabric first approach is taken’. Electrically-powered ground source heat pumps are sustainable, non-combustion devices generating no point of use emissions or pollution, and have been highlighted by government as a key part of the UK’s strategy to decarbonise heat, of which 37% of total UK carbon emissions are attributed to. Using freely available heat energy from the ground, a ground source heat pump can deliver 3 to 4 kilowatts (kW) of heat for every 1kW of electricity it consumes, making it highly efficient. While modern condensing boilers can be up to 90% efficient, a ground source heat pump can achieve efficiencies of 400%, without the carbon emissions or air pollution created by burning fossil fuels. The government’s 10-point-plan to put the UK back on track to meet its net-zero carbon target by 2050, states the aim to have 600,000 heat pump installations every year by 2028, and the Committee for Climate Change (CCC) has suggested this figure should even be increased to 900,000. This will require a massive scaling up of ground source heat pump installations, and Kensa believes that a Shared Ground Loop Array infrastructure is the key to achieving this. Shared Ground Loop Arrays are a modern-day renewable alternative to the traditional gas network that allow multiple properties to benefit from communal clusters of boreholes, with individual heat pumps installed inside each property. This approach is perfect for multiple occupancy dwellings such as tower blocks. The retrofit of a three tower-block scheme with Kensa Contracting and Croydon Council has been documented in a recently launched film here: https://kensa.group/shdf-croydon. The Croydon scheme provides a blueprint for the potential low-carbon retrofit of the 1.6 million flats in the UK, representing 41.8% of all households – a portion of which could be fast-tracked to warmer, greener, and cheaper homes through the Social Housing Decarbonisation Fund.

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