Ground Source Heat Pumps

Geothermal or ground source heat pumps are most commonly used to supply heat, however they can also be modified to cool a building.

Study finds natural refrigerants more energy efficient than HFC and HCFCs in geothermal heat pumps

Study finds natural refrigerants more energy efficient than HFC and HCFCs in geothermal heat pumps

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Sector
Heat Pumps Ground Source
Application
Residential
Technology Type
Closed-Loop
Refrigerant
Ammonia
Hydrocarbons
Manufacturer
Country
Iran
Energy Efficency
Coefficients of Performance (CoP) when compared to HFC-134a and HCFC-22.

A study on refrigerants used in geothermal heat pumps in a 14-storey residential building in Iran, has shown that ammonia and hydrocarbon produce significantly better Coefficients of Performance (CoP) when compared to HFC-134a and HCFC-22.
The researchers monitored performance of a horizontal closed-loop ground heat pump with a cooling load of 915 kW (260 TR) in the town of Qazvin. Ammonia came out as the most energy efficiency refrigerant with a CoP of 4.663. Hydrocarbon, n-butane’s COP was 4.606. Overall the natural refrigerants had COP’s 4.5%-5.8% higher than HFC134a. Similar results were obtained for open-loop and vertical closed-loop ground heat exchangers.
The study also found ammonia and n-butane to have a reduced initial system cost compared to HCFC-22 and HFC-134a in terms of initial system cost.

Sensor SNTM5-15

Sensor SNTM5-15

Sector
Heat Pumps Ground Source
Application
Domestic
Technology Type
Refrigerant
Propane
Manufacturer
Heliotherm
Manufacturer Country
Austria
Energy Efficency
This heatpump has the European Union's most energy efficient energy label rating (A***) under the Ecodesign Directive.

The heat pump has a heat output of 8.25kW and a cooling capacity of 5.52kW. It has heating outlet temperatures of upto 70°C, enabling combination with conventional radiators. It is PV ready, with performance adjutsable to solar power availability

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Natural Technology Heat Pump

Natural Technology Heat Pump

Sector
Heat Pumps Ground Source
Application
Domestic
Technology Type
Refrigerant
Propane
Manufacturer
Heliotherm
Manufacturer Country
Austria
Energy Efficency
SCOP of up to 10 when matched with PV system.

The propane heat pump uses the ground as the source energy and can be used in combination with photovoltaic systems, increasing the annual efficiency. Worldwide heat pump remore control access via the internet is also available for this system.

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