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A ground source heat pump from NIBE can lower your energy costs by up to 80 %. You can also enjoy an environmentally friendly, renewable and free energy source that minimises your CO2 emissions. Ground source heat is pure, stored, solar energy that is retrieved from deep in the ground, the bottom of a lake or a few metres below the lawn. The most suitable is determined by the house's energy requirement, the existing heating system and the plot. The system provides a convenient supply of heat and hot water, and can also provide cooling during hot days.
During the summer, solar heat is stored in the soil. This is either directly absorbed as insulation or as heat from rain and the air from the near-surface layer of the soil. Using this energy for heating is a cost effective method. The highest yield can be obtained from soil with high water content. The heat is extracted from the soil by means of buried plastic tubing. An environmentally-friendly, non-freezing emulsion of water- and glycol circulates in the tubing. The soil above the earth collector may not be sealed off under any circumstances, i.e. by buildings, asphalt or concrete.
Earth collectors do not require a permit. Installation depth is approx. 20 cm below the local frost line.
In the lower subsoil of the so-called “near-surface geothermal layer” lies a heat source that can be utilized all year long, which has an almost constant temperature. It can be used for every possible building type, large or small, public or private. Depending on the region it is also referred to as, “vertical absorption, ground spit or ground lance”. It requires little space and the ground probe can be drilled on the smallest of plots. Therefore it is ideal for refurbishment or adaptation from a heating system fuelled by fossil fuels to the use of geothermal energy.
As with a surface collector a mixture of water-glycol circulates in a closed circuit (similar to the cooling system of a car). Depending on the necessary size of the heat pump unit a specialized company ascertains the depth and amount of bore holes in which the u-shaped plastic tubing is installed and pressed, in order to achieve good heat transfer.
If ground water is available and easily accessible, it can be utilized as a heat source due to the fact that it has a temperature of between 7 and 12 °C all-year round. It is advisable not to pump water for single and two-family houses from a depth greater than approximately 15 m. This would lead to expenditures being too high.
A distance of approximately 10 to 15 m should be kept between the withdrawal point (supply well) and the reinsertion point (deep-well) and furthermore the flow direction should be taken into consideration in order to avoid a “flow short-circuit”. These installations require a permit and must meet statutory requirements. However, this is no problem for NIBE equipment, due to their ISO 14001-certification. An optimal protection according to §7 MWG is provided by the “separator-exchanger-system”.
In the evaporator (heat exchanger) the energy transferes from the cold medium to the refrigerant. The refrigerant will then evaporate. The refrigerant is transported in the circuit by the compressor to increase the pressure and temperature of the refrigerant. In the condenser (heat exchanger) the refrigerant cools and condense. The energy is then transfered from the refrigerant to the heating system of the house, hot water system or airsystem The expansion valve regulates the mass flow of the refrigerant to maintain the pressure difference between the high pressure and the low pressure side.
Installing a ground source heat pump from NIBE can lead to a reduction in energy consumption of up to 80%. The reason for this is that a ground source heat pump uses the ground, surface soil or nearby lake as its main energy source, and all these kinds of energy are free of charge.
Although the heat pump doesn’t pay for itself in the first month, you will notice the financial benefits the first month after installation because your heating bills will be so much lower.
Moreover, the efficiency of NIBE’s latest generation of ground source heat pumps (they have an especially high operating range) positively impacts the speed with which you recover your investment.
The second reason for choosing a NIBE ground source heat pump is that it’s so environmentally-friendly. By merely storing and converting solar energy from the ground to heat your home and hot water, a ground source heat pump leads to much lower CO2 emissions than a traditional fossil-fuel based heating system.
Some governments and regional authorities offer subsidies to homeowners to switch from fossil fuel based heating to a more modern, renewable source of energy. Since ground source heat pumps are now officially classified as renewable energy, there couldn’t be a better time to change!
Ground source heat pump with an integrated water heater. The heat pump adjusts itself automatically to the power demand of the house.
Ground source heat pump with passive cooling and integrated water heater. The heat pump adjusts itself automatically to the power demand of the house.
Ground source heat pump without an integrated water heater. The heat pump adjusts itself automatically to the power demand of the house.
Ground source heat pump with passive cooling but without an integrated water heater. The heat pump adjusts itself automatically to the power demand of the house.
Ground source heat pump with an integrated water heater and extraordinarily high efficiency.
Ground source heat pump with passive cooling and integrated water heater and extraordinarily high efficiency.
Ground source heat pump without an integrated water heater. Extraordinarily high efficiency.
Ground source heat pump with integrated passive cooling but without an integrated water heater. Extraordinarily high efficiency.
Ground source heat pump with an integrated water heater.
Ground source heat pump without an integrated water heater.
Ground source heat pump for larger residential and commercial installations.