Filtration for HVAC systems

District heating

At depths beyond 400m the geothermal heat from thermal water reservoirs can be used in „district heating“ systems. This sustainable source of energy is used to heat homes, buildings or industrial plants while generating nearly no CO2 emissions.

The hot thermal water is pumped up from deep underground, passed through a filter and then circulated through a heat exchanger. 
The thermal water heats a secondary closed loop which distributes the heat to homes and businesses that are connected to the district heating network. Filters are often required in the secondary loop to protect the pumps, piping and heat exchangers used in the system.
Once the thermal water exits the heat exchanger it is re-injected back into the earth. In many cases regulations state that the thermal water needs to be filtered before re-injection to avoid contamination of the thermal water reservoirs.

District heating water filtration

District heating water, is not just heated water. The water quality is of great importance to improve productivity. Proper water filtration is a precondition of optimum protection of components in the district heating system. 
BOLLFILTERs like the aquaBoll® or the Simplex Type 1.53.1 are used to protect both the primary thermal water loop and the closed secondary loop of the district heating system. They are specially designed for this application and remove solids out of the water in order to protect heat exchangers, pumps and bore reinjection of the geothermal plant.