Heat your Home For FREE! Using the Earths Natural Heat.
Ground Source Heat Pumps are buried underground and are used to transfer the Earths Natural warmth into a building and heat it. In some cases they are used to pre-heat domestic water. There are other types of heat pumps which work in the same way such as air source heat pumps and water source heat pumps.
Save on your heating bills.
Ground source heat pumps use a buried ground loop, which captures the Earths natural heat. The efficiency of a Ground Source
Heat pump system is measured by working out the ratio between units of heat output per unit of electricity used to drive the compressor and pump, which operates the ground loop. Therefore the less energy used to produce the heat the more efficient the heat pump.
On Average every unit of electricity used, produces 3-4 units of heat. The best way to run a ground source heat pump is to consult a range of energy suppliers and benefit from the lowest running costs they can offer for example and economy 7 tarrif.
How do Ground Source Heat Pumps Work?
A ground source heat pump has three main elements.
- The Ground Loop.
- A Heat Pump.
- Heat Distribution System.
The ground loop is a length of pipe buried in the ground in either a trench or a borehole. It is usually a closed circuit, filled with a mixture of water and antifreeze. This liquid is pumped around the pipe absorbing the natural heat from the ground.
Ground source heat pumps work in the same way as your refrigerator does at home. Where as a Refrigerator extracts heat from the inside to keep your food cool, a ground source heat pump extracts heat from the ground and uses it to keep your home warm.
The pump itself has three components, the evaporator, which absorbs the heat using the liquid in the ground loop, the compressor, which compresses the gaseous refrigerant to the temperature needed for the heat distribution circuit and the condenser, which gives up the heat to a hot water tank, which feeds the distribution system. The final part of the pump is the heat distribution system is in most cases an underfloor heating system or a set of radiators to heat space however, some systems can also be used to heat water.
Is a ground source heat pump suitable for my home?
- You will need plenty of space outside your house for the ground loop.
- The ground will have to be suitable for digging a trench or a borehole
- Do you intend to replace oil, electricity, coal or LPG with the ground source heating? If so the savings will be more favourable than with gas.
- What type of distribution system will you be using? Underfloor heating is the most desirable as these systems operate at a much lower temperature.
- Combining the installation with the groundworks can save you money so if you want to use a ground source heat pump it is best to make the decision early.
- Make sure you do everything to keep the heat in by insulating your loft and floors and building as airtight as possible.
A typical Ground Source heating Pump will cost between £6000 - £12000 not including the distribution system, it seems like a large investment but could save you up to £1000 per year in heating bills.
Waste Water Heat Recovery Systems
The following video describes waste water heat recovery systems:
- how they work
- what benefits they can bring to a home
- and how they can impact on your SAP assessment.