Open Loop Cooling (400 Kw), Warrington.
We have recently undertaken the feasibility assessment, borehole design, testing and subsequent Environment Agency permitting for the new NWDA Science and Innovation Centre near Warrington. At this site up to 30 l/s will be abstracted to provide 375 Kw heating and 400 Kw of passive cooling from the Triassic Sandstone via one abstraction and three injection wells.
Open Loop Cooling (2.5 Mw), City of London.
As part of the renewable energy commitment for a proposed multi-storey building Hafren Water designed the required borehole array to abstract and re-inject water from the chalk. Borehole construction details were provided and costs obtained from drilling companies. The client was provided with details of potential risks associated with the project - both physical and regulatory. Computer modelling was undertaken to examine the impact of thermal breakthrough. Liaison with the Environment Agency was undertaken to confirm the viability of the project in relation to other heat pump systems in the area.
Open Loop Heating (250 Kw) from old mine workings, Newcastle-upon-Tyne.
An open loop assessment was undertaken on the feasibility of abstracting groundwater from worked coal seams at depth. The work involved detailed assessment of mine plans and discussions with the Coal Authority and Environment Agency. Water quality issues and mitigation methods were assessed.
Open Loop Heating (70 Kw), Norfolk.
Groundwater and surface water open loop options were assessed for a new build, residential eco home. Due to the environmentally sensitive nature of the surface waterbody the groundwater option was pursued. An abstraction and injection well have been installed within the chalk. The abstraction well is also to provide a potable water supply for the house.
Open Loop Heating (164 Kw), Bolton.
A feasibility study was undertaken for an open loop system to serve a new build luxury underground eco home. It is proposed to abstract and re-inject water to and from sandstone units within the underlying coal measure strata. Pumping tests on existing wells were analysed and an array design proposed. Planning permission is awaited before installation work can begin.
Open Loop Heating (60 Kw), Bedfordshire.
A feasibility study was undertaken to assist the tendering process for the installation of a closed loop system to serve a community hall, sports centre and eco hub. Assessment indicated the presence of unsaturated gravels with a significant increase in the required length of horizontal trench. The vertical borehole option was therefore recommended.
Open Loop Heating (200 Kw), Herefordshire.
As part of a refurbishment and environmental improvement programme to a large religious building, Hafren Water undertook a feasibility assessment for the use of an open loop system to provide heating. The available water resources were assessed. Groundwater yields from a thick gravel aquifer had the potential to meet the building heating loads. Borehole abstraction and injection well arrays were designed to minimise the impact on archaeological remains and the shallow watertable.
Closed Loop (120 Kw) for a new development associated with the 2012 Olympics, London.
Design of ground array to provide heating and cooling for a multi-storey, environmentally friendly office building. Energy loads were assessed and compared with our own estimates to ensure the proposed array was capable of meeting the varied building load requirements. The installation of the proposed array was integrated into the proposed building schedule. Potential geological hazards including surface contamination and running sands at depth were evaluated to inform the drilling strategy and associated costs.
Closed Loop (27 Kw), Isle of Wight.
Array design for a closed loop system comprising boreholes serving a nursing home. The system was designed to integrate with a thermal heat store including back-up gas boilers.
Closed Loop (66 Kw), Leicestershire.
Array design for vertical boreholes to serve a new sports club. After drilling of a trial borehole, difficult geological conditions were encountered and the array design, depth and spacing was adjusted accordingly to compensate. The system was designed to utilise off-peak electricity in conjunction with an OSKAR heat store plus significant input from solar thermal collectors.
Closed Loop (160 Kw), Staffordshire.
Assessment of ground array requirement for heating and cooling for a commercial development. Our design incorporated the results of a thermal response test plus an assessment of drilling conditions at the site. Due to the presence of coal mining in the vicinity, borehole records were obtained and liaison with the Coal Authority undertaken.
Community Heating Scheme, Lincolnshire.
Advice given on the geological conditions and array requirements for community projects at a number of villages. Ground source heating was being assessed as a method of reducing fuel poverty across the region. Our work provided the basis for an assessment of the major costs associated with drilling.
Closed Loop (5-28 Kw), Norfolk.
Design of ground array for multiple single unit installations within a development comprising 14 barn conversions. Our work included an assessment of the potential for thermal interference between the different units, rather than each being considered in isolation. By consideration of the geology, borehole depth and spacing we were able to optimise the design and reduce drilling costs.
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