The RVS water-to-water geothermal
heat pumps range, water-to-water type, which are the most efficient source of “green” energy forproducing hot water at high temperatures up to 90 °C.
Where there is sufficient space for the location of heat connection systems, RVS geothermal heat pumps offer high and consistent energy efficiency all year round.
Heat sources can be represented by:
- Geothermal surface collectors;
- Vertical geothermal collectors (boreholes);
- Boreholes for groundwater;
- Connections to surface water sources (lake, river, stream, etc.);
- Sewerage system pipes, etc.
RVS geothermal heat pumps are the perfect choice both for the production of heat to supply any type of heating system (individual or central, low or high temperature) and for the production of domestic or technological hot water.
Geothermal surface collectors
Heat is extracted from the ground through collectors made of polyethylene pipe. The collectors are buried in the ground and an antifreeze-type thermal agent circulates through them to provide frost protection. It is recommended that the soil is not covered with asphalt or concrete.
Vertical geothermal collectors
Heat is extracted from the ground at depth through collectors made of polyethylene pipe and mounted in vertical boreholes. At depths of more than 10 m, the ground temperature is constant at around 10-12°C, ensuring relatively constant energy efficiency throughout the year. An antifreeze-type thermal agent circulates through the collectors.
Boreholes for groundwater
Groundwater has a relatively constant temperature of between 7-12 °C, which ensures a relatively constant energy efficiency throughout the year. A minimum distance must be maintained between the abstraction well and the discharge well. The direction of water flow must be taken into account when drilling boreholes.
Connections to surface water sources
Heat is taken over (directly or via a heat exchanger) from a surface water source (lake, river, stream, sea, etc.). If there is a danger of the water source freezing, horizontal geothermal collectors can be installed in the water.
Sewerage system pipes
Heat is taken over from domestic water, from relatively constant flow sewage systems, or from wastewater systems from various industrial processes, using heat exchangers. From a design point of view, solutions can be implemented containing either type “1” or type “2” heat exchangers (as shown in the figure). The temperature of water in sewage systems is relatively constant in the range 10-20 °C, and in the case of wastewater, it depends on the nature of the industrial process from which it originates. This heat recovery solution is used in many cities in Europe.