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TKAC / Mitsubishi Electric Ecodan Case Study

An excellent example of TKAC successfully working as part of a design and installation team is the creation of a heating system for Woolley Wood Primary School in Sheffield.

Woolley Wood School

Woolley Wood SchoolWoolley Wood is a primary community special school for children with severe and complex learning difficulties and disabilities.

Sheffield’s local education authority contracted Kier Sheffield LLP to design and build the new school. Within the brief was the requirement to meet the city council’s strict planning regulations which call for a minimum of 10% of the building’s energy needs to be met from renewable or low carbon energy. It also required a 20% reduction in carbon emissions.

Yorkshire-based Mechanical & Engineering Consultants, Thornley & Lumb Partnership Ltd designed and specified the building services.

Ecodan Heat Pumps Renewable Heating

Ecodan Heat Pumps Renewable Heating

Specific project challenges included:

  • Only power energy supply available was electricity.
  • The new system had to provide heat for the whole school including hot water for a hydrotherapy pool.
  • Plant space was very restricted.
  • Access to the school site was restricted making on-site construction impossible.
  • Ongoing monitoring of energy efficiency targets for the new building were required.

TK Air Conditioning were contracted to design and install the solution.

Mitsubishi Ecodan CAHV Air Sourced Heat Pumps

The Ecodan CAHV is a creative solution to providing renewable heating. The monobloc air source heat pumps were ideal to serve the underfloor heating system designed for the school. Underfloor heating eliminates the need for wall mounted radiators, saves space, and provides heat and hot water for the entire school.

High Efficiency Heating Systems - Offsite ManufacturingAir source heat pumps are classified as renewable energy technology by the EU and the UK Government, as, for every 1kW of energy consumed an average of 3.2kW of usable heating energy is produced. Air source heat pumps operate effectively in ambient temperatures as low as -25°C, producing hot water of up to 70°C. Each Ecodan CAHV unit is capable of producing up to 43kW of energy and can work in combination to meet the energy requirements.

High Efficiency Heating Systems – Offsite Manufacturing

As access to the school site was limited, TK Air Conditioning designed a heating system that could be built on two skids and imported whole. The heating boilers were installed on the first skid and a plant room built onto the second. Specialist sensors were incorporated into the heat pump boilers, to transmit real-time data that is processed and can be fed directly back to the heating engineers and the client.

Off-site manufacturing reduced the installation time by 75%, making it quicker, safer and cheaper for the client. The cost of constructing a roof plinth was also eliminated by locating the skids directly onto anti-vibration pads, ensuring they stayed comfortably within the maximum load dictated by the structural engineers.

“The process of getting equipment onto a roof can take time and involve engineers in working at height, often around other construction workers,” said Mitch Swirles, Managing Director of TK Air Conditioning . “This increases the potential for accidents and the risk of damage to the equipment itself. To avoid this we package the heat pumps onto specially constructed skids, which also incorporate an electricity supply and deliver them on a Just-In-Time basis which negates the need for other specialists to work around the plant.”

Cost Effective & Energy Efficient HeatingThe ‘plug and play’ solution just needed to be connected to the water and electricity supplies and was immediately able to provide heat and hot water to the whole school building.

Cost Effective & Energy Efficient Heating

The Ecodan CAHV system installed in the school reduced CO2 emissions by 30% and made a substantial impact on the heating costs to the school. Off-site manufacture, innovative design and efficient installation also minimised costs to the customer.

CAHV product is an ideal heating solution for large scale underfloor heating applications. Coupled with TC Air Conditioning’s off-site construction option if offers a safer, more cost-effective installation. Reducing running costs and CO2 emissions it is ideal for new-build and retro-fit and is ideal for many community heating schemes.

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Mitsubishi Electric Ecodan Domestic Air Source Heat Pumps, Off-site Manufacture, Variable Low Flow Temperatures for Energy Efficient Home Heating. Efficiency Higher & Running Costs Lower For Under Floor Heating Systems. Ecodan Domestic Air Source Heat Pumps for Lower CO2 Emissions & Reduced Running Costs. Mitsubishi Electric Ecodan is Fully Accredited for the Microgeneration Certification Scheme, MGS.

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