As one of the countries leading providers of ground source heat pump technology, we have built a reputation on providing innovative temperature control solutions from 5kW to 1MW. Working closely with the manufactures and using our extensive knowledge and experience has made us the first choice when specifying a ground source heat pump.
Ground source heat pumps can not only supply heating and hot water for domestic and commercial projects but also efficient cooling by storing the rejected energy in the earth for winter operation.
Although Ground source heat pumps can achieve temperatures of over 60C this is primarily for hot water production. Existing heating circuits (radiators, under floor, fan coils) should be designed at a more efficient temperature of 35C-50C.
How does a ground source heat pump work?
The Earth acts a giant solar battery storing heat energy in the crust. Temperatures below the surface remain constant throughout the year - even in the middle of winter.
The energy can be extracted in a number of ways depending on the available surface area and the geology of the ground. The conventional method is to bury plastic pipe (High Density Poly Ethylene HDPE) in either a horizontal configuration at a depth of 1.2m or vertical bore holes at depths of 30m-100m. The number of collectors will vary based on the energy requirements.
Geothermal
Water is one of the most efficient and sustainable transfer mediums of energy. Underground rivers and lakes store vast amounts of useable solar energy. Tapping into this source using an open loop borehole method can achieve a COP of over 5. Alternatively energy can be extracted using a closed loop collector sited in either a fast flowing river\stream or lake with sufficient capacity.
Energy Piles
The Energy Pile is adapted from the conventional closed loop borehole. A network ofcollector pipe circulates the building foundations and piles extracting the energy required by the heat pump. This method of installation is used to reduce capital costs and potentially raise efficiencies.
Is a Ground Source heat pump suitable for my home?
To tell if a ground source heat pump is right for you, there are a few key questions to consider:
• Is your garden suitable for a ground collector?
It doesn't have to be particularly large, but the ground needs to be of suitable composition and capable of meeting the annual abstraction rate required by the heat pump. Consideration must also be given to the access required by the plant machinery and the logistics of excavating a trench or borehole.
• Is your home well insulated?
Ground source heat pumps are classed as a medium temperature heat source with a typical heating supply temperature of 50°C. Existing heating systems should be assessed for their heat output using the lower flow temperature. Emitter circuits may require upgrading if a stable room temperature cannot be maintained.
It is essential that your home is well insulated and draught proofed for the heating system to be effective.
