With the rising demand for energy-efficient and sustainable heating solutions, ground source heat pumps (GSHPs) are becoming an increasingly popular option. But how exactly do they work, and what benefits do they offer?
How a Ground Source Heat Pump Works
A ground source heat pump extracts heat from the earth and transfers it into your home. Unlike air source heat pumps that use outdoor air, GSHPs rely on stable underground temperatures to provide consistent heating and cooling throughout the year. In addition, as the source temperature is more consistent your running costs are less.
Key Components of a GSHP
A ground source heat pump system consists of several key components:
- Ground Loop: A network of pipes are buried, drilled, or in some cases placed in water in the ground, are filled with a heat-transfer fluid that absorbs heat from the earth.
- Refrigerant: A special fluid that carries heat through the system.
- Heat Exchanger: Transfers heat between the ground loop and the heat pump.
- Compressor: Increases the temperature of the absorbed heat before it is distributed.
- Indoor Distribution System: Delivers warmth through underfloor heating or radiators.
How a GSHP Heats Your Home
The fluid in the ground loop absorbs heat from the ground. The heat pump then compresses the heat, increasing its temperature. The heated fluid transfers energy to your home’s heating system. The cooled fluid returns to the ground loop to absorb more heat and repeat the cycle.
Benefits of a Ground Source Heat Pump
- High Energy Efficiency: GSHPs use less electricity than traditional heating systems, offering efficiencies of 300-400%.
- Lower Carbon Emissions: Since they utilise renewable energy, they reduce your reliance on fossil fuels.
- Year-Round Comfort: One of the most popular features of heat pumps is that they provide a comfortable stable indoor temperature all year round. No more fiddling with the thermostat.
- Reduced Heating Costs: Although installation can be expensive, lower energy bills provide long-term savings.
- Longevity: A well-maintained GSHP system can last 20–25 years, with ground loops lasting over 50 years.
Is a GSHP Right for Your Home?
Ground source heat pumps are ideal for homeowners looking for a long-term, energy-efficient heating solution. While they require an initial investment and sufficient outdoor space for ground loops, the financial and environmental benefits make them an excellent choice for many households. It’s also worth noting that the collector is a utility that will last for two or three heat pumps.
Air source or ground source – which is right for your home?
Read all about it here.
