How Do Ground Heat Pumps Work?
Ground source heat pumps work kind of like a fridge in reverse. Instead of extracting heat to produce a chilled environment, a heat pump extracts the cold to produce heat. Looped pipes are buried under the ground and they capture the solar energy stored in the ground itself, and the captured energy is then converted into heat which can be used for several different heating solutions like:
- Underfloor heating
- Conventional central heating using radiators
- Hot water
Ground Source Heat Pumps are most efficient and cost effective when used for background heating like an underfloor heating system, as this requires a lower input heat than that needed for conventional radiator heating or domestic hot water. An underfloor heating system generally only requires a relatively low flow temperature of 35oC, which will have an efficiency level of around 400%. But a conventional radiator system requires a much higher flow temperature of at least 50oC, which will reduce the level of efficiency to under 300%, resulting in higher running costs & fuel bills.