At the new Henry Kruse company location in Neumünster, great importance was already placed on greater storage capacities and higher logistics performance values, as well as on sustainable building technology, during the planning stage.
According to company owner Kai Kruse: “For us, it was important to build in a sustainable way - with the environment and the longer term future in mind. Energy consumption in the building is covered almost entirely by self-produced solar energy, so that we can work at the site in a largely climate-neutral way”.
Photovoltaic and geothermal energy in use
The photovoltaic system on the roof of the new building has almost the same capacity as a power plant that could supply a housing estate with around 100 family homes (average annual consumption of a single family home ≈ 5,700 kWh).
The over 636 kilowatt peak (kWp) of the plant correspond to an annual output of 565,178 kilowatt hours (kWh), while the average annual consumption of a single family home is approximately 5,700 kWh.
The geothermal facility also makes use of the earth’s heat: 16 probes extend 120 meters into the earth in order to either heat or cool the building with its approximately 27,000 square meters of useful area, depending on the time of year.
Avoidance of heat loss
To avoid heat loss in the building, heat exchangers have been installed in the ventilation system.
80 percent of the thermal energy contained in the exhaust air is returned to the building’s heating circuit.
Mineral fibre thermal insulation has also been used in most areas of the building - a decision which far exceeds the requirements of the Energy Saving Regulation (EnEV).
The insulation thickness in parts of the building with mineral fibre insulation is approximately 20 percent higher than the standard insulation thickness in comparable company buildings.
Minimal energy consumption in the new computing centre
The modern computing centre at the new site has been designed so that it uses just 26 percent of the energy needed at the previous location!
To cool the computing centre and technical equipment area down, cold water is used from the geothermal system.
The waste heat from the servers - when fully operational, they produce as much heat energy as about eight family homes - is also fed into the heating circuit. Not least, highly energy-efficient hardware has been installed, which has led to dramatic savings.
Cooling and illuminating rooms in a more environmentally friendly way
About 60 percent of power has been saved compared to a standard air conditioning system.
This is made possible by limiting room temperatures during the summer to around 24 degrees Celsius through the use of draught air-free cooling ceilings.
Here, as with the computing centre, the cooling output is provided primarily via the geothermal system.
Thanks to intelligent light control systems in the warehouse, conference and training rooms, the share of power used for the lighting systems has been reduced by up to 15 percent.
The lights are only switched on when there are people in the room.
A daylight regulation system is used to dim the lights down - depending on the amount of daylight available - until a comfortable, healthy and non-fatiguing lighting mood is created in the rooms.
Additionally, only energy-saving, low-maintenance LED lights are installed throughout the building complex.