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 associate 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 (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.
Hafren Water designed the ground array to provide heating and cooling for a multi-storey, environmentally friendly office building. The 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 (160 Kw), Staffordshire.
Hafren Water assessed the 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 was 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.
A ground array was designed 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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