House on the lake in Kalkar
The pilot project “Living with Vision” is a 120 square metre research building with plus-energy standards that originated in 2011.
The cube-shaped building, which floats on pontoons, plays a vanguard role with respect to energy efficiency and innovative housing development.
The initial housing concept was developed by the architects Hülsmann & Thieme. In view of the fact that spatial resources in many cities are exhausted, the gravel pit provided an eco-friendly alternative for building one- to two-storey structures. The one-storey pilot building was erected on a steel pontoon as a timber stud construction; additional buildings are planned. Designed as a floating research station, the cube-shaped building is used for simulating and analysing the life of a family of four. To adapt the construction to the energy requirements, the building shell was optimised so that the required heat was reduced to less than 14 kWh/m2a. This requirement is supplied by a geoTHERM plus brine/water heat pump from Vaillant that is modified for an output of 3 kW. The system is supplied by a thermal basket in the lake, which functions just like a heat exchanger. A 500 litre multi-function tank buffers the heat and supplies the hot water and drinking water. The downstream heat distribution is achieved by a surface heating system and special heat pump elements.
In the summer the heating circuit of the heat pump is automatically bypassed and passive cooling is started. The thermal basket then diverts the excess heat directly into the lake water. The energy concept is supported by three photovoltaic systems for power generation: PV modules on the roof, collectors that automatically follow the movement of the sun as well as vertically installed modules for utilisation of the light reflected from the water.
Facts and figures
|Designation, name of project:||House on the lake in Kalkar|
|Location:||Birgelfeld gravel pit lake in Kalkar-Hönnepel|
|Key figures – Area:||120 m²|
|Key figures – Technology:||14 kWh/m²a heating energy|
|Key figures – Energy concept:|
|Building owner:||Kieswerk Maas-Roeloffs GmbH & Co. KG|
47546 Kalkar / DE
|Architects:||Architekturbüro Hülsmann & Thieme|
47533 Kleve / DE
|Facilities planner:||BASCON Engineering GmbH|
47574 Goch / DE
|Plan material & source:||Architekturbüro Hülsmann & Thieme|