For the future-oriented heating / cooling concept, the soil conditions proved to be ideal for using the heat source “groundwater”. In any case, the area in the old branches of the Lower Rhine is, in this regard, extremely productive.

Two wells, each 18 meters deep, were drilled. The sump well was placed downstream of the sampling well, at a distance of 70 meters, in order to avoid mixing. 365 days a year – even on very cold winter days – constant groundwater temperatures between 8 and 12 ° C prevail at this depth. The delivery rate of the extraction well is a maximum of 60 cubic meters per hour. 18 hours a day, the groundwater may be deprived of energy.

Key facts

Building  Heat pump and source
LocationDüsseldorf, Germany
 Number of HP4
Construction2009 Installed power352W
Heat distributionpanel heating Operation modecascade
Heated area10.200 m² living Heat sourcegroundwater
     
     
Heating system Domestic hot water
Heat demand345 kW Type of systemunknown
Heating temperatureunknown Max. temperatureunknown
   Circulation systemunknown
     
Other information   
Efficiency of the heat pump (SPF)4,5   
Investments costsunknown   
PV installationno   

Description of the technical concept

The water is fed into the house via large, well-insulated pipelines and passes through four heat. Two brine-water heat pumps each are placed in a space-saving manner in the technical room of the basement, the entire system is cascaded. A control unit ensures that the operating hours of all four large appliances are almost identical. This is important to ensure a long service life of the system. The heat source is groundwater, which is made available to the four heat pumps via a large-scale DC link heat exchanger. Two storage tanks, each with a capacity of 1,000 liters, separate the heat generator from the heat distribution system and ensure efficient and trouble-free operation of the system.

Case Studie Sheet DE Quartis les Halles