Ground Source Heat Pumps
Ground Source Heat Pumps (GSHPs) absorb low grade heat in the ground from rock, surface soil, or from a nearby lake or riverbed. The system transports and releases this energy in your home for hot water and central heating. Franck Energy will help you switch to a GSHP without hassle.
A Ground Source Heat Pump is one of the most popular renewable energy solutions on the market, and many UK residents have utilised their outdoor space to install one. The energy bill savings are significant, and the technology qualifies for the government’s domestic Renewable Heat Incentive (RHI) scheme.
These systems are often more efficient year-round than Air Source Heat Pumps, but they require more space to install due to the under-surface ground loop. The temperature below ground retains similar levels regardless of weather, so you can be sure of warmth in all seasons.
Not sure whether your home is suitable for a Ground Source Heat Pump? Contact us for advice.
Adds value to your property
Earn an income through domestic RHI scheme
Reduces your home's carbon emissions
No more oil, LPG or gas bills
Low-maintenance, 'fit-and-forget' technology
No planning permission required
3 Bedroom House
Monthly: Savings *£25 + Government subsidy **£208 = Total savings £233 Yearly: Savings *£300 + Government subsidy **£2500 = Total savings £2,800 7 Years: Savings *£2100 + Government subsidy **£17500 = Total savings £19,600
5 Bedroom House
Monthly: Savings *£38 + Government subsidy **£250 = Total savings £288 Yearly: Savings *£450 + Government subsidy **£3,000 = Total savings £3,450 7 Years: Savings *£3,150 + Government subsidy **£21,000 = Total savings £24,150
* Typical monthly/yearly/7 years savings for a 3/5-bedroom house switching from oil fired heating.
** Typical amount received every month/year/7 years in RHI payments, for installing renewable heating in a 3/5-bedroom house.
Ground Source Heat Pump FAQs
The ground absorbs low-grade heat from direct sunlight and rain, giving it year round temperature of between 8- 12°C. When an antifreeze mixture is pumped through the ground within an energy absorbing pipe, known as ground array, the antifreeze circulating in the array is constantly warmed by the ground’s low-grade heat.
Having increased in temperature, the anti-freeze mixture returns to the heat pump, where the evaporator in the heat pump is used to extract the heat from the ground array. This is achieved through boiling the refrigerant (boils at -10°C), which turn into a gas that is then fed into the compressors.
The compressors increases the temperature of the gas to between 75°C - 125°C through an increase in pressure. This hot refrigerant gas then flows into a second heat exchanger called a condenser, where as the gas condenses the heat is passed into the heat exchanger which powers the central heating system and supplies the domestic hot water. Our ground source heat pumps increases the temperature from the ground by around four times – so if the ground temperature is 12°C, the output would be 48°C.
Having transferred its heat, the refrigerant gas reverts to a liquid. This liquid is passed through an expansion valve at the end of the cycle to reduce its pressure and temperature, ready to start the cycle all over again.
Installing a ground source heat pump can save you £2,800 per year for an average 3 bedroom house. (Savings £300, Government subsidy £2,500). Choosing the right system to realise these savings is very complicated, and that’s where Franck Energy comes in. For a more accurate savings quote, contact us today.
Please read our article: Ground Source Heat Pump Installation Costs
No. You need a certain amount of outdoor space to install a GSHP, although you usually don’t need planning permission. Let us know how much space you have available and we can tell you whether this is appropriate for the system.
Rock: The heat pump collects stored solar energy from a collector, normally a hole drilled into the bedrock. This type of system requires little space and gives you a constant heat source all year round. It can be implemented in all building types: large or small, commercial or residential.
Surface soil: In the summer months solar heat is stored in the soil. The heat pump collects this stored solar energy from a buried collector, known as a ground array. This is a popular and cost-effective type of collector, where the highest yields can be obtained from soil with high water content.
Lake / River: If your home is next to a water source such as a lake, heat from the lake water can be extracted using a surface soil collector anchored to the bed of the lake.