TechnologieWiki

{{Ground Source Heat Pump (GSHP)
|Description=Ground source heat pumps extract heat from the ground via pipes buried in the garden. The heat from the ground is absorbed into the fluid (water and vegetable based antifreeze) that circulates around a ground loop. Passing through a compressor, the temperature is raised to a level that can be used for heating and hot water.
If enough space is available, the loop is usually laid flat or coiled in trenches about two metres deep. However, it space is scarce, boreholes need to be drilled to install a vertical loop to a depth of up to 100 metres.
|Advantages=*Increased energy efficiency compared to air-source heat pumps as temperatures in the ground are fairly constant throughout the year
*Requires little maintenance
|Disadvantages=*High initial investment cost
*The overall efficiency may decrease if the heat pump is also used to provide hot water
*Horizontal collectors may be less expensive than vertical collectors, but they require a lot of space and the ground cools down quicker as it is closer to the surface
|Characteristic features=Ground source heat pumps has been called the most energy-efficient, cost-effective, and environmentally clean space conditioning systems that are available on the market after the US Environmental Protection Agency
|Application barriers=High initial investment cost
|Information sources=http://energysavingtrust.org.uk/Generating-energy/Choosing-a-renewable-technology/Ground-source-heat-pumps<br />http://isoenergy.co.uk/products/index/?cat_id=2#overview-tab
|Trade=Building services
|DimensionsMin=500/467/850
|DimensionsMax=934/780/1,561
|WeightMin=103
|WeightMax=395
|COPMin=2.9
|COPMax=5.11
|COP Annual Degradation RateMin=1.0
|COP Annual Degradation RateMax=1.0
|Permitted Operating TemperatureMin=20
|Permitted Operating TemperatureMax=65.5
|Heating CapacityMin=10
|Heating CapacityMax=60.0
|EERMin=5.18
|EERMax=6.01
|Cooling capacityMin=10.4
|Cooling capacityMax=39.2
|Heat Transfer Nominal FlowMin=7.5
|Heat Transfer Nominal FlowMax=171.6
|Maximum PressureMin=10
|Maximum PressureMax=10
|Sound Power LevelMin=44
|Sound Power LevelMax=66
|Type of RefrigerantMin=a chemical blend (R-410A)
|Type of RefrigerantMax=a chemical blend (R-410A)
|CO EmissionMin=lowest
|CO EmissionMax=lowest
|NOX EmissionMin=lowest
|NOX EmissionMax=lowest
|Investment CostMin=9.316
|Investment CostMax=23.289
|Operating CostMin=1/4 of conventional equipment
|Operating CostMax=1/2 of conventional equipment
|Maintenance CostMin=0.10
|Maintenance CostMax=0.20
|Life ExpectancyMin=25
|Life ExpectancyMax=30
|}}