Ground Source Heat Pumps

The demands and requirements of each potential Heat Pump user will dictate which type of Heat Pump and system is most suited to their particular application.

Green & Co Renewables Ltd treat the specification of every potential application very seriously and have a best advice policy to ensure that each potential Ground Source Heat Pump or Geothermal Heat Pump application matches the requirements of the project and any other demands of the client i.e. budgetary, amount of use per year etc.

This is why we offer a range of Ground Source Heat Pumps, Geothermal Heat Pumps and ancillary equipment, this range of units enables the appropriate Heat Pump to be matched with both the demands of the installation and the method of ground heat collection.

We also use experienced hydrogeological consultants to ensure that Ground Source Heat Pump and Geothermal Heat Pump applications are correctly specified using the appropriate method of collection to match the needs of the project. There are a number of methods used to extract heat from the ground, examples are shown below:

Ground Heat Collection Method Classifications

Geothermal probes, closed loop

These systems circulate heat collection fluid around a circuit flowing continuously from the Heat Pump and down the pipes set within the borehole. This fluid extracts Heat from the ground via the geothermal probes set within the borehole and brings the heat energy back to the Heat Pump.

Boreholes with open loop

Here ground water from an underground source is pumped up from the source to the Heat Pump, the heat is extracted and the water is then piped back down onto the ground.

Horizontal Thermal Probes, closed loop

These systems can be referred to as slinky type collectors and are positioned to a depth of 1.5 metres below ground level horizontally within the grounds of the property. These horizontal collectors collect heat from the ground but also take heat via solar gain from the atmosphere i.e. the ground temperature increases and is regenerated on a daily basis via solar energy.

Energy Piles, closed loop

This method uses the piling base underneath a property to extract heat from the ground by placing collection pipes within the piles which then act in the same way as the Geothermal Probes shown above.

Each method of heat collection can be used depending on the space available and the efficiency demands of the project.

In general terms to give more uniform operating temperatures and security of performance the deeper the heat is collected from the ground the better.

Boreholes with a closed loop Geothermal Probe system as the one shown below will extract heat from the ground at depths of up to 100 metres; however boreholes at any depth from 10 metres to 100 metres allow varying amounts of heat to be extracted reliably using heat energy from the earth.

Ground Source Heat Pumps and Geothermal Heat Pumps must be able to provide sustainable supplies of heat over the lifetime of the home over a long period.

The Heat Pump unit itself will continue to operate as long as it is able to gather the correct amount of heat from the ground. This is why the specification and installation of the ground collectors must be carried out to a high quality level. A well designed but badly installed system will provide the same poor results as a badly designed but well installed system. Therefore a total project management approach is required to ensure that sufficient care is taken to ensure that all components are compatible and of high quality and importantly the design is secure in terms of future performance.

Green & Co Renewables Ltd six step service approach ensures that not only the Heat Pump is high quality, but also the geothermal pipework used is the best available. We use Rehau geothermal pipe which does not require any welded joints to be used at any point within the ground, obviously building integrity into the system.

This is just one example of the engineering approach that we bring to all their Ground Source Heat Pump and Geothermal Heat Pump projects, ensuring that not only the equipment but also the method of installation is applied correctly and appropriately.

We are always keen to assist both existing customers and potential customers with any information and advice on every aspect of a Heat Pump application. The policy of providing customers with best advice and the six step service approach work towards forming a long term relationship with each customer based on an open and informed relationship.

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