Ground Source Heat
Recent changes to planning policies have set targets to reduce Co2 emissions in all new mahor developments by 10%.
One way to achieve this is to adopt ground source heating and cooling techniques to implement climate control within a building. This involves using the nearby ground as either a heat source during colder weather or as a heat dump during the warmer months.
The methods of utilising this technology are classified in two main categories:
Open Loop and Closed Loop.
Open Loop
Open Loop systems use groundwater from aquifers beneath the site. Two water boreholes are usually drilled, with one being used to abstract water which is then pumped through a heat exchanger before being returned to the second or ‘recharge’ borehole.
Project Dewatering work alongside one of the foremost water well drilling contractors in the U.K - Drilcorp Ltd.
Drilcorp have the experience, expertise and in-house capability to handle all Licensing, Design, Construction, Testing and Commissioning of any water boreholes that need to be installed and have carried out many prestigious projects, with particular experience in the very demanding and limited-access sites of Central London.
Closed Loop
Closed loop systems are often adopted on projects where insufficient water is present beneath the site for Open Loop systems. This method is also used commonly on domestic projects.
The method involves the placement of a length of plastic pipe into the ground either vertically or horizontally where practicable. This can avoid the need for expensive site drilling. This pipe forms a loop with one end leaving and the other returning to the heat exchanger. Fluids are pumped around the pipe gathering or depositing heat using refrigerator-like technology.
Large projects require many vertical loops which are connected with a manifold at the surface.
The team have enormous experience in a wide range of geothermal projects, carrying out as many as 100 loops installed to depths of 100 metres below ground level.