Case Study 3 - Geothermal Services - Commercial Open Loop Heat Pump and Natural Cooling System, Malmesbury, Wiltshire
Scope of work: Development of non-consumptive groundwater supply to provide commercial scale space heating and domestic hot water supply together with natural cooling for multi-roomed residential property. GGS input included Feasibility Study, abstraction/injection wells design, drilling consent, contractor selection, drilling supervision, pumping test reporting, system commissioning and abstraction licensing procedures.
Pictured above: Plant room equipment and controls with heat pump on back wall at right.
| Installation Details | |
| Source of water: | Jurassic Inferior Oolite |
| Depth of holes: | 2 No to 114 metres |
| Drilling method: | Rotary mud flush |
| Yield development method: | Airlift |
| Standing water level: | 12 metres below ground level (mbgl) |
| Pump setting depth: | 70 mbgl |
| Pumping water level: | varies seasonally |
| Pump type: | Grundfos electrosubmersible |
| Yield: | 200 cubic metres/day |
| System yield requirement: | 2.5 litres/sec |
| Water treatment: | In line particulate filtration (precautionary) |
| Heat pump output: | 45 kW |
| Waterwell Contractor: | Taylor Drilling |
| M&E Contractor: | Hydro Mechanical Services Ltd |
Client’s verdict: